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                                                                     EXHIBIT 4.1

                               PURCHASE AGREEMENT

                                   Dated as of

                                October 26, 2000

                                     BETWEEN

                                US AIRWAYS, INC.

                                       AND

                       AIRBUS INDUSTRIE FINANCIAL SERVICES

                CLASS C PASS THROUGH CERTIFICATES, SERIES 2000-3

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                                US AIRWAYS, INC.

                CLASS C PASS THROUGH CERTIFICATES, SERIES 2000-3

                               PURCHASE AGREEMENT

                                                                October 26, 2000

Airbus Industrie Financial Services
2nd Floor
George's Dock House
International Financial Services Centre
Dublin 1, Ireland

Dear Sirs:

            US AIRWAYS, INC., a Delaware corporation (the "Company"), proposes
that State Street Bank and Trust Company of Connecticut, National Association, a
national banking association, acting not in its individual capacity but solely
as pass through trustee (the "Trustee") under the Pass Through Trust Agreement
referred to below, issue and sell to Airbus Industrie Financial Services, a
corporation formed under the laws of Ireland ("AIFS" or "Purchaser"), its Class
C Pass Through Certificates, Series 2000-3 in the aggregate principal amount and
with the interest rate and final expected distribution date set forth on
Schedule I hereto (the "Class C Certificates") on the terms and conditions
stated herein.

            The Certificates will be issued pursuant to the Pass Through Trust
Agreement dated as of October 5, 2000 (the "Basic Agreement"), between the
Company and the Trustee, as supplemented with respect to the Class C
Certificates by a separate Pass Through Trust Supplement to be dated as of the
Closing Date (as defined below) (the "Series C Supplement"), between the Company
and the Trustee (the Basic Agreement as supplemented by the Series C Supplement
being referred to herein as the "Pass Through Agreement" and the trust created
thereby being referred to as the "Class C Trust").

            The cash proceeds of the offering of Class C Certificates will be
paid to First Security Bank, National Association, a national banking
association, as escrow agent (the "Escrow Agent"), under an Escrow and Paying
Agent Agreement among the Escrow Agent, AIFS, the Trustee and State Street Bank
and Trust Company, as paying agent (the "Paying Agent"), for the benefit of the
holders of the Class C Certificates (the "Escrow Agreement"). The Escrow Agent
will deposit such cash proceeds (each, a "Deposit") with ABN AMRO Bank N.V.,
Chicago Branch (the "Depositary"), in accordance with the Deposit Agreement
between the Escrow Agent and the Depositary (each, a "Deposit Agreement"), and
will withdraw Deposits upon request to allow the Trustee to purchase Equipment
Notes from time to time pursuant to a Note Purchase Agreement to be dated as of
the Closing Date (the "Note Purchase Agreement") among the Company, State Street
Bank and Trust Company of Connecticut, National Association, a national banking
association, as Trustee, as Subordination Agent (as hereinafter defined) and as
Paying Agent, and the Escrow Agent. The Escrow Agent will issue receipts to be
attached to Class C Certificates ("Escrow Receipts") representing each holder's
fractional undivided interest in amounts deposited with such Escrow Agent and
will pay to such holders through the related Paying Agent interest accrued on
the Deposits and received by such Paying Agent pursuant to the related Deposit
Agreement at a rate per annum equal to the interest rate applicable to the
corresponding Certificates.


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            Certain amounts of interest payable on the Class C Certificates will
be entitled to the benefits of a liquidity facility. Morgan Stanley Capital
Services, Inc., a Delaware corporation (the "Liquidity Provider"), will enter
into a revolving credit agreement with respect to the Class C Trust (the
"Liquidity Facility") to be dated as of the Closing Date for the benefit of the
holders of the Class C Certificates. The Liquidity Provider and the holders of
the Class C Certificates (as well as the Company's Class G Pass Through
Certificates, Series 2000-3 (the "Class G Certificates") and together with the
Class C Certificates, the "Pass Through Certificates") will be entitled to the
benefits of an Intercreditor Agreement to be dated as of the Closing Date (the
"Intercreditor Agreement") among the Trustees, State Street Bank and Trust
Company of Connecticut, National Association, as subordination agent and trustee
thereunder (the "Subordination Agent"), the Policy Provider and the Liquidity
Provider.

            The Class C Certificates will be offered and sold to the Purchaser
without being registered under the Securities Act of 1933, as amended (the
"Securities Act"), in reliance upon an exemption therefrom. The Company has
prepared an offering memorandum dated the date hereof (the "Offering
Memorandum") setting forth information concerning the Company and the Class C
Certificates. Copies of the Offering Memorandum have been delivered by the
Company to the Purchaser pursuant to the terms of this Agreement. Any references
herein to the Offering Memorandum shall be deemed to include all amendments and
supplements thereto, unless otherwise noted. The Company hereby confirms that it
has authorized the use of the Offering Memorandum in connection with the resale
of the Class C Certificates by the Purchaser.

            Holders of the Class C Certificates (including the Purchaser and
their direct and indirect transferees) will be entitled to the benefits of a
Registration Agreement, substantially in the form attached hereto as Annex A
(the "Registration Agreement") on the terms and to the extent specifically set
forth therein, pursuant to which the Company will agree to file, upon receipt of
a written demand notice by AIFS (and no other Holder), as contemplated by the
Registration Agreement, with the Securities and Exchange Commission (the
"Commission") (i) up to two (2) registration statements under the Securities Act
(each an "Exchange Offer Registration Statement") registering an issue of
Certificates (the "Exchange Certificates") which are identical in all material
respects to the Class C Certificates (except that the Exchange Certificates will
not contain terms with respect to transfer restrictions) and (ii) under certain
circumstances, a shelf registration statement pursuant to Rule 415 under the
Securities Act (the "Shelf Registration Statement").

            As used herein, the term Offering Memorandum shall include in each
case the documents, if any, incorporated by reference therein. The terms
"supplement", "amendment", and "amend" as used herein with respect to the
Offering Memorandum shall include all documents deemed to be incorporated by
reference in the Offering Memorandum that are filed with the Commission pursuant
to the Exchange Act after the issue date of such Offering Memorandum and on or
prior to the completion of the offering.


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            Capitalized terms not otherwise defined in this Agreement shall have
the meanings specified therefor in the Pass Through Agreement, the Note Purchase
Agreement or the Intercreditor Agreement referred to in the Pass Through
Agreement; provided that, as used in this Agreement, the term "Operative
Documents" shall mean the Purchase Agreement, the Deposit Agreement, the Escrow
Agreement, the Intercreditor Agreement, the Liquidity Facility, the Indentures,
the Leases, the Note Purchase Agreement, the Participation Agreements, the Trust
Agreements, the Pass Through Agreement, the Pass Through Certificates, the
Equipment Notes and the Registration Agreement.

            As used in this Agreement, the term "Financing Agreements" shall
mean with respect to each Aircraft the related FAA Bill of Sale, Trust Indenture
and Lease (each as defined in the Participation Agreements).

            1. Representations and Warranties. The Company hereby represents and
warrants to, and agrees with, you that:

                  (a) The Offering Memorandum, as of its date, did not, and the
Offering Memorandum will not, contain any untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary in
order to make the statements therein, in the light of the circumstances under
which they were made, not misleading.

                  (b) The Offering Memorandum, as of its date, contains or
incorporates by reference all of the information that, if requested by a
prospective purchaser of the Class C Certificates, would be required to be
provided to such prospective purchaser pursuant to Rule 144A(d)(4) under the
Securities Act.

                  (c) Assuming the accuracy of the representations and
warranties of the Purchaser contained in Section 4 and its compliance with the
agreements set forth therein, it is not necessary, in connection with the
issuance and sale of the Class C Certificates to the Purchaser in the manner
contemplated by this Agreement and the Offering Memorandum, to register the
Class C Certificates under the Securities Act or to qualify the Pass Through
Agreement under the Trust Indenture Act of 1939, as amended (the "1939 Act").

                  (d) The accountants who certified the financial statements
included in or incorporated by reference in the Offering Memorandum are
independent public accountants as required by the Securities Act.

                  (e) None of the Company or any Trust is an "investment
company", within the meaning of the Investment Company Act of 1940, as amended
(the "Investment Company Act"); and after giving effect to the offering and sale
of the Pass Through Certificates and the application of the proceeds therefor as
described in the Offering Memorandum, no Trust will be, nor will the escrow
arrangements relating to any Trust contemplated by the respective Escrow
Agreement result in the creation of, an "investment company", as defined in the
Investment Company Act.

                  (f) The Company has complied with all provisions of Section
517.075, Florida Statutes (Chapter 92-198, Laws of Florida) or is exempt
therefrom.


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                  (g) The execution and delivery by the Company of this
Agreement, the Pass Through Agreement and the other Operative Documents to which
the Company is or will be a party, the consummation by the Company of the
transactions contemplated herein and therein and in the Offering Memorandum and
compliance with the terms hereof and thereof do not and will not result in any
violation of the charter or by-laws of the Company and do not and will not
conflict with or violate, or result in a breach of any of the terms or
provisions of, or constitute a default under, or result in the creation or
imposition of any impermissible lien, charge or encumbrance upon any property or
assets of the Company under: (i) any indenture, mortgage or loan agreement, or
any other agreement or instrument to which the Company is a party or by which it
may be bound or to which any of its properties may be subject (except for such
conflicts, breaches, violations, defaults, liens, charges or encumbrances that,
individually or in the aggregate, would not have a material adverse effect on
the financial condition or on the earnings or business affairs of the Company
and its subsidiaries considered as a single entity); (ii) any existing
applicable law, rule or regulation; or (iii) any judgment, order or decree of
any government, governmental instrumentality or court, domestic or foreign,
having jurisdiction over the Company or any of its properties.

                  (h) No authorization, approval, consent, license, order of or
registration or filing with, or the giving of notice to, any government,
governmental instrumentality or court, domestic or foreign, or other regulatory
body or authority (other than, in the case of the Class G Pass Through
Certificates, with respect to the effectiveness of the Registration Statement
under the Securities Act or the qualification of the Pass Through Agreements
under the 1939 Act and other than with respect to the securities or Blue Sky
laws of the various states) is required to be obtained or made by the Company
for the valid authorization, execution, delivery and performance by the Company
of this Agreement or any of the Operative Documents to which the Company is or
will be a party or the consummation of the transactions contemplated by this
Agreement or any such Operative Documents, except such as may be required under
(i) in the case of the Class G Pass Through Certificates, the securities or Blue
Sky laws of the various states or (ii) the Transportation Code and the Uniform
Commercial Code as in effect in Utah and Virginia, which filings or recordings
referred to in this clause (ii), with respect to any particular set of Financing
Agreements, shall have been made or duly presented for filing or recordation in
all material respects or shall be in the process of being duly filed or filed
for recordation in all material respects, on or prior to the applicable Delivery
Date (as defined in the Participation Agreements) for the Aircraft related to
such Financing Agreements.

                  (i) This Agreement has been duly authorized by all necessary
corporate action and duly executed and delivered by the Company. The Operative
Documents to which the Company will be a party will be duly executed and
delivered by the Company on or prior to the Closing Date (as defined herein) or
the applicable Delivery Date (as defined in the Participation Agreements), as
the case may be.


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                  (j) The Operative Documents to which the Company is or will be
a party have been duly authorized by all necessary corporate action, will each
be substantially in the form heretofore supplied to you and will constitute,
when duly executed and delivered by the Company (assuming that such Operative
Documents constitute valid and binding obligations of each other party thereto),
valid and binding obligations of the Company, enforceable against the Company in
accordance with their terms, except to the extent that enforceability thereof
may be limited by (i) bankruptcy, insolvency, reorganization, moratorium or
other similar laws now or hereafter in effect relating to creditors' rights
generally and (ii) general principles of equity (regardless of whether
enforceability is considered in a proceeding at law or in equity). The Basic
Agreement as executed is substantially in the form filed as an exhibit to the
Registration Statement and has been duly qualified under the 1939 Act. The Class
C Certificates and the Operative Documents to which the Company is, or is to be,
a party, will conform in all material respects to the descriptions thereof in
the Offering Memorandum.

                  (k) When executed, issued, authenticated and delivered
pursuant to the provisions of the Pass Through Agreement and sold and paid for
as provided in this Agreement, the Class C Certificates will constitute valid
and legally binding obligations of the Trustee enforceable in accordance with
their terms, except to the extent that enforceability thereof may be limited by
(i) bankruptcy, insolvency, reorganization, moratorium or other similar laws now
or hereafter in effect relating to creditors' rights generally and (ii) general
principles of equity (regardless of whether enforceability is considered in a
proceeding at law or in equity); and the Class C Certificates will be entitled
to the benefits provided by the Pass Through Agreement. When executed,
authenticated, issued and delivered in the manner provided for in the Escrow
Agreement to which the Class C Pass Through Trustee is a party, the Escrow
Receipt will be legally and validly issued and will be entitled to the benefits
of the related Escrow Agreement.

                  (l) The Equipment Notes to be issued under each applicable
Indenture, when duly executed and delivered by the related Owner Trustee or the
Company, as the case may be, and duly authenticated by the Indenture Trustee in
accordance with the terms of such Indenture, will be duly issued under such
Indenture and will constitute the valid and binding obligations of such Owner
Trustee or the Company, as the case may be, enforceable in accordance with their
terms, except that enforceability thereof may be limited by (i) bankruptcy,
insolvency, reorganization, moratorium or other similar laws now or hereafter in
effect relating to creditors' rights generally and (ii) general principles of
equity (regardless of whether enforceability is considered in a proceeding at
law or in equity); and the holders thereof will be entitled to the benefits of
such Indenture.

                  (m) No Appraiser (as defined in the Offering Memorandum) is an
affiliate of the Company or has a substantial interest, direct or indirect, in
the Company. None of the officers and directors of any Appraiser is connected
with the Company or any of its affiliates as an officer, employee, promoter,
underwriter, trustee, partner, director or person performing similar functions.

                  (n) The Class C Certificates satisfy the eligibility
requirements of Rule 144A(d)(3) under the Securities Act.


<PAGE>

                  (o) Neither the Company nor any of its affiliates has,
directly or through any agent, sold, offered for sale, solicited offers to buy
or otherwise negotiated in respect of, any security (as such term is defined in
the Securities Act), which is or will be integrated with the sale of the Class C
Certificates in a manner that would require registration of the Class C
Certificates under the Securities Act.

                  (p) None of the Company or any of its affiliates or any other
person acting on its or their behalf has engaged, in connection with the
offering of the Class C Certificates, in any form of general solicitation or
general advertising within the meaning of Rule 502(c) under the Securities Act.

            The parties agree that any certificate signed by a duly authorized
officer of the Company and delivered to Purchaser, or to counsel for the
Purchaser, on the Closing Date and in connection with this Agreement or the
offering of the Certificates, shall be deemed a representation and warranty by
(and only by) the Company to the Purchaser as to the matters covered thereby.

            2. Purchase and Delivery. (a) On the basis of the representations,
warranties and agreements herein contained, but subject to the terms and
conditions herein set forth, the Company hereby agrees to cause the Trustee to
sell to AIFS, and AIFS agrees to purchase from the Trustee the principal amount
of Class C Certificates at a purchase price of 100% of the aggregate stated
principal amount thereof (the "Purchase Price"). Concurrently with the issuance
and sale of the Class C Certificates, the Company shall cause the Escrow Agent
to issue and deliver to the Trustee the Escrow Receipts in accordance with the
terms of the Escrow Agreement, which Escrow Receipts shall be attached to the
related Class C Certificates.

                  (b) Delivery of and payment of the Purchase Price for the
Class C Certificates to be purchased by you (with attached Escrow Receipts)
shall be made at the offices of Skadden, Arps, Slate, Meagher & Flom LLP, 4
Times Square, New York, New York 10036 (or at such other place as shall be
agreed upon by you and the Company) at 10:00 A.M., New York City time, on the
date hereof or such other date (which date shall be no later than the seventh
business day after the date hereof), time and place as may be agreed upon by the
Company and you (such date and time of delivery and payment for the Class C
Certificates (with attached Escrow Receipts) being herein called the "Closing
Date"). Delivery of the Class C Certificates (with attached Escrow Receipts)
issued by the Class C Trust shall be made to an account designated by you in
writing to the Company at the Depository Trust Company ("DTC") against payment
by you of the Purchase Price therefor by wire transfer of immediately available
funds to the account and in the manner specified in the related Escrow
Agreement. The Class C Certificates (with attached Escrow Receipts) issued by
the Class C Trust shall be in the form of one or more fully registered global
certificates, and shall be deposited with the Class C Trustee as custodian for
DTC and registered in the name of Cede & Co.

                  (c) The Company agrees to have the Certificates (with attached
Escrow Receipts) available for inspection and checking by you in New York, New
York not later than 1:00 P.M. on the business day prior to the Closing Date.


<PAGE>

            3. Conditions to Closing. The obligation of AIFS to purchase and pay
for the Class C Certificates pursuant to this Agreement are subject to the
accuracy of and compliance with the representations and warranties of the
Company contained herein as of the date hereof and the Closing Date, to the
accuracy of the statements of the officers of the Company made in any
certificate furnished pursuant to the provisions hereof, to the performance by
the Company of its covenants and other obligations hereunder and to the
following further conditions:

                  (a) Subsequent to the execution and delivery of this Agreement
and prior to the Closing Date, there shall not have occurred any downgrading in
the rating accorded the Class C Certificates by Moody's Investor Service or
Standard & Poor's Ratings Service set forth in the Offering Memorandum other
than a downgrade caused by a downgrade in the rating of the Company.

                  (b) (i) Each of the representations and warranties of the
Company contained herein shall be true and correct as of the Closing Date
(except to the extent that a representation or warranty expressly relates to an
earlier or later date, in which case it will be true and correct as of such
date); (ii) each of the conditions precedent set forth in Section 6 of that
certain Letter Agreement, dated as of October 31, 1997, as amended, (the "Letter
Agreement") among AVSA, S.A.R.L. ("AVSA"), the Company and US Airways Group,
Inc. ("Group") shall have been satisfied; (iii) no Termination Event as
described in Section 7 of the Letter Agreement shall have occurred; and (iv) the
Company shall have performed in all material respects all of its obligations to
be performed hereunder on or prior to the Closing Date; provided that the
condition set forth in Section 6(b) of the Letter Agreement shall be deemed
satisfied if the Company delivers to the Indenture Trustee an opinion with
respect to Section 1110 of the U.S. Bankruptcy Code meeting the requirements
described in the section of the Offering Memorandum captioned "Description of
Equipment Notes-Remedies"; and AIFS shall have received on the Closing Date a
certificate, dated the Closing Date and signed by a Vice President or Treasurer
of the Company, to the effect that each of the foregoing clauses (i) through
(iv) is true as of the Closing Date. The officer signing and delivering such
certificate may rely on the best of his or her knowledge.

                  (c) AIFS shall have received on the Closing Date an opinion,
dated the Closing Date, from the General Counsel, Deputy General Counsel or
Associate General Counsel of the Company, in form satisfactory to AIFS and AIFS'
counsel, to the effect that:

                        (i) The Company has been duly incorporated and is
      validly existing as a corporation in good standing under the laws of the
      State of Delaware and has all necessary corporate power and authority
      under such laws to own its properties, to conduct its business as
      described in the Offering Memorandum, to enter into this Agreement and
      each of the Operative Documents to which it is a party and to perform its
      obligations hereunder and thereunder (except where the failure to have
      such power or authority would not have a material adverse effect on the
      Company); and the Company is duly qualified to transact business as a
      foreign corporation in good standing in each jurisdiction in which its
      ownership of property or the conduct of its business requires such
      qualification (except where the failure to so qualify would not have a
      material adverse effect upon the Company);


<PAGE>

                        (ii) The Company is an "air carrier" and a "citizen of
      the United States" within the meaning of the Transportation Code, and
      holds an air carrier operating certificate issued pursuant to chapter 447
      of Title 49 of the United States Code; the descriptions in the Offering
      Memorandum with respect to statutes, contracts, administrative orders and
      regulations and legal and governmental proceedings are accurate and fairly
      summarize the information that would be required to be shown (if the
      Offering Memorandum were subject to the Securities Act of 1933, as amended
      (the "1933 Act")); and there are, to the best of our counsel's knowledge,
      no statutes, administrative orders or regulations or pending or threatened
      legal or governmental proceedings which would be required to be described
      in the Offering Memorandum (if the Offering Memorandum were subject to the
      1933 Act) which are not described as required, nor any contracts or
      documents of a character that would be required to be described or
      referred to in the Offering Memorandum (if the Offering Memorandum were
      subject to the 1933 Act), that are not so described, referred to or filed
      as would be so required;

                        (iii) The statements in the Offering Memorandum as to
      the routes that the Company presently operate or is authorized to operate
      are correct in all material respects. Except as disclosed in the Offering
      Memorandum, no action or proceeding has been instituted or to such
      counsel's knowledge, has been threatened by the United States Department
      of Transportation, the Federal Aviation Administration or the aeronautical
      authorities of any other country that would impair the Company's ability
      to operate such routes;

                        (iv) This Agreement has been duly authorized, executed
      and delivered by the Company;

                        (v) No authorization, approval, consent, license, order
      of, or registration with, or the giving of notice to, any government,
      governmental instrumentality, or court, domestic or foreign, or other
      regulatory body or authority (other than, in the case of the Class C
      Certificates, with respect to the qualification of the Basic Agreement
      under the 1939 Act and other than, in the case of the Class C
      Certificates, with respect to the securities or Blue Sky laws of the
      various states and with respect to any registration, filing or recording
      that may be required under the Transportation Code and the Uniform
      Commercial Code as in effect in various jurisdictions) is required to be
      obtained or made by the Company for the valid authorization, issuance,
      sale and delivery of the Class C Certificates and the Equipment Notes
      relating thereto or for the valid authorization, execution, delivery and
      performance by the Company of this Agreement and each of the Operative
      Documents to which the Company is or will be a party or the consummation
      of the transactions contemplated by this Agreement and such Operative
      Documents;


<PAGE>

                        (vi) The execution and delivery by the Company of this
      Agreement and the Operative Documents to which the Company is or will be a
      party, the issuance and sale of the Class C Certificates and the related
      Equipment Notes, the issuance of the Escrow Receipts attached to the Class
      C Certificates, the consummation by the Company of the transactions
      contemplated herein and therein and in the Offering Memorandum and
      compliance with the terms hereof and thereof do not and will not result in
      any violation of the charter or by-laws of the Company and do not and will
      not conflict with or violate, or result in a breach of any of the terms or
      provisions of, or constitute a default under, or result in the creation or
      imposition of any impermissible lien, charge or encumbrance upon any
      property or assets of the Company under (A) any indenture, mortgage or
      loan agreement, or any other agreement or instrument known to such
      counsel, to which the Company is a party or by which either it be bound or
      to which any of its properties may be subject (except for such conflicts,
      breaches, defaults, violations, liens, charges or encumbrances that,
      individually or in the aggregate, would not have a material adverse effect
      on the financial condition or on the earnings or business affairs of the
      Company and its subsidiaries considered as a single entity); (B) any
      existing applicable law, rule or regulation (other than the securities or
      Blue Sky laws of the various states, as to which such counsel need express
      no opinion); or (C) any judgment, order or decree known to such counsel of
      any government, governmental instrumentality or court, domestic or
      foreign, having jurisdiction over the Company or any of its properties;

                        (vii) No default exists in the performance or observance
      of any material obligation, agreement, covenant or condition contained in
      any contract, indenture, loan agreement, note, lease or other agreement or
      instrument that is described or referred to in the Offering Memorandum or
      filed as an exhibit to the Registration Statement on Form S-3 (File No.
      333-47348) filed by the Company with the Securities and Exchange
      Commission (the "Registration Statement");

                        (viii) Except as disclosed in the Offering Memorandum,
      there is no action, suit or proceeding before or by any government,
      governmental instrumentality or court, domestic or foreign, now pending
      or, to the knowledge of such counsel, threatened against or affecting the
      Company that might reasonably be expected to result in any material
      adverse change in the financial condition or in the earnings or business
      affairs of the Company, or that could adversely affect the consummation of
      the transactions contemplated by this Agreement or any of the other
      Operative Documents to which the Company is or will be a party; and

                        (ix) Such counsel has participated in the preparation of
      the Offering Memorandum and the documents incorporated by reference in the
      Offering Memorandum and such counsel has no reason to believe that the
      Offering Memorandum or any amendment or supplement thereto (except for the
      financial statements and other financial or statistical data included or
      incorporated by reference therein or omitted therefrom, and except for the
      Statement of Eligibility on Form T-1 of the Trustee as to which such
      counsel need express no opinion), at the time the Offering Memorandum was
      issued, at the time any amended or supplemental Offering Memorandum was
      issued or as of the Closing Date, contained or contains any untrue
      statement of a material fact or omitted or omits to state a material fact
      necessary in order to make the statements therein, in the light of the
      circumstances under which they were made, not misleading.


<PAGE>

                  (d) You shall have received on the Closing Date an opinion,
dated the Closing Date, of Skadden, Arps, Slate, Meagher & Flom LLP, counsel for
the Company, in form and substance reasonably satisfactory to you and
substantially to the effect set forth in Exhibit A hereto.

                  (e) You shall have received on the Closing Date an opinion of
Bingham Dana, LLP, counsel for State Street Bank and Trust Company of
Connecticut, National Association, individually and as Trustee, Subordination
Agent and Paying Agent, dated the Closing Date, in form and substance reasonably
satisfactory to you and substantially to the effect set forth in Exhibit B
hereto.

                  (f) You shall have received on the Closing Date an opinion of
Ray, Quinney & Nebeker, counsel for the Escrow Agent, dated the Closing Date, in
form and substance reasonably satisfactory to you and substantially to the
effect set forth in Exhibit C hereto.

                  (g) You shall have received an the Closing Date an opinion of
Shearman & Sterling, counsel for the Liquidity Provider, dated the Closing Date,
in form and substance reasonably satisfactory to you and substantially to the
effect set forth in Exhibit D hereto.

                  (h) You shall have received on the Closing Date an opinion of
Vedder, Price, Kaufman & Kammholz, counsel for the Depositary for the Class C
Trust, dated the Closing Date, and an opinion of in-house counsel to the
Depositary, dated the Closing Date, each in form and substance reasonably
satisfactory to you and substantially to the effect set forth in Exhibit E
hereto.

                  (i) Each of the Appraisers shall have furnished to AIFS a
letter from such Appraiser, addressed to the Company and dated the Closing Date,
confirming that such Appraiser and each of its directors and officers (i) is not
an affiliate of the Company or any of its affiliates; (ii) does not have any
substantial interest, direct or indirect, in the Company or any of its
affiliates; and (iii) is not connected with the Company or any of its affiliates
as an officer, employee, promoter, underwriter, trustee, partner, director or
person performing similar functions.

                  (j) At the Closing Date, each of the Operative Documents
(other than the Indentures, Leases and Participation Agreements) shall be duly
executed and delivered by each of the parties thereto; the representations and
warranties of the Company contained in each of such executed Operative Documents
shall be true and correct in all material respects as of the Closing Date
(except to the extent that they relate solely to an earlier or later date, in
which case they shall be true and correct as of such earlier or later date) and
you shall have received a certificate of the President or a Vice President of
the Company, dated as of the Closing Date, to such effect.

                  (k) [Reserved.]

                  (l) The Class G Certificates (with attached Escrow Receipts)
in the amount and containing the terms described in the Offering Memorandum
shall be concurrently issued and purchased by the Underwriters.


<PAGE>

            4. Representations and Warranties of the Purchaser. AIFS represents
and warrants to the Company and the Class C Trust that:

                  (a) It understands that any subsequent transfer of the
Certificates is subject to certain restrictions and conditions set forth in the
Pass Through Agreement relating to the Class C Certificates and it agrees to be
bound by, and not to resell, pledge or otherwise transfer the Class C
Certificates except in compliance with or pursuant to a transaction exempt from,
such restrictions and conditions and the Securities Act.

                  (b) It understands that the Class C Certificates have not been
registered under the Securities Act, are being sold to it in a transaction that
is exempt from the registration requirements of the Securities Act and that the
Class C Certificates may not be reoffered or resold except as permitted in the
following sentence. It agrees that, if it should sell any Class C Certificate
within two years after the later of the original issuance of such Class C
Certificate and the last date on which such Class C Certificate is owned by US
Airways, the Trustee or any affiliate of any of such persons, it shall do so
only (A) to US Airways, Inc., (B) to a person who it reasonably believes is a
"qualified institutional buyer" in compliance with Rule 144A under the
Securities Act, (C) to an institutional "accredited investor" acquiring $100,000
or more aggregate principal amount of such Certificate that, prior to such
transfer, furnished to the Trustee a signed letter containing certain
representations and agreements relating to the restrictions on transfer of such
Certificate (the form of which letter can be obtained from the Trustee), (D)
pursuant to the exemption from registration provided by Rule 144 under the
Securities Act (if available), (E) in accordance with another exemption from the
Securities Act or (F) pursuant to an effective registration statement under the
Securities Act; and it further agrees to provide to any person purchasing any of
the Certificates from it (other than pursuant to clauses (D) and (F) above) a
notice advising such purchaser that resales of such Certificates are restricted
as stated in the Trust Supplement No. 2000-3C.

                  (c) It understands that, on any proposed resale of any Class C
Certificates as contemplated by clause (B) of paragraph (b) above, it shall be
required to furnish to US Airways and to the Trustee such certifications, legal
opinions and other information as US Airways and the Trustee may reasonably
require to confirm that the proposed sale complies with the foregoing
restrictions. It further understands that the Class C Certificates purchased by
it shall bear a legend to the foregoing effect.

                  (d) It is an institutional "accredited investor" (as defined
in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and
has such knowledge and experience in financial and business matters as to be
capable of evaluating the merits and risks of its investment in the Class C
Certificates, and it and any accounts for which it is acting are each able to
bear the economic risks of its or their investments.


<PAGE>

                  (e) It is not acquiring the Class C Certificates with plan
assets of any plan subject to Title I of the Employee Retirement Income Security
Act of 1974, as amended ("ERISA"), or Section 4975 of the Internal Revenue Code
of 1986, as amended (the "Code").

            5. Further Agreements of the Company. The Company agrees with the
Purchaser:

                  (a) At any time prior to the first to occur of (i) the date on
which the Purchaser receives freely transferable Exchange Certificates in a
Registered Exchange Offer (including as a result of the Purchaser having to
deliver a prospectus in connection with any resale of Exchange Certificates),
(ii) the date on which a Shelf Registration Statement is declared effective,
(iii) the date on which the Purchaser ceases to own any Securities (each of the
foregoing capitalized terms are used as defined in the Registration Agreement)
and (iv) the date that is the second anniversary of the Closing Date (the
"Applicable Date"), to advise the Purchaser promptly and, if requested, confirm
such advice in writing, of the happening of any event which makes any statement
of a material fact made in the Offering Memorandum untrue or which requires the
making of any additions to or changes in the Offering Memorandum (as amended or
supplemented from time to time) in order to make the statements therein, in the
light of the circumstances under which they were made, not misleading; to advise
the Purchaser promptly of any order preventing or suspending the use of the
Offering Memorandum, of any suspension of the qualification of the Class C
Certificates for offering or sale in any jurisdiction and of the initiation or
threatening of any proceeding for any such purpose; and to use reasonable
efforts to prevent the issuance of any such order preventing or suspending the
use of the Offering Memorandum or suspending any such qualification and, if any
such suspension is issued, to obtain the lifting thereof at the earliest
possible time;

                  (b) For so long as the Purchaser owns any Securities (as
defined in the Registration Agreement), to furnish promptly to the Purchaser as
many copies of the Offering Memorandum (and any amendments or supplements
thereto) as may be reasonably requested;

                  (c) For so long as the Purchaser owns any Securities (as
defined in the Registration Agreement), prior to making any amendment or
supplement to the Offering Memorandum, to furnish a copy thereof to each of the
Purchaser and counsel for the Purchaser and not to effect any such amendment or
supplement to which the Purchaser shall reasonably object by notice to the
Company after a reasonable period to review;

                  (d) For so long as the Purchaser owns any Securities (as
defined in the Registration Agreement), if, at any time prior to the Applicable
Date, any event shall occur or condition exist as a result of which it is
necessary, in the reasonable opinion of counsel for the Purchaser or counsel for
the Company, to amend or supplement the Offering Memorandum in order that the
Offering Memorandum will not include an untrue statement of a material fact or
omit to state a material fact necessary in order to make the statements therein,
in the light of the circumstances existing at the time it is delivered to a
purchaser, not misleading, or if it is necessary to amend or supplement the
Offering Memorandum to comply with applicable law (or to contain current
financial information, which may be incorporated by reference), at the request
of the Purchaser, to promptly prepare such amendment or supplement as may be
necessary to correct such untrue statement or omission or so that the Offering
Memorandum, as so amended or supplemented, will comply with applicable law;


<PAGE>

                  (e) For so long as the Class C Certificates are outstanding
and are "restricted securities" within the meaning of Rule 144(a)(3) under the
Securities Act, to furnish to holders of the Class C Certificates and
prospective purchasers of the Class C Certificates designated by such holders,
upon request of such holders or such prospective purchasers, the information
required to be delivered pursuant to Rule 144A(d)(4) under the Securities Act,
unless the Company is then subject to and in compliance with Section 13 or 15(d)
of the Exchange Act (the foregoing agreement being for the benefit of the
holders from time to time of the Class C Certificates and prospective purchasers
of the Class C Certificates designated by such holders);

                  (f) For so long as the Purchaser owns any Securities (as
defined in the Registration Agreement), to promptly take from time to time such
actions as the Purchaser may reasonably request to qualify the Class C
Certificates for offering and sale under the securities or Blue Sky laws of such
jurisdictions as the Purchaser may designate and to continue such qualifications
in effect until the Applicable Date; and to arrange for the determination of the
eligibility for investment of the Class C Certificates under the laws of such
jurisdictions as the Purchaser may reasonably request; provided that the Company
and its subsidiaries shall not be obligated to qualify as foreign corporations
in any jurisdiction in which they are not so qualified or to file a general
consent to service of process in any jurisdiction;

                  (g) Arrange for the Class C Certificates to be eligible for
clearance and settlement through DTC;

                  (h) Not to, and to cause its affiliates not to, sell, offer
for sale or solicit offers to buy or otherwise negotiate in respect of any
security (as such term is defined in the Securities Act) which could be
integrated with the sale of the Class C Certificates to the Purchaser in a
manner which would require registration of the Class C Certificates under the
Securities Act;

                  (i) Except following the effectiveness of a Registration
Statement (as defined in the Registration Agreement), not to, and to cause its
affiliates not to, authorize or knowingly permit any person acting on their
behalf to, solicit any offer to buy or offer to sell the Class C Certificates by
means of any form of general solicitation or general advertising within the
meaning of Regulation D or in any manner involving a public offering within the
meaning of Section 4(2) of the Securities Act; and not to offer, sell, contract
to sell or otherwise dispose of, directly or indirectly, any securities under
circumstances where such offer, sale, contract or disposition would cause the
exemption afforded by Section 4(2) of the Securities Act to cease to be
applicable to the offering and sale of the Class C Certificates as contemplated
by this Agreement; and

                  (j) In connection with sales or potential sales of the Class C
Certificates by the Purchaser, the Company agrees to make its officers,
employees, independent accountants and legal counsel reasonably available to the
Purchaser in connection with each filing of a Form 10-Q, Form 10-K or a Form 8-K
by the Company; provided that the reasonable out-of-pocket fees and expenses of
the Company incurred in connection therewith for such accountants and legal
counsel shall be paid by Purchaser; provided further that if at the time
Purchaser requests access to the Company's accountants and legal counsel the
Company is engaged in a securities offering and is otherwise making its
accountants and legal counsel available in connection therewith Purchaser shall
only be responsible for any such expenses that the Company would not otherwise
have incurred.


<PAGE>

            6. Indemnification and Contribution. (a) The Company agrees to
indemnify and hold harmless AIFS, its affiliates, their respective officers,
directors, representatives, employees and agents and each person, if any, who
controls AIFS within the meaning of either Section 15 of the Securities Act or
Section 20 of the Exchange Act, from and against any and all losses, claims,
damages and liabilities caused by any untrue or alleged untrue statement of a
material fact contained in the Offering Memorandum (as amended or supplemented
if the Company shall have furnished any amendments or supplements thereto), or
caused by any omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein in
light of the circumstances under which they were made not misleading.

                  (b) In case any proceeding (including any governmental
investigation) shall be instituted involving any person in respect of which
indemnity may be sought pursuant to paragraph (a) above, such person (the
"indemnified party") shall promptly notify the person against whom such
indemnity may be sought (the "indemnifying party") in writing and the
indemnifying party, upon request of the indemnified party, shall retain counsel
reasonably satisfactory to the indemnified party to represent the indemnified
party and any others the indemnifying party may designate in such proceeding and
shall pay the reasonable fees and disbursements of such counsel related to such
proceeding. In any such proceeding, any indemnified party shall have the right
to retain its own counsel, but the reasonable fees and expenses of such counsel
shall be at the expense of such indemnified party unless (i) the indemnifying
party and the indemnified party shall have agreed to the retention of such
counsel or (ii) the named parties to any such proceeding (including any
impleaded parties) include both the indemnifying party and the indemnified party
and representation of both parties by the same counsel would be inappropriate
due to actual or potential differing interests between them. It is understood
the indemnifying party shall not, in connection with any proceeding or related
proceedings in the same jurisdiction, be liable for the reasonable fees and
expenses of more than one firm (in addition to any local counsel) for all such
indemnified parties and that all such fees and expenses shall be reimbursed as
they are incurred. Such firm shall be designated in writing by AIFS in the case
of parties indemnified pursuant to paragraph (a) above. The indemnifying party
shall not be liable for any settlement of any proceeding effected without its
written consent, but if settled with such consent or if there be a final
judgment for the plaintiff, the indemnifying party agrees to indemnify the
indemnified party from and against any loss or liability by reason of such
settlement or judgment. No indemnifying party shall, without the prior written
consent of the indemnified party, effect any settlement of any pending or
threatened proceeding in respect of which any indemnified party is or could have
been a party and indemnity could have been sought hereunder by such indemnified
party, unless such settlement includes an unconditional release of such
indemnified party from all liability on claims that are the subject matter of
such proceeding and does not include a statement as to or an admission of fault,
culpability or failure to act by or on behalf of any indemnified party.


<PAGE>

                  (c) To the extent the indemnification provided for in
paragraph (a) of this Section 6 is unavailable to an indemnified party or
insufficient in respect of any losses, claims, damages or liabilities, then each
indemnifying party under such paragraph, in lieu of indemnifying such
indemnified party thereunder, shall contribute to the amount paid or payable by
such indemnified party as a result of such losses, claims, damages or
liabilities (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company, on the one hand, and AIFS, on the other hand,
from the offering of the Class C Certificates or (ii) if the allocation provided
by clause (i) above is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits referred to in clause (i)
above but also the relative fault of the Company on the one hand and AIFS on the
other hand in connection with the statements or omissions that resulted in such
losses, claims, damages or liabilities, as well as any other relevant equitable
considerations. The relative benefits received by the Company in connection with
the offering of the Class C Certificates shall be deemed to be in the same
proportion as the aggregate consideration received by the Class C Trust from the
sale by the Class C Trust of the Class C Certificates (or securities which were
exchanged for the Class C Certificates) bears to the aggregate consideration
received by the Purchaser in connection with the resale of the Class C
Certificates, and the Purchaser shall be deemed to have received the rest of the
benefits. The relative fault of the Company on the one hand and of AIFS on the
other hand shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
or by AIFS and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission.

                  (d) The Company and AIFS agree that it would not be just or
equitable if contribution pursuant to this Section 6 were determined by pro rata
allocation or by any other method of allocation that does not take account of
the equitable considerations referred to in paragraph (c) above. The amount paid
or payable by an indemnified party as a result of the losses, claims, damages
and liabilities referred to in paragraph (c) above shall be deemed to include,
subject to the limitations set forth above, any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
Section 6, AIFS shall not be required to contribute any amount in excess of the
amount by which the total price at which the Class C Certificates sold by it
were sold exceeds the principal amount of such Class C Certificates. No person
guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of
the Securities Act) shall be entitled to contribution from any person who was
not guilty of such fraudulent misrepresentation. The indemnity and contribution
provisions contained in this Section 6 and the representations and warranties of
the Company contained in this Agreement shall remain operative and in full force
and effect regardless of (i) any termination of this Agreement, (ii) any
investigation made by or on behalf of AIFS or any person controlling AIFS or by
or on behalf of the Company, its officers or directors or any person controlling
the Company and (iii) acceptance of and payment for any of the Class C
Certificates. The remedies provided for in this Section 6 are not exclusive and
shall not limit any rights or remedies which may otherwise be available to any
indemnified party at law or in equity.


<PAGE>

                  (e) The indemnity and contribution provisions contained in
this Section 6 and the representations, warranties and other statements of the
Company contained in this Agreement or contained in certificates of officers of
the Company submitted pursuant hereto, shall remain operative and in full force
and effect regardless of (i) any termination of this Agreement, (ii) any
investigation made by or on behalf of AIFS or any person controlling AIFS or the
Company, its officers or directors or any person controlling the Company and
(iii) acceptance of and payment for any of the Class C Certificates.

            7. Termination. This Agreement shall be subject to termination in
your absolute discretion, by oral notice confirmed in writing, given by you to
the Company, if prior to delivery of and payment for the Class C Certificates
any of the events described in Section 3(a) or Section 3(b)(iii) occur, and it
shall also automatically terminate immediately if prior to delivery of and
payment for the Class C Certificates upon the termination of (x) the
Underwriting Agreement, dated as of October 26, 2000, among the Company and
Morgan Stanley & Co. Incorporated, Credit Lyonnais Securities (USA) Inc.,
Deutsche Bank Securities Inc., and SG Cowen Securities Corporation or (y) the
Letter Agreement.

            8. Notices. All notices and other communications under this
Agreement shall be in writing, unless otherwise stated herein, and shall be
deemed to have been duly given if delivered, mailed or transmitted by any
standard form of telecommunication. Notices to you shall be directed to you at
2nd Floor, George's Dock House, International Financial Services Centre, Dublin
1, Ireland, Attention: Legal Department (011-353-1-829-1866 if by telecopy); and
notices to the Company shall be directed to it at US Airways, Inc., Crystal Park
Four, 2345 Crystal Drive, Arlington, VA 22227, Attention: Treasurer
(703/872-5936 if by telecopy).

            9. Counterparts. This Agreement may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

            10. APPLICABLE LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

            11. Headings. The headings of the sections of this Agreement have
been inserted for convenience of reference only and shall not be deemed a part
of this Agreement.


<PAGE>

            12. Effect of Operative Documents. (a) The financing contemplated
hereby shall constitute (i) a Seller Financing, (ii) a Qualifying Financing
Transaction and (iii) a utilization in full of the Seller Commitment (as each
such term is defined in the Letter Agreement), in each case with respect to the
Aircraft described in the Offering Memorandum, in an amount equal to the
aggregate principal amount of the Class C Certificates issued on the Closing
Date, less any amount of Deposits returned to AIFS pursuant to the Operative
Documents. Solely with respect to the financing contemplated by the Operative
Documents, and except as provided in the next succeeding sentence and in Section
13 hereof, the terms and conditions of the Operative Documents will, as of the
Closing Date, supersede and replace the general terms and conditions set forth
in Sections 3 and 4 of the Letter Agreement. Without limiting or affecting the
parties' rights or obligations hereunder or under the Registration Agreement,
the terms and conditions set forth (i) under the captions "Transfer Rights" and
"Transaction Expenses" in Section 4 of the Letter Agreement and (ii) except as
expressly set forth in that certain Consent, Waiver and Acknowledgment
Agreement, dated the date hereof, among the Company, Group and AVSA in all
sections of the Letter Agreement (other than Sections 3 and 4) shall survive the
execution and delivery hereof and of the Operative Documents and the Financing
Agreements and shall remain in full force and effect in accordance with their
terms, including, without limitation, with respect to the financing contemplated
by the Operative Documents.

                  (b) Without limiting the first sentence of paragraph (a) of
this Section 12, neither this Agreement nor the consummation of the financing
contemplated hereby shall in any way limit or affect the application of the
Letter Agreement to any other proposed utilization of the Seller Commitment.

            13. Covenants as to Letter Agreement. The Company covenants that the
aggregate principal amount of the Series C Equipment Notes issued with respect
to all of the Aircraft described in the Offering Memorandum shall not exceed the
Seller Commitment. The Company further covenants that the aggregate principal
amount of the Series C Equipment Notes issued with respect to each Aircraft
described in the Offering Memorandum shall not exceed the Available Per Aircraft
Financing Amount (as defined in Section 1(a) of the Letter Agreement) with
respect to such Aircraft. The financing of each aircraft will comply with the
last sentence of the first paragraph of the section of the Letter Agreement
captioned "General Terms and Conditions-Documentation-Tax Indemnities." In
addition, the Equipment Notes issued with respect to any aircraft will comply
with the final sentence of Section 1(g) of the Letter Agreement. The covenants
set forth in this Section 13 shall apply only if AIFS owns one or more Class C
Certificates.


<PAGE>


            IN WITNESS WHEREOF, we have executed this Purchase Agreement as of
the date first written above.

                                   Very truly yours,

                                   US AIRWAYS, INC.

                                   By:   /s/ Jeffery A. McDougle
                                      ----------------------------------------
                                         Name:  Jeffery A. McDougle
                                         Title: Vice President and Treasurer

Accepted as of the date hereof

Airbus Industrie Financial Services

By:   /s/ Catharine Ennis
   ----------------------------------
     Name:  Catharine Ennis
     Title: Director


<PAGE>

                                                                      SCHEDULE I

                Class C Pass Through Certificates, Series 2000-3

<TABLE>
<CAPTION>
     Pass Through              Aggregate        Interest       Final Expected
Certificate Designation    Principal Amount       Rate        Distribution Date
-----------------------    ----------------       ----        -----------------
<S>                        <C>                  <C>           <C>
        2000-3C              $157,054,000        8.39%          March 1, 2022
</TABLE>