EXHIBIT 10.87


                              AMERICA WEST AIRLINES, INC.
                         4000 East Sky Harbor Boulevard
                             Phoenix, Arizona 85034


March 26, 1998

Mesa Airlines, Inc.
2325 East 30th Street
Farmington, New Mexico  87401

      Re:  Letter  Agreement concerning America West Express Service  Agreement,
           dated September 4, 1992, between America West Airlines, Inc. ("AWA"),
           and Mesa Airlines, Inc. ("Mesa"), as amended by the following: Letter
           Agreement, dated September 3, 1993, re: America West Express  Service
           Agreement;  Amendment to  Agreement between AWA and Mesa, dated March
           31, 1993;  Second  Amendment to the  Agreement  between AWA and Mesa,
           dated July 31, 1993;  Letter  Agreement, dated  October 5, 1993,  re:
           America West Express Service Agreement; Third Amendment to  Agreement
           between  AWA  and  Mesa,  dated October 7, 1993;  Third Amendment  to
           Agreement between AWA and Mesa, dated August, 1994; Letter Agreement,
           dated  March 31, 1994, re: America  West Express Code-Share Agreement
           Addendum; Letter  Agreement, dated August 16, 1994,  re: America West
           Express  Code-Share  Agreement  Addendum; and Fourth Amendment, dated
           October, 1994, to the  Agreement between AWA and Mesa  (collectively,
           the "AWA/Mesa Code Agreement")

Ladies and Gentlemen:

                  The  purpose  of this  letter  is to  establish  the terms and
conditions  pursuant to which America West Airlines,  Inc. ("AWA") is willing to
continue the code-share  relationship with Mesa Airlines, Inc. ("Mesa") pursuant
to the AWA/Mesa Code Agreement as amended, revised and superseded by this letter
(the  "Revised  AWA/Mesa  Code  Agreement").  If Mesa executes and delivers this
letter  agreement by 5:00 p.m.,  Phoenix time, on March 26, 1998,  AWA's default
notice  contained in AWA's  letter,  dated March 2, 1998,  to Mesa (the "Default
Notice") will hereby be rescinded.

                  After execution and delivery of this letter agreement, AWA and
Mesa shall proceed  diligently  and in good faith to negotiate and execute a new
code-share  agreement  to  replace  and  supersede  the  Revised  AWA/Mesa  Code
Agreement,  in a form  and  substance  acceptable  to AWA  and  Mesa  (the  "New
Agreement"). AWA will exclusively negotiate with Mesa to reach the New Agreement
through  April 30, 1998. If the New Agreement is not executed by April 30, 1998,
then AWA may proceed to negotiate  with other  carriers to provide  America West



                                                                  March 26, 1998
                                                                          Page 2

Express ("AWE") code share service. Commencing with the delivery of this letter,
the AWA/Mesa Code Agreement is amended, revised and superseded as follows:

                  1. Sections 2.01(a) and (b) of the AWA/Mesa Code Agreement are
revised  in their  entirety  to  provide  that  during  the term of the  Revised
AWA/Mesa  Code  Agreement,  Mesa shall  schedule  and operate AWE service in the
markets and, at a minimum,  with the  frequencies  listed on Schedule 1 attached
hereto.  If AWA establishes  its own America West Airlines  services to a market
listed on Schedule 1 and/or Mesa's performance standards for a market fall below
the  minimum levels  specified in  paragraph 11 of  this letter for [ * ]  (i.e.
[ * ] completion factor), then AWA, by [ * ] days' prior written notice to Mesa,
may  revise  Schedule 1 by  removing  that  market or  markets or  reducing  the
frequency of AWE service to that market and if the frequency  of AWE services is
reduced, AWA may specify which AWE flight is to be removed as AWE service.

                  2. Section 2.01(d) of the AWA/Mesa Code  Agreement is deleted.

                  3. Section  2.02(a) of the AWA/Mesa Code  Agreement is revised
in its entirety to require that the scheduled  air service  required in Sections
2.01(a) and (b) shall be  performed  by Mesa using  Beech  1900,  Dash 8, CRJ or
other aircraft approved by AWA.

                  4.  Section  3.05(c)(2)  of the  AWA/Mesa  Code  Agreement  is
revised  by  permitting  AWA to [ * ] by AWA to Mesa the  performance  penalties
established herein.

                  5. Section 3.07 of the AWA/Mesa Code Agreement is deleted.

                  6. Section  8.02(a) of the AWA/Mesa Code  Agreement is revised
to provide  that Mesa shall  provide to AWA on the 15th day and last day of each
calendar  month  status  reports  (on a form to be  provided  by AWA),  with all
necessary details and backup, on AWE's ontime performance and completion factor,
on a market-by-market basis during the prior 30 days.

                  7.  A new  Section  8.01(d)  is  added  to the  AWA/Mesa  Code
Agreement to provide that AWA shall have the right, during normal business hours
after  reasonable prior written notice to Mesa, to make any examination or audit
of Mesa's books and records related to AWE passengers and performance maintained
in connection  with the AWA/Mesa  relationship  created by the Revised  AWA/Mesa
Code  Agreement.  If such  examination  or audit  shall  disclose  that Mesa has
underpaid  any  sum due by  Mesa to AWA,  Mesa shall pay such sum to AWA  within
[ * ] after receipt of  written  demand from AWA.  If such  examination or audit
shall  disclose  that  Mesa has  overpaid  any sum due by Mesa to AWA, AWA shall
pay any  overpayment to  Mesa  within [ * ] after receipt of written demand from
Mesa.


                      " [CONFIDENTIAL PORTION DELETED AND
                            FILED SEPARATELY WITH THE
                      SECURITIES AND EXCHANGE COMMISSION] "


                                                                  March 26, 1998
                                                                          Page 3


                  8. Section  9.01(_) of the AWA/Mesa Code  Agreement is amended
in its entirety to provide that in addition to the remedies  provided in Section
9.01,  if during any [ * ] the [ * ] (excluding  [ * ]) of  published  scheduled
flights  for the [ * ] falls below [ * ], Mesa shall pay to AWA the sum of [ * ]
for [ * ] the [ * ] is [ * ]. The  performance  penalty  shall be paid to AWA by
Mesa within [ * ] days after the expiration of each [ * ]. AWA shall be entitled
to offset any  performance  penalties  not paid timely  against  sums  otherwise
payable to Mesa pursuant to Section 3.05(c)(2).

                  9.  Section  9.01 is revised by  deleting  subsection  (b) and
revising  subsection  (a) in its  entirety  to provide  that the  AWA/Mesa  Code
Agreement became effective on October 1, 1992 and shall expire on June 30, 1998,
unless this Agreement is terminated at an earlier date as permitted by the other
sections of the Revised  AWA/Mesa Code Agreement.  If the Revised  AWA/Mesa Code
Agreement is terminated,  then AWA and Mesa shall continue to perform the duties
and obligations in the manner  prescribed by the Revised AWA/Mesa Code Agreement
to and including the effective date of the termination.

                  Commencing  on May  1,  1998,  in  addition  to the  revisions
provided in  Paragraphs  1-9,  above,  the AWA/Mesa Code Share  Agreement  shall
further be amended, revised and superseded as follows:

                  The  first  sentence  of  Section  8.01 of the  AWA/Mesa  Code
Agreement  is revised in its entirety to provide that Mesa shall pay to AWA: (i)
in  consideration  of the [ * ]  provided  to Mesa,  the [ * ], [ * ] and  other
considerations  provided  by AWA to Mesa,  Mesa shall pay to AWA the [ * ] to be
provided by AWA, which for 1998 shall be the [ * ] on all AWE's flights operated
by Mesa;  (ii) a [ * ];  (iii) an [ * ] for [ * ] in [ * ]; and (iv) a [ * ] for
[ * ] equal to [ * ] of [ * ] given to AWE  passengers  who are denied  boarding
by Mesa on AWE flights  (collectively,  the "Service  Charges").  After  receipt
of written request, AWA shall provide Mesa with  backup  information  supporting
the [ * ] of the [ * ] for above.


                      " [CONFIDENTIAL PORTION DELETED AND
                            FILED SEPARATELY WITH THE
                      SECURITIES AND EXCHANGE COMMISSION] "


                                                                  March 26, 1998
                                                                          Page 4


                  Please  acknowledge your agreement to the terms of this letter
and the amendment,  modification and revisions of the AWA/Mesa Code Agreement as
provided herein. By your execution of this letter you represent and warrant that
you have the authority and power to bind Mesa to the terms of this letter.

                                   Sincerely,

                                   AMERICA WEST AIRLINES, INC.


                                   By /s/ Stephen L. Johnston
                                     ------------------------
                                     Stephen L. Johnston
                                     Senior Vice President - Corporate
                                     Affairs



Acknowledged, accepted and agreed to this 26 day of March, 1998.
                                         ----     
MESA AIRLINES, INC.

By /s/ Robert C. Dynan
  --------------------
    Its  President
       ---------------





                               SCHEDULE ONE
                             Minimum Frequency

                                      Frequencies

Market                          Weekdays         Weekends           EQP
- ------                          --------         --------           ---
Aspen, CO (ASE)                  [ * ]            [ * ]             DH8
Bullhead City, AZ (IFP)          [ * ]            [ * ]             BE1
Des Moines, IA (DSM)             [ * ]            [ * ]             CRJ
Durango, CO (DRO)                [ * ]            [ * ]             BE1
Farmington, NM (FMN)             [ * ]            [ * ]             BE1
Flagstaff, AZ (FLG)              [ * ]            [ * ]             BE1
Fort Huachuca, AZ (FHU)          [ * ]            [ * ]             BE1
Fresno, CA (FAT)                 [ * ]            [ * ]             CRJ
Gallup, NM (GUP)                 [ * ]            [ * ]             BE1
Grand Junction, CO (GJT)         [ * ]            [ * ]             BE1
Kingman, AZ (IGM)                [ * ]            [ * ]             BE1
Lake Havasu, AZ (HII)            [ * ]            [ * ]             BE1
Montrose, CO (MTJ)               [ * ]            [ * ]             BE1
Palm Springs, CA (PSP)           [ * ]            [ * ]             CRJ
Prescott, AZ (PRC)               [ * ]            [ * ]             BE1
Santa Barbara, CA (SBA)          [ * ]            [ * ]             CRJ
Telluride, CO (TEX)              [ * ]            [ * ]             BE1
Yuma, AZ (YUM)                   [ * ]            [ * ]             BE1
- --------------------------- ----------------- --------------- ----------------
TOTAL                            [ * ]            [ * ]


                      " [CONFIDENTIAL PORTION DELETED AND
                            FILED SEPARATELY WITH THE
                      SECURITIES AND EXCHANGE COMMISSION] "