Document:

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                                                                    Exhibit 10.7
                                 THIRD AMENDMENT

This Third Amendment is entered and made as of October 6, 2000 (the "Third
Amendment") as an amendment to the Agreement dated as of October 15, 1990, by
and between US Airways, Inc. ("US Airways") and Air Midwest, Inc. ("Contractor")
(the "Agreement").

                                   WITNESSETH:

WHEREAS, US Airways and Contractor have entered into the Agreement; and

WHEREAS, on August 6, 1991, US Airways and Contractor amended the Agreement in
certain respects ("First Amendment"); and

WHEREAS, in February of 1993, the parties further amended the Agreement in
certain respects ("Second Amendment"); and

WHEREAS, US Airways and Contractor desire to further amend certain provisions of
the Agreement;

NOW THEREFORE, in consideration of the premises and mutual covenants hereinafter
set forth and for good and valuable consideration, the receipt and sufficiency
of which is acknowledged, US Airways and Contractor hereby agree as follows:

      1.    The first sentence of Section 9.01 (a) is hereby amended by striking
            the language contained therein and substituting the following in
            lieu thereof:

              "This Agreement will become effective October 15th 1990 and will
              continue in effect thereafter through October 15, 2005, unless it
              is terminated at an earlier date pursuant to one or more of the
              provisions of this Article 9."

      2.    Section 9.02(h) is hereby deleted in its entirety and existing
            Section 9.02 (i) is renumbered as Section 9.02(h).

      3.    Except as amended hereby, the Service Agreement shall remain in full
            force and effect.

      IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
      by their duly authorized representatives as of the day and year first
      above written.

      AIR MIDWEST, INC.                               US AIRWAYS, INC.

        /S/ Jonathan Ornstein                      /S/ Thomas M. Hanley
     --------------------------                  ---------------------------
     By:      Jonathan Ornstein                  By:      Thomas M. Hanley
     Title:   Chairman                           Title:   Vice President
                                                          US Airways Express<PAGE>
                                                                    Exhibit 10.8
                                FOURTH AMENDMENT

This Fourth Amendment is entered and made as of March 5, 2001 (the "Fourth
Amendment") as an amendment to the Agreement dated as of October 15, 1990, by
and between US Airways, Inc. ("US Airways") and Air Midwest, Inc. ("Contractor")
(the "Agreement").

                                   WITNESSETH:

WHEREAS, US Airways and Contractor have entered into the Agreement; and

WHEREAS, in August 6, 1991, the parties further amended the Agreement in certain
respects ("First Amendment"); and

WHEREAS, in February of 1993, the parties further amended the Agreement in
certain respects ("Second Amendment"); and

WHEREAS, on October 6, 2000, the parties further amended the Agreement in
certain respects ("Third Amendment");

NOW THEREFORE, in consideration of the premises and mutual covenants hereinafter
set forth and for good and valuable consideration, the receipt and sufficiency
of which is acknowledged, US Airways and Contractor hereby agree as follows:

      1.    Section 11.01 of the Agreement is hereby amended by inserting a
            subsection "(a)" before the word "Contractor" in the first paragraph
            of such Section.

      2.    Section 11.01 of the Agreement is hereby amended by inserting a new
            subsection "(b)" at the end of the first paragraph as follows:

            "(b)Effective March 5, 2001, US Airways hereby grants to Contractor
            for a period of one year, the right to conduct operations described
            in Section 2.01 above, as amended, and any additional operations
            undertaken by subsequent amendment hereto under the trademark "US
            Airways Express" on behalf of Midwest Express Airlines, subject to
            all of the terms and conditions of Article 11 of the Agreement." Air
            Midwest Airlines flights d/b/a US Airways Express which operate
            between Kansas City to the airports listed in Section 2.01 will be
            permitted to carry the YX code when connecting to Midwest Express
            Airlines flights from Kansas City to the airports listed below. Any
            one or more of the airports listed is subject to change at the sole
            discretion of US Airways, provided that US Airways provides 60 days
            notice to Air Midwest:

                  [***]
      3.    Except as amended hereby, the Agreement shall remain in full force
            and effect.

IN WITNESS WHEREOF, the parties have caused this Agreement to be executed by
their duly authorized representatives as of the day and year first above
written.

        AIR MIDWEST, INC.                            US AIRWAYS, INC.

        /S/ Greg Stephens                          /S/ Thomas M. Hanley
     --------------------------                 ---------------------------
     By:      Greg Stephens                     By:      Thomas M. Hanley
     Title:   President                         Title:   Vice President
                                                         Express Division<PAGE>
                                                                   Exhibit 10.10

                          FIRST AMENDMENT TO CODE SHARE
                          AND REVENUE SHARING AGREEMENT

This FIRST AMENDMENT TO CODE SHARE AND REVENUE SHARING AGREEMENT (this "First
Amendment") is dated to be effective the 27th day of April, 2001 (the "Effective
Date"), between AMERICA WEST AIRLINES, INC., a Delaware corporation ("AWA"), and
MESA AIRLINES, INC., a Nevada corporation ("MESA").

                                    RECITALS:

A. AWA and MESA have entered into a Code Share and Revenue Sharing Agreement,
entered into as of March 20, 2001, to be effective retroactive to February 1,
2001 (the "Code Share Agreement"), to provide scheduled air transportation
services as America West Express. All capitalized terms used herein but not
defined shall have the meaning given to such terms in the Code Share Agreement.

B. AWA and MESA desire to amend the Code Share Agreement to provide additional
time for MESA to execute the Aircraft Contract.

NOW, THEREFORE, in consideration of the recitals and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, AWA
and MESA agree as follows:

                                   AMENDMENTS

1. The parties agree that Paragraph 1 of the Code Share Agreement shall be
amended in its entirety as follows:

      Effectiveness. This Agreement replaces the Original Agreement effective
      upon the date (the "Effective Date") that MESA executes a binding
      agreement to acquire the CRJ Aircraft required to be provided by MESA
      pursuant to Section 2.2.2 of this Agreement (the "Aircraft Contract").
      MESA shall provide AWA with written notice of the date the Aircraft
      Contract is executed together with copies of the Aircraft Contract. On the
      date of execution of the Aircraft Contract, all of the terms and
      provisions of this Agreement shall be effective retroactive to the
      Contract Date. On the Effective Date, the Original Agreement shall be
      terminated in its entirety. All sums payable pursuant to Section 6 of the
      Original Agreement between the Contract Date and Effective Date shall be
      recalculated pursuant to the terms of Section 7 of this Agreement, and
      AWA, subject to the rights regarding disputed amounts contained in Section
      7.8, shall pay additional and undisputed sums payable within 30 days after
      receipt of a written invoice for such recalculation. Until the Effective
      Date, AWA and MESA shall continue to perform pursuant to the Original
      Agreement. If the Aircraft Contract is not executed by June 1, 2001, then
      this Agreement shall automatically terminate and the terms and conditions
      of the Original Agreement shall remain in full force and effect.
      Simultaneously with the execution of this Agreement, AWA and MESA shall
      enter into an amendment to the Original Agreement providing for the
      addition of 3 CRJs under the Original Agreement if this Agreement is
      terminated pursuant to this Section.
<PAGE>
      As of the Contract Date, AWA and MESA dispute certain amounts that are
      payable between AWA and MESA under the Original Agreement (the "Disputed
      Amounts"). MESA and AWA shall continue to work to resolve their respective
      obligations concerning the Disputed Amounts pursuant to the terms of the
      Original Agreement. This is a new and separate agreement from the Original
      Agreement. The terms of this Agreement shall not be used by either MESA or
      AWA to determine or interpret the respective payment obligations of the
      parties for the Disputed Amounts. The respective obligations for the
      Disputed Amounts and other matters and disputes arising under the Original
      Agreement prior to the Contract Date shall be resolved pursuant to the
      terms, covenants, rights and remedies of the Original Agreement, shall not
      affect the rights, duties and obligations of AWA or MESA under this
      Agreement and shall not permit AWA or MESA to exercise any remedies under
      this Agreement. The intent of AWA and MESA is to resolve any disputes
      concerning the Disputed Amounts or any other matters and disputes under
      the Original Agreement and not pursuant to this Agreement.

                                  MISCELLANEOUS

2. Effect. Except as otherwise set forth in this First Amendment, the Code Share
Agreement shall remain in full force and effect as originally set forth.

3. Counterparts. This First Amendment may be executed in counterparts, all of
which when taken together shall be one and the same document.

4. Entire Agreement: This First Amendment constitutes the entire agreement
between the parties with respect to the subject matter hereof and supersedes all
prior understandings with respect thereto.

     AWA:                                  AMERICA WEST AIRLINES, INC.,
                                           A Delaware corporation

                                           By: /S/ Andrew Nocella
                                               -------------------------------

     MESA:                                 MESA AIRLINES, INC.,
                                           A Nevada corporation

                                           By:  /S/ Jonathan Ornstein
                                               ---------------------------------
                                                    Jonathan G. Ornstein
                                                    Chief Executive Office

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