ALASKA AIR GROUP INC
424B5, 1995-06-08
AIR TRANSPORTATION, SCHEDULED
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<PAGE>
INFORMATION  CONTAINED IN  THIS PROSPECTUS  SUPPLEMENT IS  SUBJECT TO COMPLETION
PURSUANT TO RULE 424 UNDER THE SECURITIES ACT OF 1933. A REGISTRATION  STATEMENT
RELATING  TO THESE SECURITIES HAS BEEN  DECLARED EFFECTIVE BY THE SECURITIES AND
EXCHANGE COMMISSION PURSUANT  TO RULE 415  UNDER THE SECURITIES  ACT OF 1933.  A
FINAL  PROSPECTUS SUPPLEMENT AND  PROSPECTUS WILL BE  DELIVERED TO PURCHASERS OF
THESE SECURITIES.  THIS  PROSPECTUS  SUPPLEMENT AND  THE  PROSPECTUS  SHALL  NOT
CONSTITUTE  AN OFFER TO  SELL OR THE SOLICITATION  OF AN OFFER  TO BUY NOR SHALL
THERE BE  ANY  SALE OF  THESE  SECURITIES IN  ANY  STATE IN  WHICH  SUCH  OFFER,
SOLICITATION  OR SALE WOULD  BE UNLAWFUL PRIOR  TO REGISTRATION OR QUALIFICATION
UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
                             SUBJECT TO COMPLETION
              PRELIMINARY PROSPECTUS SUPPLEMENT DATED JUNE 7, 1995

PROSPECTUS SUPPLEMENT
- ----------------------------
(TO PROSPECTUS DATED MARCH 23, 1994)
                                  $100,000,000

                                     [LOGO]

                     % CONVERTIBLE SENIOR DEBENTURES DUE 2005
                                 --------------

    The   % Convertible Senior Debentures due 2005 (the "Debentures") of  Alaska
Air Group, Inc. ("Air Group" or the "Company") are convertible at any time prior
to  maturity, unless  previously redeemed, into  shares of  the Company's Common
Stock at a conversion price of $   per share (equivalent to a conversion rate of
      shares per  $1,000 principal  amount of  Debentures), subject  to  certain
adjustments. The Common Stock is listed on the New York Stock Exchange under the
symbol "ALK". On June 6, 1995, the last reported sales price of the Common Stock
on the New York Stock Exchange was $16 per share.

    Interest  on the Debentures  is payable on  June 15 and  December 15 of each
year, commencing  December  15,  1995.  The Debentures  are  redeemable  at  the
Company's option, in whole or in part, at any time on or after June 15, 1998, at
the  redemption prices set forth herein. In the event of a Change in Control (as
hereinafter defined), each holder of the  Debentures may require the Company  to
repurchase all or a portion of such holder's Debentures at 100% of the principal
amount  thereof, together with accrued and unpaid  interest, if any, to the date
of repurchase. See "Description of the Debentures."

    The Debentures will constitute senior  unsecured obligations of the  Company
and  will rank  PARI PASSU  in right  of payment  to the  Company's other senior
unsecured  indebtedness.   See   "Capitalization"  and   "Description   of   the
Debentures."  The Company is a holding  company and, accordingly, the Debentures
will be effectively subordinated to all  existing and future liabilities of  the
Company's operating subsidiaries.
                              -------------------

THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR  DISAPPROVED  BY  THE SECURITIES
  AND  EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES  COMMISSION,  NOR  HAS
    THE   SECURITIES  AND  EXCHANGE  COMMISSION   OR  ANY  STATE  SECURITIES
      COMMISSION  PASSED   UPON  THE   ACCURACY   OR  ADEQUACY   OF   THIS
       PROSPECTUS  SUPPLEMENT  OR  THE PROSPECTUS  TO  WHICH  IT RELATES.
          ANY REPRESENTATION TO  THE CONTRARY IS  A CRIMINAL  OFFENSE.

<TABLE>
<CAPTION>
                                                  PRICE TO         UNDERWRITING        PROCEEDS TO
                                                 PUBLIC (1)        DISCOUNT (2)      COMPANY (1)(3)
<S>                                           <C>                <C>                <C>
Per Debenture...............................          %                  %                  %
Total (4)...................................          $                  $                  $
<FN>
(1)  Plus accrued interest, if any, from date of issuance.
(2)  The  Company  has  agreed  to indemnify  the  several  Underwriters against
     certain liabilities  under the  Securities  Act of  1933, as  amended.  See
     "Underwriting."
(3)  Before deducting expenses payable by the Company estimated at $      .
(4)  The  Company has  granted the  several Underwriters  an option, exercisable
     within 30 days after the date of this Prospectus Supplement, to purchase up
     to an additional  $15,000,000 aggregate principal  amount of Debentures  on
     the  terms set forth above to cover over-allotments, if any. If such option
     is exercised in full, the total Price to Public, Underwriting Discount  and
     Proceeds  to Company will be $      , $      and $      , respectively. See
     "Underwriting."
</TABLE>

                              -------------------

    The Debentures are  offered by  the several Underwriters,  subject to  prior
sale,  when, as and  if issued to and  accepted by them,  subject to approval of
certain legal  matters  by  counsel  for  the  Underwriters  and  certain  other
conditions.  The Underwriters  reserve the right  to withdraw,  cancel or modify
such offer  and to  reject orders  in  whole or  in part.  It is  expected  that
delivery  of the  Debentures will  be made  in New  York, New  York on  or about
           , 1995.
                              -------------------

MERRILL LYNCH & CO.                                         GOLDMAN, SACHS & CO.
                                  ------------

          The date of this Prospectus Supplement is            , 1995.
<PAGE>
         [MAP INDICATING ALASKA AIRLINES AND HORIZON AIR ROUTES]

    IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR  EFFECT
TRANSACTIONS  WHICH STABILIZE  OR MAINTAIN  THE MARKET  PRICE OF  THE DEBENTURES
OFFERED HEREBY AND  OF THE  OUTSTANDING COMMON STOCK  OF THE  COMPANY AT  LEVELS
ABOVE THOSE WHICH MIGHT OTHERWISE PREVAIL IN THE OPEN MARKET.  SUCH TRANSACTIONS
MAY  BE EFFECTED ON THE NEW YORK  STOCK EXCHANGE OR OTHERWISE. SUCH STABILIZING,
IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.

                                      S-2
<PAGE>
                         PROSPECTUS SUPPLEMENT SUMMARY

    THE  FOLLOWING  SUMMARY  IS  QUALIFIED  IN  ITS  ENTIRETY  BY  THE  DETAILED
INFORMATION AND CONSOLIDATED FINANCIAL  STATEMENTS INCLUDED ELSEWHERE HEREIN  OR
INCORPORATED  BY REFERENCE INTO THIS  PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING
PROSPECTUS. THIS PROSPECTUS SUPPLEMENT  SHOULD BE READ  IN CONJUNCTION WITH  THE
ACCOMPANYING PROSPECTUS DATED MARCH 23, 1994.

                                  THE COMPANY

    Air  Group  is  a holding  company  incorporated  in Delaware  in  1985. Its
principal subsidiaries are Alaska Airlines, Inc. ("Alaska Airlines") and Horizon
Air Industries, Inc.  ("Horizon"). Alaska  Airlines, founded  in 1932,  provides
scheduled air transportation to 37 cities in Alaska, Washington, Oregon, Nevada,
California  and Arizona, three cities in Mexico, three cities in the Russian Far
East and many smaller communities in Alaska and California through  code-sharing
agreements  with  local  carriers.  As of  December  31,  1994,  Alaska Airlines
operated 23 owned and 49 leased jet  aircraft with an average age of six  years.
Horizon,  a regional  commuter carrier founded  in 1981,  provides scheduled air
transportation  to  36  cities  in   Washington,  Oregon,  Montana,  Idaho   and
California,  as well as  two cities in  Canada. Horizon provides interconnecting
passenger traffic  to Alaska  Airlines through  its major  hub cities,  Seattle,
Portland  and Spokane. As of December 31,  1994, Horizon operated five owned and
60 leased aircraft with an average age of nine years.

    For the year  ended December  31, 1994, Air  Group's consolidated  operating
revenues were $1.3 billion, of which 89% came from scheduled passenger services,
7%  came from freight and mail, and 4% came from mileage plan partners and other
nonpassenger  sources.  Alaska  Airlines   carried  approximately  9.0   million
passengers   in  1994  and  accounted  for  approximately  81%  of  Air  Group's
consolidated 1994 operating revenues. Horizon carried approximately 3.5  million
passengers  in  1994  and  accounted  for  the  remaining  19%  of  Air  Group's
consolidated 1994 operating revenues.

    The Company's strategy is  to define strategic markets  and then to  achieve
strong  market positions by offering high-quality service at competitive prices.
The combined  route system  of Alaska  Airlines and  Horizon, when  viewed as  a
whole,  blends  aspects  of  both  the  hub-and-spoke  and  linear  route system
concepts, resulting in an integrated  system that provides passengers with  more
frequent flights than the Company's competitors in a substantial majority of the
150 nonstop city pairs that the Company serves. Both Alaska Airlines and Horizon
seek  to differentiate  themselves from  their competitors  by offering superior
levels of value and service. Alaska Airlines' service has been recognized with a
number of awards, including Airline of the Year awards from CONDE NAST  TRAVELER
magazine  in five of the last six  years and high rankings in consumer magazines
and customer surveys by  J.D. Power & Associates  and the Zagat's United  States
Travel Survey.

                                  THE OFFERING

<TABLE>
<S>                                 <C>
Issue.............................  $100,000,000 principal amount of    % Convertible Senior
                                    Debentures due 2005.

Interest..........................  Each  Debenture will bear interest at a rate of    % per
                                    annum. Interest will be paid semiannually on June 15 and
                                    December 15 of each year, commencing December 15,  1995.
                                    See  "Description  of the  Debentures--General"  in this
                                    Prospectus Supplement.

Conversion Rights.................  Each Debenture  will  be convertible,  at  the  holder's
                                    option,  at  any time  on or  prior to  maturity, unless
                                    previously redeemed or otherwise purchased, into  Common
                                    Stock  at  a  conversion  price  of  $        per  share
                                    (equivalent to a conversion rate of           shares per
                                    $1,000  principal  amount  of  Debentures),  subject  to
                                    certain    adjustments.   See    "Description   of   the
                                    Debentures-- Conversion" in this Prospectus Supplement.
</TABLE>

                                      S-3
<PAGE>

<TABLE>
<S>                                 <C>
Optional Redemption...............  The Debentures will be redeemable, in whole or in  part,
                                    at the Company's option at any time on or after June 15,
                                    1998,  initially at    % of their principal amount, plus
                                    accrued interest, declining to  100% of their  principal
                                    amount,  plus  accrued interest,  on  or after  June 15,
                                    2004. See "Description of the Debentures--Redemption" in
                                    this Prospectus Supplement.

Purchase of Debentures
Upon a Change in Control..........  At the holder's  option, the Company  will purchase  for
                                    cash  any Debenture,  as of  35 business  days after the
                                    occurrence of a Change in Control of the Company, for  a
                                    Change  in Control Purchase  Price equal to  100% of the
                                    principal  amount  thereof,  plus  accrued  and   unpaid
                                    interest,  if  any, to  the  Change in  Control Purchase
                                    Date. The  Change in  Control  purchase feature  of  the
                                    Debentures   may  in   certain  circumstances   have  an
                                    antitakeover   effect.   See    "Description   of    the
                                    Debentures--Purchase  of  Debentures  Upon  a  Change in
                                    Control" in this Prospectus Supplement for a summary  of
                                    these  provisions  and  the  definitions  of  the  above
                                    defined terms.

Ranking...........................  The  Debentures   will   constitute   senior   unsecured
                                    obligations  of Air  Group and  will rank  PARI PASSU in
                                    right of payment to  Air Group's other senior  unsecured
                                    indebtedness. See "Description of the
                                    Debentures--Ranking"  in this Prospectus Supplement. Air
                                    Group  is  a  holding  company  and,  accordingly,   the
                                    Debentures  will  be  effectively  subordinated  to  all
                                    existing and future liabilities of Air Group's operating
                                    subsidiaries, including Alaska Airlines and Horizon.

Use of Proceeds...................  The net proceeds to the Company from this offering  will
                                    be  added  to  working  capital  and  used  for  general
                                    corporate  purposes,   including   the   redemption   or
                                    repurchase  of  the  Company's outstanding  7  1/4% zero
                                    coupon convertible subordinated notes due 2006.  Pending
                                    such  uses, the  net proceeds  of this  offering will be
                                    invested in short-term, interest-bearing securities. See
                                    "Use of Proceeds" in this Prospectus Supplement.
</TABLE>

                                      S-4
<PAGE>
                      SUMMARY FINANCIAL AND OPERATING DATA

    The following table summarizes selected financial and operating  information
for  Air Group and its principal  subsidiaries, Alaska Airlines and Horizon. The
consolidated financial data for each of the five years ended December 31,  1994,
set forth below, have been taken from the financial data included in Air Group's
Form 10-K for the year ended December 31, 1994 incorporated by reference in this
Prospectus  Supplement  and the  related  Registration Statement.  The financial
statements for the  five years  ended December 31,  1994 have  been examined  by
Arthur Andersen LLP, independent public accountants. This summary should be read
in  conjunction with the financial statements,  including the notes thereto, and
other information  contained in  the documents  incorporated by  reference.  The
selected  financial information for the three month periods ended March 31, 1995
and 1994 is unaudited  but includes all adjustments  (consisting only of  normal
recurring  adjustments) that are necessary, in  the opinion of management, for a
fair presentation  of  results  of  operations for  such  periods.  The  airline
business  is seasonal in nature  and the operating results  for the three months
ended March 31, 1995  are not necessarily indicative  of results to be  expected
for the full year.
<TABLE>
<CAPTION>
                                            THREE MONTHS ENDED MARCH 31,
                                          ---------------------------------
                                               1995              1994
                                          ---------------   ---------------
                                               (DOLLARS IN THOUSANDS)
<S>                                       <C>               <C>
CONSOLIDATED FINANCIAL DATA:
STATEMENT OF OPERATIONS DATA:
Operating revenues......................  $  294,573        $  280,382
Operating expenses......................     312,874           283,310
Operating income (loss).................     (18,301)           (2,928)
Net income (loss).......................  $  (16,340)       $   (6,313)
Average primary shares outstanding
 (000)..................................      13,400            13,349
Primary earnings (loss) per share (a)...  $    (1.22)       $    (0.47)
Fully diluted earnings per share........         (b)               (b)
BALANCE SHEET DATA (AT END OF PERIOD):
Total assets............................  $1,287,833        $1,191,587
Long-term debt and capital lease
 obligations............................     579,236           593,405
Redeemable preferred stock..............          --                --
Shareholders' equity....................     175,313           160,919

ALASKA AIRLINES OPERATING DATA (C):
Revenue passenger miles (000,000).......       1,793             1,536
Available seat miles (000,000)..........       3,182             2,553
Revenue passenger load factor...........        56.4%             60.2%
Yield per passenger mile................        11.2 CENTS        12.8 CENTS
Operating expenses per available seat
 mile...................................         7.8 CENTS         8.9 CENTS

HORIZON AIR OPERATING DATA (C):
Revenue passenger miles (000,000).......         186               143
Available seat miles (000,000)..........         323               241
Revenue passenger load factor...........        57.7%             59.4%
Yield per passenger mile................        31.9 CENTS        35.7 CENTS
Operating expenses per available seat
 mile...................................        20.6 CENTS        22.9 CENTS

<CAPTION>

                                                                        YEAR ENDED DECEMBER 31,
                                        ---------------------------------------------------------------------------------------

                                             1994              1993              1992              1991              1990

                                        ---------------   ---------------   ---------------   ---------------   ---------------

<S>                                       <C>             <C>               <C>               <C>               <C>
CONSOLIDATED FINANCIAL DATA:
STATEMENT OF OPERATIONS DATA:
Operating revenues......................$1,315,620        $1,128,329        $1,115,378        $1,104,031        $1,046,965

Operating expenses...................... 1,240,622         1,145,102         1,210,219         1,069,405         1,018,546

Operating income (loss).................    74,998           (16,773)          (94,841)           34,626            28,419

Net income (loss).......................$   22,531        $  (30,918)       $  (84,837)       $   10,338        $   17,167

Average primary shares outstanding
 (000)..................................    13,378            13,340            13,309            13,413            13,675

Primary earnings (loss) per share (a)...$     1.68        $    (2.51)       $    (6.87)       $     0.27        $     0.82

Fully diluted earnings per share........      1.62               (b)               (b)               (b)               (b)

BALANCE SHEET DATA (AT END OF PERIOD):
Total assets............................$1,315,771        $1,134,954        $1,208,358        $1,225,455        $1,021,404

Long-term debt and capital lease
 obligations............................   589,904           525,418           487,847           499,971           281,759

Redeemable preferred stock..............        --                --            61,235            60,947            60,665

Shareholders' equity....................   191,278           166,833           196,724           284,447           279,833

ALASKA AIRLINES OPERATING DATA (C):
Revenue passenger miles (000,000).......     7,587             5,514             5,537             4,948             4,494

Available seat miles (000,000)..........    12,082             9,426             9,617             8,789             8,380

Revenue passenger load factor...........      62.8%             58.5%             57.6%             56.3%             53.6%

Yield per passenger mile................      12.2 CENTS        14.3 CENTS        14.5 CENTS        16.7 CENTS        17.8 CENTS

Operating expenses per available seat
 mile...................................       8.3 CENTS         9.9 CENTS        10.5 CENTS        10.2 CENTS        10.3 CENTS

HORIZON AIR OPERATING DATA (C):
Revenue passenger miles (000,000).......       733               560               486               405               357

Available seat miles (000,000)..........     1,165               986               905               786               720

Revenue passenger load factor...........      62.9%             56.8%             53.7%             51.5%             49.6%

Yield per passenger mile................      33.3 CENTS        37.9 CENTS        40.7 CENTS        42.9 CENTS        43.4 CENTS

Operating expenses per available seat
 mile...................................      21.0 CENTS        21.8 CENTS        22.2 CENTS        22.3 CENTS        21.9 CENTS

<FN>
- ------------------------------
(a)   For  1992, primary earnings per share includes $(.34) for the $4.6 million
      cumulative effect of the postretirement  benefits accounting change as  of
      January 1, 1992.
(b)   Antidilutive.
(c)   See "Selected Financial and Operating Data" for definition of terms.
</TABLE>

                                      S-5
<PAGE>
                                  THE COMPANY

    Air  Group  is  a holding  company  incorporated  in Delaware  in  1985. Its
principal subsidiaries are Alaska Airlines and Horizon. Alaska Airlines, founded
in  1932,  provides  scheduled  air  transportation  to  37  cities  in  Alaska,
Washington,  Oregon,  Nevada, California  and Arizona,  three cities  in Mexico,
three cities in the Russian Far East and many smaller communities in Alaska  and
California  through code-sharing agreements with  local carriers. As of December
31, 1994, Alaska Airlines operated 23 owned  and 49 leased jet aircraft with  an
average  age of six years. Horizon, a regional commuter carrier founded in 1981,
provides scheduled  air  transportation  to 36  cities  in  Washington,  Oregon,
Montana, Idaho and California, as well as two cities in Canada. Horizon provides
interconnecting  passenger  traffic to  Alaska  Airlines through  its  major hub
cities, Seattle, Portland and Spokane. As of December 31, 1994, Horizon operated
five owned and 60 leased aircraft with an average age of nine years.

    For the year  ended December  31, 1994, Air  Group's consolidated  operating
revenues were $1.3 billion, of which 89% came from scheduled passenger services,
7%  came from freight and mail, and 4% came from mileage plan partners and other
nonpassenger  sources.  Alaska  Airlines   carried  approximately  9.0   million
passengers   in  1994  and  accounted  for  approximately  81%  of  Air  Group's
consolidated 1994 operating revenues. Horizon carried approximately 3.5  million
passengers  in  1994  and  accounted  for  the  remaining  19%  of  Air  Group's
consolidated 1994 operating revenues.

    The Company's strategy is  to define strategic markets  and then to  achieve
strong  market positions by offering high-quality service at competitive prices.
The combined  route system  of Alaska  Airlines and  Horizon, when  viewed as  a
whole,  blends  aspects  of  both  the  hub-and-spoke  and  linear  route system
concepts, resulting  in  an  integrated system  that  provides  passengers  more
frequent flights than the Company's competitors in a substantial majority of the
150 nonstop city pairs that the Company serves. Both Alaska Airlines and Horizon
seek  to differentiate  themselves from  their competitors  by offering superior
levels of value and service. Alaska Airlines' service has been recognized with a
number of awards, including Airline of the Year awards from CONDE NAST  TRAVELER
magazine  in five of the last six  years and high rankings in consumer magazines
and customer surveys by  J.D. Power & Associates  and the Zagat's United  States
Travel Survey.

COST AND PRODUCTIVITY IMPROVEMENTS

    In  response to changing conditions and intense competition, Alaska Airlines
executed a cost reduction and productivity improvement program beginning in 1992
and continuing into 1995. As a result of this program, Alaska Airlines has  been
able  to significantly reduce its cost per available seat mile ("ASM") from 10.2
cents in 1992 to  8.3 cents in  1994 and to  7.8 cents in  the first quarter  of
1995. The program embodies the following five key elements:

    - Achieving permanent reductions in operating costs

    - Improving productivity of equipment

    - Improving productivity of employees

    - Reducing or eliminating unprofitable flights

    - Restructuring  the Company's finances  to reduce high-cost  debt and lease
      expense

    OPERATING COST REDUCTION.  Management  reviewed and evaluated every  Company
program   to   eliminate   nonessential   activities.   Vendor   contracts  were
renegotiated, operating procedures revised, and staffing levels reduced. Without
compromising quality, Alaska  Airlines and Horizon  reduced their inflight  meal
costs  by altering menus,  emphasizing lighter fare,  and discontinuing meals on
shorter flights and  on those  flights operating outside  of regular  mealtimes.
Alaska  Airlines and  Horizon are  currently developing  an electronic ticketing
program, as well as other more direct methods for ticket distribution, which are
expected to  offer improved  customer convenience  and may  reduce  distribution
costs.

    FLEET  PRODUCTIVITY.  Recognizing the cost savings that could be achieved by
operating a more efficient fleet,  Alaska Airlines undertook a targeted  program
of aircraft retirement. Since 1992, Alaska Airlines has

                                      S-6
<PAGE>
retired  25  older Boeing  727-200/100 aircraft  while  adding 33  new McDonnell
Douglas MD-80 and  Boeing 737-400  aircraft, which has  resulted in  significant
fuel, labor and maintenance cost savings. The new aircraft are 33%-45% more fuel
efficient  and have contributed to lower labor costs since they require only two
pilots, compared to the three required by the older aircraft.

    While cost  reductions were  the centerpiece  of operating  improvements  in
1993,  productivity improvements were the focus  in 1994. By reducing turn times
and increasing  the workday,  Alaska  Airlines increased  aircraft  utilization,
measured  in block hours  per day per aircraft,  from 8.5 hours  in 1992 to 10.3
hours in 1994 and to 10.4 hours in the first quarter of 1995.

    EMPLOYEE PRODUCTIVITY.  Alaska Airlines has also found ways to significantly
improve employee  productivity.  From  1992 to  1994,  employees  per  departure
improved  12.8%, passengers per  employee increased 44.0%  and ASMs per employee
grew 26.2%. During the  same period, Horizon also  showed increases in ASMs  per
employee and passengers per employee.

    IMPROVED  PROFITABILITY OF  ROUTE STRUCTURE.   Alaska  Airlines reviewed its
route structure to  identify nonprofitable flights.  Service to Boise,  Spokane,
Tucson,  Long Beach, Guadalajara and Mexico  City was suspended. Marginal routes
were  pared,  and  aircraft  were  reassigned  to  core  routes  in  Alaska  and
California.  The Company also  continued to explore  new opportunities to expand
its markets. Service was added  to Las Vegas, Reno,  Sacramento and a number  of
smaller communities in Alaska.

    FINANCIAL  RESTRUCTURING.   The Company  took advantage  of historically low
interest rates to restructure its higher-cost obligations. $61.2 million of  the
Company's  preferred stock was  redeemed in 1993,  thereby eliminating preferred
dividends and reducing  the Company's after-tax  capital costs by  more than  $4
million  per year. In addition, the  Company further reshaped its cost structure
by entering into  an agreement  in late  1994 with  International Lease  Finance
Corporation  that provides lower  ownership costs for 20  of Alaska Airlines' 22
Boeing 737-400 aircraft. This new agreement  is expected to generate savings  of
more than $6 million annually over its 10-year term.

MARKET SHARE

    ALASKA AIRLINES

    During  the first quarter of 1995, Alaska  Airlines had the highest share of
nonstop flights along its routes in each of its following major markets:
<TABLE>
<CAPTION>
                                               WEST COAST U.S. TO
    PACIFIC NORTHWEST TO ALASKA                WEST COAST MEXICO
- ------------------------------------  ------------------------------------
<S>                        <C>        <C>                        <C>
ALASKA AIRLINES                61.0%  ALASKA AIRLINES                52.9%
MarkAir (1)                    15.0%  Delta                          13.7%
Delta                           9.4%  AeroMexico                     13.7%
United                          5.4%  Mexicana                       12.8%
All Others                      9.2%  Aero California                 6.9%

<CAPTION>

        PACIFIC NORTHWEST TO                  PACIFIC NORTHWEST TO
        NORTHERN CALIFORNIA                   SOUTHERN CALIFORNIA
- ------------------------------------  ------------------------------------
<S>                        <C>        <C>                        <C>
ALASKA AIRLINES                41.5%  ALASKA AIRLINES                72.1%
United/United Shuttle          32.4%  United/United Shuttle          14.6%
Southwest                      16.3%  Delta                          10.1%
Reno Air                        5.0%  MarkAir (1)                     3.1%
All Others                      4.8%  All Others                       .1%

Source: Official Airline Guide Standard Scheduling Information Manual dated May
 4, 1995.
<FN>
- ------------------------
(1)  MarkAir has since ceased operating in these markets. See "Recent Operating
     Results and Developments."
</TABLE>

                                      S-7
<PAGE>
    Approximately 65% of  Alaska Airlines'  passengers travel  from the  Pacific
Northwest  to  other West  Coast destinations,  25%  travel between  the Pacific
Northwest and Alaska or within Alaska, and 10% travel internationally. The  most
significant  element  of Alaska  Airlines' route  system  is its  high frequency
service in all the major West Coast markets that it serves.

    Alaska Airlines provides extensive service between the Pacific Northwest and
both the Northern California and Southern California markets, as well as  within
the  Pacific  Northwest  region. Less  than  three percent  of  Alaska Airlines'
service is on intra-California routes.

    Over half of the U.S.  cities served by Alaska  Airlines are located in  the
state  of Alaska.  In each  year since  1973, Alaska  Airlines has  carried more
passengers between Alaska and the U.S.  mainland than any other airline.  Alaska
Airlines  also serves many smaller communities  in Alaska and California through
code-sharing agreements with local carriers.

    Alaska Airlines  serves  three resort  cities  in Mexico:  Puerta  Vallarta,
Mazatlan  and Los Cabos. Traffic in these markets is strongest during the winter
months, which partially offsets the  reduced seasonal demand in Alaska,  thereby
allowing  the  Company to  better utilize  its  aircraft fleet.  Alaska Airlines
serves the Russian Far East with flights to Magadan, Khabarovsk and Vladivostok,
and plans to begin service this summer to Petropavlosk.

    HORIZON

    Horizon is the largest regional airline in the Pacific Northwest, and serves
36 cities in Washington, Oregon, Montana,  Idaho and California, as well as  two
cities in Canada. In 1994, Horizon carried approximately 3.5 million passengers.

    Horizon  flights are  listed under  the Alaska  Airlines designator  code in
airline computer reservation  systems. Certain Horizon  flights are also  listed
under  the  Northwest  designator code.  In  1994, 24%  of  Horizon's passengers
connected to  Alaska Airlines  flights  and another  8% connected  to  Northwest
Airlines  flights. The number  of passengers connecting  between Alaska Airlines
and Horizon rose  44% in 1994.  In contrast to  most regional airlines,  Horizon
relies  much less on connecting traffic, with over half of its passengers having
origins and destinations within the Horizon route system.

SERVICE

    The Company generally offers the same low fares as its competitors, but with
more frequent service. The Company, however, believes that both Alaska  Airlines
and  Horizon offer superior value to their customers by providing a higher level
of customer service and amenities as compared to their major competitors. Unlike
its major competitors, Alaska Airlines continues to offer meal service,  advance
seat  selection and a  first-class cabin. Additionally,  Alaska Airlines' fleet,
with an average age of six years, is the youngest of any major U.S. carrier  and
is  configured  to create  more  legroom for  its  passengers. The  Company also
provides interline services that  allow passengers to be  ticketed and to  check
their  baggage to their  final destinations on virtually  every major airline in
the world.

    The Company's mileage program allows customers to earn mileage credits while
flying on Alaska  Airlines, as well  as Horizon, Northwest  Airlines, TWA,  SAS,
Qantas  and British Airways. Mileage credit can be redeemed for travel on Alaska
Airlines, Horizon or any  of the program partners  for reward travel  worldwide.
Mileage  can also be earned from marketing partners such as credit card issuers,
long-distance telecommunications carriers, hotels and car rental firms. In 1994,
the Company generated $34 million in  revenues from sales of mileage credits  to
nonairline partners.

EMPLOYEES

    Alaska  Airlines had 6,901 full-time and  part-time employees as of December
31, 1994, approximately 87% of whom are represented under collective  bargaining
agreements.  No material  Alaska Airlines  labor agreements  are amendable until
September 1997.

    Horizon had 2,951 full-time and part-time employees as of December 31, 1994,
approximately  20%  of   whom  are  represented   under  collective   bargaining
agreements.

                                      S-8
<PAGE>
                                USE OF PROCEEDS

    The  net proceeds  to the  Company from the  sale of  the Debentures offered
hereby are estimated to be approximately $       (excluding expenses other  than
the  Underwriters' discount  and assuming that  the Underwriters' over-allotment
option is not exercised). Such net proceeds will be added to working capital and
used for general corporate purposes,  including the redemption or repurchase  of
the  Company's outstanding 7 1/4% zero coupon convertible subordinated notes due
2006, which the  Company may be  obligated to  repurchase at the  option of  the
holders  thereof on April 18, 1996. Pending  such uses, the net proceeds of this
offering will be invested in short-term, interest-bearing securities.

                                 CAPITALIZATION

    The following table sets forth Air Group's consolidated capitalization as of
March 31, 1995 and  as adjusted to  reflect the sale  of the Debentures  offered
hereby,  assuming  no exercise  of the  Underwriters' over-allotment  option and
without giving effect to the Underwriters' discount and the payment of expenses,
and does not reflect application of the net proceeds of this offering. See  "Use
of Proceeds."

<TABLE>
<CAPTION>
                                                                                               MARCH 31, 1995
                                                                                           -----------------------
                                                                                             ACTUAL    AS ADJUSTED
                                                                                           ----------  -----------
                                                                                               (IN THOUSANDS)
<S>                                                                                        <C>         <C>
Indebtedness:
  Short-term borrowings..................................................................  $    4,000   $   4,000
  Current portion of long-term debt and capital lease obligations........................      72,080      72,080
  Notes payable due through 2009.........................................................     325,077     325,077
    % convertible senior debentures due 2005.............................................          --     100,000
  Convertible subordinated debentures:
    7 3/4% due 2005-2010.................................................................      14,354      14,354
    6 7/8% due 2000-2014.................................................................      54,041      54,041
  7 1/4% zero coupon convertible subordinated notes due 2006.............................     130,085     130,085
  Long-term capital lease obligations....................................................      55,679      55,679
                                                                                           ----------  -----------
      Total indebtedness.................................................................  $  655,316   $ 755,316
                                                                                           ----------  -----------
Shareholders' Equity:
  Common stock, par value $1.00 per share (30,000,000 shares authorized; 13,402,186
   shares outstanding)...................................................................  $   97,534   $  97,534
  Deferred compensation..................................................................      (4,353)     (4,353)
  Retained earnings......................................................................      82,132      82,132
                                                                                           ----------  -----------
      Total shareholders' equity.........................................................  $  175,313   $ 175,313
                                                                                           ----------  -----------
        Total capitalization.............................................................  $  830,629   $ 930,629
                                                                                           ----------  -----------
                                                                                           ----------  -----------
</TABLE>

                   RECENT OPERATING RESULTS AND DEVELOPMENTS

    Air  Group incurred a first quarter 1995 net loss of $16.3 million, or $1.22
per share, compared to a  net loss of $6.3 million,  or $0.47 per share, in  the
prior year's first quarter. The operating loss for the quarter was $18.3 million
compared  to $2.9 million for the same  quarter the prior year. The 1995 results
reflect lower  average  fares and  load  factors  at both  Alaska  Airlines  and
Horizon.

    Alaska  Airlines' passenger revenues,  which accounted for  86% of its total
operating revenues,  increased  1.5% in  the  first quarter  of  1995 on  a  17%
increase in passenger traffic. Capacity increased 25% primarily due to increased
flights  in the Pacific Northwest-to-California  market. The load factor dropped
from 60.2% in the first quarter of 1994  to 56.4% in the first quarter of  1995.
Passenger  yields declined  13% to  11.2 cents per  passenger mile  in the first
quarter of  1995, reflecting  increased competition  in the  West Coast  routes.
Operating  cost per ASM decreased 13% to 7.8 cents in the first quarter of 1995,
compared to 8.9 cents in the first quarter of 1994.

                                      S-9
<PAGE>
    During the fourth  quarter of  1994 and the  first quarter  of 1995,  Alaska
Airlines experienced yield declines resulting from low fare offerings across its
system.  Although several fare increases have occurred since early February, the
lingering effect  of these  low fare  offerings will  have an  impact on  second
quarter  results. In  addition, for  the past  several months  industry capacity
increases  in  Alaska  Airlines'  West  Coast  markets  have  exceeded   traffic
increases, resulting in lower load factors.

    MarkAir,  a significant competitor of Alaska Airlines in the state of Alaska
since 1992, filed for  Chapter 11 bankruptcy  for the second  time on April  14,
1995 and ceased operating in all of Alaska Airlines' markets at the end of April
1995.

    Horizon's passenger revenues, which accounted for 95% of its total operating
revenues,  increased  16% in  the first  quarter of  1995 on  a 30%  increase in
passenger traffic. Capacity increased 34% due to the addition of larger-capacity
Fokker F-28 jets  and Dornier 328  turboprop aircraft. The  load factor  dropped
from  59.4% in the first quarter of 1994  to 57.7% in the first quarter of 1995.
Passenger yields  declined  11%  to  31.9 cents  per  passenger  mile  in  1995,
reflecting increased competition and longer passenger trips.

    The  International Association  of Machinists (the  "IAM") represents Alaska
Airlines' clerical, office and passenger  service employees. On April 17,  1995,
Alaska  Airlines and the IAM reached  agreement on an amended four-year contract
for these employees; the contract was ratified by the employees in early May. In
April 1995, Horizon's  mechanics and  related classifications  of the  Transport
Workers Union of America ratified a new three-year contract.

                          PRICE RANGE OF COMMON STOCK

    The  Company's Common Stock  is listed on  the New York  Stock Exchange. The
following table indicates the high and low  sales prices of the Common Stock  as
reported by the New York Stock Exchange for the periods indicated.

<TABLE>
<CAPTION>
                                            HIGH        LOW
                                           -------    -------
<S>                                        <C>        <C>
1993
  First Quarter.........................   $18        $15 5/8
  Second Quarter........................    17 7/8     14 1/4
  Third Quarter.........................    15         12 1/4
  Fourth Quarter........................    17 3/8     12 1/2

1994
  First Quarter.........................   $18 7/8    $13 5/8
  Second Quarter........................    16 1/8     13 3/4
  Third Quarter.........................    17 7/8     14 3/8
  Fourth Quarter........................    18         13 1/8

1995
  First Quarter.........................   $16 3/4    $13 1/2
  Second Quarter (through June 6,
   1995)................................    17 1/4     14 1/2
</TABLE>

                                      S-10
<PAGE>
                     SELECTED FINANCIAL AND OPERATING DATA

    The  following table summarizes selected financial and operating information
for Air Group and its principal  subsidiaries, Alaska Airlines and Horizon.  The
consolidated  financial data for each of the five years ended December 31, 1994,
set forth below, have been taken from the financial data included in Air Group's
Form 10-K for the year ended December 31, 1994 incorporated by reference in this
Prospectus Supplement  and the  related  Registration Statement.  The  financial
statements  for the  five years  ended December 31,  1994 have  been examined by
Arthur Andersen LLP, independent public accountants. This summary should be read
in conjunction with the financial  statements, including the notes thereto,  and
other  information  contained in  the documents  incorporated by  reference. The
selected financial information for the three month periods ended March 31,  1995
and  1994 is unaudited  but includes all adjustments  (consisting only of normal
recurring adjustments) that are necessary, in  the opinion of management, for  a
fair  presentation  of  results  of operations  for  such  periods.  The airline
business is seasonal in  nature and the operating  results for the three  months
ended  March 31, 1995 are  not necessarily indicative of  results to be expected
for the full year.
<TABLE>
<CAPTION>
                                      THREE MONTHS ENDED MARCH 31,
                                    ---------------------------------
                                         1995              1994
                                    ---------------   ---------------
                                         (DOLLARS IN THOUSANDS)
<S>                                 <C>               <C>
CONSOLIDATED FINANCIAL DATA:
STATEMENT OF OPERATIONS DATA:
Operating revenues................  $  294,573        $  280,382
Operating expenses................     312,874           283,310
Operating income (loss)...........     (18,301)           (2,928)
Other nonoperating expense, net
 (a)..............................     (11,636)           (8,084)
Income (loss) before income tax
 expense and accounting change....     (29,937)          (11,012)
Net income (loss).................  $  (16,340)       $   (6,313)
Average primary shares outstanding
 (000)............................      13,400            13,349
Primary earnings (loss) per share
 (b)..............................  $    (1.22)       $    (0.47)
Fully diluted earnings per
 share............................         (c)               (c)
Cash dividends per share..........          --                --
BALANCE SHEET DATA (AT END OF
 PERIOD):
Total assets......................  $1,287,833        $1,191,587
Long-term debt and capital lease
 obligations......................     579,236           593,405
Redeemable preferred stock........          --                --
Shareholders' equity..............     175,313           160,919
Ratio of earnings to fixed
 charges..........................         (d)               (d)

ALASKA AIRLINES OPERATING DATA:
Revenue passenger miles
 (000,000)........................       1,793             1,536
Available seat miles (000,000)....       3,182             2,553
Revenue passenger load factor.....        56.4%             60.2%
Yield per passenger mile..........        11.2 CENTS        12.8 CENTS
Operating expenses per available
 seat mile........................         7.8 CENTS         8.9 CENTS

HORIZON AIR OPERATING DATA:
Revenue passenger miles
 (000,000)........................         186               143
Available seat miles (000,000)....         323               241
Revenue passenger load factor.....        57.7%             59.4%
Yield per passenger mile..........        31.9 CENTS        35.7 CENTS
Operating expenses per available
 seat mile........................        20.6 CENTS        22.9 CENTS

<CAPTION>

                                                                  YEAR ENDED DECEMBER 31,
                                  ---------------------------------------------------------------------------------------

                                       1994              1993              1992              1991              1990

                                  ---------------   ---------------   ---------------   ---------------   ---------------

<S>                                 <C>             <C>               <C>               <C>               <C>
CONSOLIDATED FINANCIAL DATA:
STATEMENT OF OPERATIONS DATA:
Operating revenues................$1,315,620        $1,128,329        $1,115,378        $1,104,031        $1,046,965

Operating expenses................ 1,240,622         1,145,102         1,210,219         1,069,405         1,018,546

Operating income (loss)...........    74,998           (16,773)          (94,841)           34,626            28,419

Other nonoperating expense, net
 (a)..............................   (34,037)          (29,039)          (30,865)          (18,419)             (501)

Income (loss) before income tax
 expense and accounting change....    40,961           (45,812)         (125,706)           16,207            27,918

Net income (loss).................$   22,531        $  (30,918)       $  (84,837)       $   10,338        $   17,167

Average primary shares outstanding
 (000)............................    13,378            13,340            13,309            13,413            13,675

Primary earnings (loss) per share
 (b)..............................$     1.68        $    (2.51)       $    (6.87)       $     0.27        $     0.82

Fully diluted earnings per
 share............................      1.62               (c)               (c)               (c)               (c)

Cash dividends per share..........        --                --        $     0.15        $     0.20        $     0.20

BALANCE SHEET DATA (AT END OF
 PERIOD):
Total assets......................$1,315,771        $1,134,954        $1,208,358        $1,225,455        $1,021,404

Long-term debt and capital lease
 obligations......................   589,904           525,418           487,847           499,971           281,759

Redeemable preferred stock........        --                --            61,235            60,947            60,665

Shareholders' equity..............   191,278           166,833           196,724           284,447           279,833

Ratio of earnings to fixed
 charges..........................      1.36               (d)               (d)              1.10              1.32

ALASKA AIRLINES OPERATING DATA:
Revenue passenger miles
 (000,000)........................     7,587             5,514             5,537             4,948             4,494

Available seat miles (000,000)....    12,082             9,426             9,617             8,789             8,380

Revenue passenger load factor.....      62.8%             58.5%             57.6%             56.3%             53.6%

Yield per passenger mile..........      12.2 CENTS        14.3 CENTS        14.5 CENTS        16.7 CENTS        17.8 CENTS

Operating expenses per available
 seat mile........................       8.3 CENTS         9.9 CENTS        10.5 CENTS        10.2 CENTS        10.3 CENTS

HORIZON AIR OPERATING DATA:
Revenue passenger miles
 (000,000)........................       733               560               486               405               357

Available seat miles (000,000)....     1,165               986               905               786               720

Revenue passenger load factor.....      62.9%             56.8%             53.7%             51.5%             49.6%

Yield per passenger mile..........      33.3 CENTS        37.9 CENTS        40.7 CENTS        42.9 CENTS        43.4 CENTS

Operating expenses per available
 seat mile........................      21.0 CENTS        21.8 CENTS        22.2 CENTS        22.3 CENTS        21.9 CENTS

<FN>
- ------------------------------
(a)   Includes capitalized interest of $0 and  $.1 million for the three  months
      ended March 31, 1995 and 1994, respectively, and $.4 million, $.5 million,
      $6.1  million, $8.3 million  and $9.0 million for  the year ended December
      31, 1994, 1993, 1992, 1991 and 1990, respectively.
(b)   For 1992, primary earnings per share includes $(.34) for the $4.6  million
      cumulative  effect of the postretirement  benefits accounting change as of
      January 1, 1992.
(c)   Antidilutive.
(d)   For 1993 and 1992, earnings are inadequate to cover fixed charges by $46.3
      million and $131.8 million, respectively. For the three months ended March
      31, 1995 and 1994, earnings are inadequate to cover fixed charges by $29.9
      million and $11.1 million, respectively.
</TABLE>

                                      S-11
<PAGE>
    REVENUE PASSENGER  MILES--THE  NUMBER  OF  PAYING  PASSENGERS  ON  A  FLIGHT
MULTIPLIED BY THE ROUTE MILES OF THAT FLIGHT, SUMMED FOR ALL PASSENGER FLIGHTS.

    AVAILABLE  SEAT  MILES--AIRCRAFT MILES  FLOWN  MULTIPLIED BY  THE  NUMBER OF
AVAILABLE SEATS  ON  THE  AIRCRAFT;  REPRESENTS  THE  TOTAL  PASSENGER  CARRYING
CAPACITY OFFERED.

    REVENUE  PASSENGER LOAD FACTOR--REVENUE PASSENGER MILES DIVIDED BY AVAILABLE
SEAT MILES; REPRESENTS  THE PERCENTAGE  OF AVAILABLE SEAT  CAPACITY OCCUPIED  BY
REVENUE PASSENGERS.

    YIELD  PER PASSENGER MILE--REPRESENTS THE AVERAGE PASSENGER REVENUE RECEIVED
FOR EACH MILE A PASSENGER IS CARRIED.

    OPERATING  EXPENSES  PER  AVAILABLE  SEAT  MILE--REPRESENTS  THE  RESULT  OF
OPERATING EXPENSES DIVIDED BY AVAILABLE SEAT MILES.

                                      S-12
<PAGE>
                         DESCRIPTION OF THE DEBENTURES

    The  following description of the particular terms of the Debentures offered
hereby (referred  to in  the accompanying  Prospectus as  the "Convertible  Debt
Securities") supplements and, to the extent inconsistent therewith, replaces the
description  of  the  general  terms  and  provisions  of  the  Convertible Debt
Securities set  forth  in  the accompanying  Prospectus,  to  which  description
reference  is hereby made. Capitalized  terms used but not  defined herein or in
the accompanying Prospectus have the meanings given to them in the Indenture (as
hereinafter defined)  or the  Supplemental Indenture  (as hereinafter  defined).
Section references are to the Supplemental Indenture unless otherwise indicated.

GENERAL

    The  Debentures will constitute senior  unsecured obligations of the Company
limited to $100,000,000 aggregate principal amount, plus such additional  amount
not  in  excess of  $15,000,000 as  may  be purchased  by the  Underwriters upon
exercise of the over-allotment option.  See "Underwriting." The Debentures  will
mature  on June 15, 2005. The Debentures will constitute a series of Convertible
Senior Debt Securities (as defined in  the accompanying Prospectus) and will  be
issued  under an Indenture, dated as of June   , 1995 (the "Indenture"), between
the Company and Harris Trust and  Savings Bank, as trustee (the "Trustee"),  the
terms  of  which are  more fully  described in  the accompanying  Prospectus, as
supplemented by  a Supplemental  Indenture,  dated as  of June     ,  1995  (the
"Supplemental  Indenture"), between the Company  and the Trustee. The Debentures
will be issued  only in  fully registered form  in denominations  of $1,000  and
integral  multiples thereof.  Principal, premium,  if any,  and interest  on the
Debentures will be  payable at the  corporate trust office  of Bank of  Montreal
Trust Company in New York, New York.

    Interest  on the Debentures will  accrue at the rate  of     % per annum and
will be payable semiannually on June 15 and December 15 of each year, commencing
December 15, 1995,  to the holders  of record of  Debentures on the  June 1  and
December 1 next preceding such interest payment date. Interest on the Debentures
will  accrue from the most recent date to which interest has been paid or, if no
interest has been paid, from the original date of issuance.

CONVERSION

    The Debentures will be convertible at their principal amount or any  portion
thereof  that is an integral  multiple of $1,000 at  any time prior to maturity,
subject to prior redemption at the Company's option on or after June 15, 1998 or
purchase by the Company  at the holder's  option in the event  of any Change  in
Control (as hereinafter defined), into shares of Common Stock, at the conversion
price  set  forth on  the  front cover  page  hereof, subject  to  adjustment as
described below. The Company will not be required to issue fractional shares  of
Common Stock, but will pay a cash adjustment in lieu thereof. In the case of any
Debenture  or  portion thereof  called  for redemption,  conversion  rights will
expire at the close  of business on the  business day immediately preceding  the
redemption  date. Interest  accrued shall not  be paid  on converted Debentures;
PROVIDED, HOWEVER, that if  any Debenture is called  for redemption on June  15,
1998, and such Debenture is surrendered for conversion at any time during the 10
business  days  immediately preceding  the date  fixed for  redemption, interest
shall accrue on such Debenture through  the date fixed for redemption and  shall
be  payable on such redemption date to  the person who surrenders such Debenture
for conversion. If any Debenture not called for redemption is converted  between
a  record date  for the  payment of  interest and  the next  succeeding interest
payment date, such Debenture must be accompanied by funds equal to the  interest
payable  on such  interest payment  date on  the principal  amount so converted.
(Section 2.4.)

    The conversion price is subject  to adjustment in certain events,  including
(a)   the  subdivision,   combination  or  reclassification   of  the  Company's
outstanding Common Stock, (b) the issuance by  the Company of Common Stock as  a
dividend  or distribution  on the  Common Stock, (c)  the issuance  of rights or
warrants to  all holders  of Common  Stock entitling  them to  subscribe for  or
purchase  shares of Common Stock (or securities convertible into or exchangeable
for Common Stock) at a price per share (or having a conversion or exercise price
per share) less than  the current market price  (as defined in the  Supplemental
Indenture)  of the Common Stock on the  record date, and (d) the distribution by
the Company to all holders of Common Stock of shares of capital stock other than
Common Stock, debt securities or assets or rights or warrants to purchase assets
or securities of the Company (excluding  the rights and warrants referred to  in
clause (c) and

                                      S-13
<PAGE>
cash  dividends  or  other  cash  distributions  from  consolidated  current net
earnings or earned surplus  or dividends payable in  Common Stock but  including
Extraordinary  Cash Dividends).  In the Supplemental  Indenture, "current market
price" is defined as the average of  the last reported sale price of the  Common
Stock  on the New York Stock Exchange for 30 consecutive trading days commencing
45 trading days before the date in question. There will be no upward  adjustment
in  the  conversion price  except  in the  event of  a  reverse stock  split. No
adjustment of  the  conversion price  will  be required  to  be made  until  the
cumulative  adjustments require an  increase or decrease  of at least  1% in the
conversion price as last adjusted. (Section 2.4.)

    Certain adjustments  to  the  conversion  price  to  reflect  the  Company's
issuance  of certain rights, warrants,  evidences of indebtedness, securities or
other assets to holders of Common Stock may result in constructive distributions
taxable as dividends to U.S. holders of the Debentures. Similarly, if instead of
adjusting the conversion price  upon such issuance, the  Company elects at  such
time to alter the consideration receivable by the holders of the Debentures upon
conversion  to include the  assets such holders  would have been  entitled to if
conversion had  occurred  prior  to  the record  date  for  such  issuance,  the
alteration may result in constructive distributions taxable as dividends to U.S.
holders of the Debentures.

    Subject  to any applicable right of the holders upon a Change in Control, in
case of  any  reclassification  (excluding those  referred  to  above),  merger,
consolidation,  sale or conveyance by the Company of all or substantially all of
the Company's assets as  an entirety, the holder  of each outstanding  Debenture
shall  have the right to convert such Debenture only into the kind and amount of
shares of stock and other securities and property (including cash) receivable in
such transaction by a holder of the number of shares of Common Stock into  which
such  Debenture was convertible  immediately prior to the  effective date of the
transaction.

REDEMPTION

    The Debentures will  be redeemable, in  whole or in  part, at the  Company's
option  on not less than 30, nor more than 60, days' prior notice to each holder
of Debentures to  be redeemed, at  any time on  or after June  15, 1998, at  the
redemption  prices (expressed as percentages of  the principal amount) set forth
below, plus accrued  and unpaid  interest to  the redemption  date, if  redeemed
during the 12-month period beginning June 15 of the calendar years indicated:

<TABLE>
<CAPTION>
                      YEAR                         REDEMPTION PRICE
- ------------------------------------------------  -------------------
<S>                                               <C>
1998............................................               %
1999............................................               %
2000............................................               %
2001............................................               %
2002............................................               %
2003............................................               %
</TABLE>

and, on or after June 15, 2004, at 100% of principal amount. (Section 2.5.)

    If less than all the Debentures are to be redeemed, the Trustee shall select
the  Debentures or  portions thereof  to be redeemed  by any  method the Trustee
deems fair and appropriate. (Section 10.3 of the Indenture.) There is no sinking
fund for the Debentures.

RANKING

    The Debentures will constitute senior  unsecured obligations of the  Company
and  will rank  PARI PASSU  in right  of payment  to the  Company's other senior
unsecured indebtedness. As of the date  hereof, the Company had no other  senior
unsecured  indebtedness. The Company is a  holding company and, accordingly, the
Debentures  will  be  effectively  subordinated  to  all  existing  and   future
liabilities  of the Company's operating  subsidiaries, including Alaska Airlines
and Horizon.  As  of  March 31,  1995,  the  long-term debt  and  capital  lease
obligations  of  Alaska Airlines  and of  Horizon were  $438.0 million  and $3.6
million, respectively.

PURCHASE OF DEBENTURES UPON CHANGE IN CONTROL

    In the event of any Change in  Control, each holder will have the right,  at
the  holder's option, subject to  the terms and conditions  of the Indenture, to
require  the   Company   to   purchase   all  or   any   part   (provided   that

                                      S-14
<PAGE>
the  principal amount  must be  $1,000 or an  integral multiple  thereof) of the
holder's Debentures on the date that is 35 business days after the occurrence of
such Change  in  Control (the  "Change  in Control  Purchase  Date") at  a  cash
purchase  price (the "Change  in Control Purchase  Price") equal to  100% of the
principal amount thereof plus accrued and unpaid interest, if any, to the Change
in Control Purchase Date. (Section 2.6.)

    Within 15 business days after the Change in Control, the Company shall  mail
to  the Trustee,  who shall  mail to  each holder  (and to  beneficial owners as
required by applicable  law), a notice  regarding the Change  in Control,  which
notice  shall state, among other things: (a)  the date of such Change in Control
and, briefly, the events causing  such Change in Control,  (b) the last date  on
which  the Change  in Control Purchase  Notice (as hereinafter  defined) must be
given, (c)  the Change  in Control  Purchase  Date, (d)  the Change  in  Control
Purchase  Price, (e) the name and address of the Paying Agent and the Conversion
Agent, (f) the conversion rate and any adjustments thereto, (g) that  Debentures
with respect to which a Change in Control Purchase Notice is given by the holder
may  be converted  into shares  of Common  Stock only  if the  Change in Control
Purchase Notice  has  been  withdrawn  in  accordance  with  the  terms  of  the
Indenture, (h) the procedures that holders must follow to exercise these rights,
(i)  the procedure for withdrawing a Change in Control Purchase Notice, (j) that
holders who want to convert Debentures must satisfy the procedural  requirements
set  forth in  paragraph 3  of the Debentures,  and (k)  briefly, the conversion
rights of holders of the Debentures. (Section 2.6.)

    To exercise the purchase  right, the holder must  deliver written notice  of
the exercise of such right (a "Change in Control Purchase Notice") to the Paying
Agent  or an office or agency maintained by  the Company for such purpose in the
Borough of Manhattan,  The City  of New  York, New York  prior to  the close  of
business  on the Change in  Control Purchase Date. (Section  2.6.) The Change in
Control  Purchase  Notice  shall  state  (a)  the  certificate  numbers  of  the
Debentures  to be delivered by  the holder thereof for  purchase by the Company;
(b) the portion  of the principal  amount of Debentures  to be purchased,  which
portion  must  be $1,000  or an  integral  multiple thereof;  and (c)  that such
Debentures are  to  be purchased  by  the  Company pursuant  to  the  applicable
provisions of the Debentures. (Section 2.6.)

    Any  Change in Control Purchase  Notice may be withdrawn  by the holder by a
written notice  of withdrawal  delivered to  the Paying  Agent or  to any  other
office  or agency mandated by the Company for such purpose prior to the close of
business on the Change in Control Purchase Date. The notice of withdrawal  shall
state  the principal amount and the certificate  numbers of the Debentures as to
which the  withdrawal notice  relates and  the principal  amount, if  any,  that
remains subject to a Change in Control Purchase Notice. (Section 2.6.)

    Payment  of the Change in Control Purchase Price for a Debenture for which a
Change in  Control Purchase  Notice  has been  delivered  and not  withdrawn  is
conditioned   on  delivery  of  such  Debenture  (together  with  the  necessary
endorsements) to  the Paying  Agent or  an office  or agency  maintained by  the
Company  for such purpose in the Borough of Manhattan, The City of New York, New
York at any time (whether prior to,  on or after the Change in Control  Purchase
Date)  after the delivery of such Change  in Control Purchase Notice. Payment of
the Change in Control  Purchase Price for such  Debenture will be made  promptly
following  the later  of the  Change in  Control Purchase  Date and  the time of
delivery of such Debenture.  If the Paying Agent  holds, in accordance with  the
terms  of  the Supplemental  Indenture, money  sufficient to  pay the  Change in
Control Purchase  Price of  such Debenture  on the  business day  following  the
Change  in  Control Purchase  Date, then,  on  and after  the Change  in Control
Purchase Date, such Debenture will cease to be outstanding and interest on  such
Debenture  will cease  to accrue and  will be  deemed paid, whether  or not such
Debenture is delivered to the Paying Agent,  and all other rights of the  holder
shall  terminate (other than the right to receive the Change in Control Purchase
Price upon delivery of such Debenture). (Section 2.6.)

    Under the Supplemental Indenture,  a "Change in Control"  of the Company  is
deemed  to have occurred at such time as (a) any "person" or "group" (within the
meaning of Section 13(d)(3) or 14(d)(2) of the Securities Exchange Act of  1934,
as  amended (the "Exchange Act")) other than  the Company, any subsidiary of the
Company or  any employee  benefit plan  or stock  ownership plan  of either  the
Company or any

                                      S-15
<PAGE>
subsidiary  of the Company, (i) files a Schedule 13D or 14D-1 under the Exchange
Act (or any successor schedule, form or report) disclosing that such person  has
become  the "beneficial  owner" of  50% or more  of the  Company's capital stock
having  the  power  to  vote  in  the  election  of  directors  under   ordinary
circumstances ("Voting Stock"), with certain exceptions, (ii) acquires more than
50%  of the Company's assets,  or (iii) acquires more than  50% of the assets or
Voting Stock of any subsidiary (A) the  total assets of which exceed 50% of  the
consolidated  total  assets  of the  Company  and  its subsidiaries  or  (B) the
operating income  of which  exceeded  50% of  the  average of  the  consolidated
operating  income of  the Company and  its subsidiaries for  the Company's three
most recently completed  fiscal years,  or (b)  there shall  be consummated  any
consolidation  or merger  of the  Company (i)  in which  the Company  is not the
resulting or surviving corporation or (ii) pursuant to which any Voting Stock of
the Company would be converted into cash, securities or other property, in  each
case other than a consolidation or merger of the Company in which the holders of
such Voting Stock immediately prior to the consolidation or merger have at least
a  majority of  the Voting  Stock, directly or  indirectly, of  the resulting or
surviving corporation immediately  after the consolidation  or merger.  (Section
1.2.)  The  Supplemental  Indenture  does  not  permit  the  Company's  Board of
Directors to waive the Company's obligation to purchase Debentures at a holder's
option in the event of a Change in Control of the Company. (Section 2.6.)

    The Company shall  comply with the  provisions of Rule  13e-4 and any  other
tender  offer rules under the Exchange Act that may then be applicable, and will
file a Schedule 13E-4  or any other schedule  required thereunder in  connection
with  any  offer by  the Company  to purchase  Debentures at  the option  of the
holders thereof upon a Change in  Control. (Section 2.6.) The Change in  Control
purchase  feature  of  the Debentures  may  in certain  circumstances  make more
difficult or discourage  a takeover  of the Company  and, thus,  the removal  of
incumbent management.

    If  a Change in  Control Offer is made,  there can be  no assurance that the
Company would have funds sufficient to pay the Change in Control Purchase  Price
for  all the Debentures that might be delivered by holders of Debentures seeking
to exercise the purchase right. In  addition, the Company's ability to  purchase
Debentures  with cash may be limited by the terms of its then existing borrowing
arrangements. The Company's ability to purchase Debentures with cash may also be
limited by the terms of its  subsidiaries' then existing debt agreements due  to
dividend restrictions, since the Company's source of funds for any such purchase
will  be primarily from  dividends and other payments  from its subsidiaries. No
Debentures may be purchased pursuant to the provisions described above if  there
has  occurred and is  continuing an Event of  Default described under "--Certain
Covenants and Events  of Default" in  this Prospectus Supplement  (other than  a
default  in the payment of the Change  in Control Purchase Price with respect to
such Debentures).

    Notwithstanding the foregoing, the  provisions described above with  respect
to  a Change in Control  will not prevent a  takeover or recapitalization of the
Company  that  would  otherwise  comply  with  the  provisions  described  under
"Description  of Convertible  Debt Securities--Consolidation, Merger  or Sale by
the Issuer" in the accompanying Prospectus.

DEFEASANCE

    The  provisions   described   under   "Description   of   Convertible   Debt
Securities--Covenant   Defeasance"  in  the   accompanying  Prospectus  are  not
applicable to the Debentures.

CERTAIN COVENANTS AND EVENTS OF DEFAULT

    The provisions  of the  Indenture  that are  described in  the  accompanying
Prospectus   under  "Description   of  Convertible   Debt  Securities--General,"
"--Consolidation, Merger or Sale  by the Issuer,"  "--Events of Default,  Notice
and  Certain  Rights  on  Default" and  "--Payment,  Registration,  Transfer and
Exchange" will apply to the Debentures. The provisions of the Indenture that are
described in the accompanying Prospectus under "Description of Convertible  Debt
Securities--Modification  of the Indentures" will  also apply to the Debentures;
PROVIDED, HOWEVER,  that no  modification  or amendment  of the  Indenture  may,
without  the  consent  of  the holder  of  each  outstanding  Debenture affected
thereby, make any change (a) to the  definition of the term "Change in  Control"
or (b) that adversely affects the right to convert, or the conversion price for,
any Debenture.

                                      S-16
<PAGE>
THE TRUSTEE

    Harris  Trust and Savings Bank  will be the Trustee  under the Indenture for
the Debentures. An affiliate of Harris Trust and Savings Bank serves as  trustee
with  respect to  the Company's 7  3/4% Convertible  Subordinated Debentures due
2005-2010 and the Company's  7 1/4% zero  coupon convertible subordinated  notes
due 2006.

                                      S-17
<PAGE>
                                  UNDERWRITING

    Subject  to the terms and conditions set  forth in a purchase agreement (the
"Purchase Agreement") between  the Company and  the several underwriters  listed
below  (the "Underwriters"), the Company has agreed to sell to the Underwriters,
and the Underwriters  have severally agreed  to purchase from  the Company,  the
respective  principal amounts of  the Debentures set  forth opposite their names
below. The Purchase Agreement provides that the obligations of the  Underwriters
are  subject to certain  conditions precedent and that  the Underwriters will be
obligated to purchase all the Debentures if any are purchased.

<TABLE>
<CAPTION>
                                                                                  PRINCIPAL
          UNDERWRITER                                                               AMOUNT
                                                                                --------------
<S>                                                                             <C>
Merrill Lynch, Pierce, Fenner & Smith
          Incorporated........................................................  $
Goldman, Sachs & Co...........................................................
                                                                                --------------
          Total...............................................................  $  100,000,000
                                                                                --------------
                                                                                --------------
</TABLE>

    The Underwriters have  advised the  Company that they  propose initially  to
offer the Debentures to the public at the public offering price set forth on the
cover  page of this Prospectus Supplement, and  to certain dealers at such price
less a  concession not  in  excess of       % of  the  principal amount  of  the
Debentures. The Underwriters may allow, and such dealers may reallow, a discount
not in excess of    % of the principal amount of the Debentures to certain other
dealers.   After  the  initial  public  offering,  the  public  offering  price,
concession and discount may be changed.

    The Company has granted the Underwriters an option, exercisable for 30  days
after  the date of this  Prospectus Supplement, to purchase  up to an additional
$15,000,000 principal amount of Debentures to cover over-allotments, if any,  at
the initial public offering price less the underwriting discount.

    The  Company  has been  advised by  the  Underwriters that  the Underwriters
presently intend to  make a market  in the Debentures  offered hereby;  however,
they  are not obligated to  do so. Any market making  may be discontinued at any
time, and  there can  be  no assurance  that an  active  public market  for  the
Debentures will develop.

    The Company has agreed not to sell to any person other than the Underwriters
any  shares of  Common Stock or  securities convertible into  or exchangeable or
exercisable for Common Stock (other than (a) shares issuable upon conversion  of
the Debentures, (b) shares issuable upon the exercise or conversion of currently
outstanding  securities  of the  Company  and (c)  the  grant of  certain rights
pursuant to employee benefit plans) without the prior written consent of Merrill
Lynch, Pierce, Fenner & Smith Incorporated, on behalf of the Underwriters, for a
period of 90 days after the date of this Prospectus Supplement.

    The Company has agreed to indemnify the several Underwriters against certain
liabilities, including civil liabilities  under the Securities  Act of 1933,  as
amended.

    The  Underwriters, from time  to time, perform  investment banking and other
financial services  for  the  Company and  its  subsidiaries,  including  Alaska
Airlines and Horizon.

                                 LEGAL OPINIONS

    The  validity of the Debentures  offered hereby will be  passed upon for Air
Group by Perkins Coie, Seattle, Washington, and for the Underwriters by Shearman
& Sterling, New York, New York.

                                    EXPERTS

    The consolidated financial statements and schedule of Air Group at  December
31,  1994 and for each of the three years in the period ended December 31, 1994,
incorporated  by  reference  in  this  Prospectus  Supplement  and  the  related
Registration  Statement, have been  audited by Arthur  Andersen LLP, independent
public accountants, as indicated in their reports with respect thereto, and  are
incorporated  herein and therein in reliance upon  the authority of said firm as
experts in accounting and auditing in giving said reports.

                                      S-18


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