Amendment No. 9 to the Amended and Restated Airbus A320 Family Aircraft Purchase Agreement dated as of October 2, 2007 between AIRBUS S.A.S. and US AIRWAYS, INC.

Exhibit 10.23

Amendment No. 9

to the

Amended and Restated Airbus A320 Family Aircraft Purchase Agreement

dated as of October 2, 2007

between

AIRBUS S.A.S.

and

US AIRWAYS, INC.

This Amendment No. 9 to the Amended and Restated Airbus A320 Family Aircraft Purchase Agreement between Airbus S.A.S. and US Airways, Inc. (the “Amendment”) is entered into as of March 31, 2011, by and between Airbus S.A.S., a société par actions simplifiée, organized and existing under the laws of the Republic of France, having its registered office located at 1, rond-point Maurice Bellonte, 31700 Blagnac, France (the “Seller”), and US Airways, Inc., a corporation organized and existing under the laws of the State of Delaware, United States of America, having its principal corporate offices located at 111 West Rio Salado Parkway, Tempe, Arizona 85281, U.S.A. (the “Buyer”).

WHEREAS, the Buyer and the Seller have entered into an Amended and Restated Airbus A320 Family Purchase Agreement, dated as of October 2, 2007, which agreement, as previously amended by and supplemented with all Exhibits, Appendices, Letter Agreements and amendments, including Amendment No. 1 dated as of January 11, 2008, Amendment No. 2 dated as of October 20, 2008, Amendment No. 3 dated as of January 16, 2009, Amendment No. 4 dated as of August 11, 2009, Amendment No. 5 dated as of October 2, 2009, Amendment No. 6 dated as of November 20, 2009, Amendment No. 7 dated as of April 1, 2010 and Amendment No. 8 dated as of January 13, 2011 (“Amendment No. 8”) (the “Agreement”) relates to the sale by the Seller and the purchase by the Buyer of certain Airbus single-aisle aircraft; and

WHEREAS, the Buyer and the Seller agree to convert certain Aircraft in accordance with the terms of the Agreement.

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NOW, THEREFORE, IT IS AGREED AS FOLLOWS:

Capitalized terms used herein and not otherwise defined in this Amendment will have the meanings assigned to them in the Agreement. The terms “herein,” “hereof,” and “hereunder” and words of similar import refer to this Amendment.

Pursuant to the terms of Amended and Restated Letter Agreement No. 3 to the Agreement, the Buyer irrevocably, except as otherwise provided in Amendment No. 7, exercises its right to make certain model conversions as follows:

QUOTE

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UNQUOTE

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This Amendment is subject to the confidentiality provisions set forth in Clause 22.7 of the Agreement.

This Amendment may be signed in separate counterparts. Each counterpart, when signed and delivered (including counterparts delivered by facsimile transmission), will be an original, and the counterparts will together constitute one and the same instrument.

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IN WITNESS WHEREOF, these presents were entered into as of the day and year first above written.

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Exhibit B

Conversion Schedule

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