425

Filed by AMR Corporation

Commission File No. 1-8400

Pursuant to Rule 425 Under the Securities Act of 1933

And Deemed Filed Pursuant to Rule 14a-12

Under the Securities Exchange Act of 1934

Subject Company: US Airways Group, Inc.

Commission File No. 001-8444

Hi everyone –

The planning work for our integration with US Airways continues, so I’d like to provide you a quick update on a few things.

First, back on May 10 Judge Sean Lane, the judge presiding over American’s bankruptcy proceedings, entered an order approving the merger. American’s creditors, US Airways’ shareholders and regulators must still approve the merger, but Judge Lane’s ruling is one more step forward for our combination.

While we work towards a closing date in the third quarter of this year, planning work continues as teams from both American’s Flight Service and US Airways InFlight departments have been meeting for the past few weeks in DFW and Tempe. The teams have been busy comparing policies, procedures, delivery methods, and technology to determine where we have similarities and where we have gaps. Once the work of identifying gaps is complete, the groups will draft preliminary recommendations on how to close those gaps and present them to a committee comprised of representatives from both American and US Airways. It will likely take one to two years after closing before we begin operating as a single carrier, but as you can see work has already begun to make that transition as smooth as possible.

Don’t forget to take a look at the newly updated Merger site and the latest Integration Team Update on new Jetnet for the most up-to-date information and more details about the work going on at both American and US Airways. Now it’s even easier to find the information you’re looking for!

Have a great day.

Sincerely,

Lauri

Additional Information and Where To Find It

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval. The proposed merger transaction between AMR Corporation (“AMR”) and US Airways Group, Inc. (“US Airways”) will be submitted to the stockholders of US Airways for their consideration. AMR has filed with the Securities and Exchange Commission (“SEC”) a registration statement on Form S-4, which includes a preliminary proxy statement of US Airways that also constitutes a prospectus of AMR. US Airways expects to file with the SEC a definitive proxy statement on Schedule 14A, and AMR and US Airways also plan to file other documents with the SEC regarding the proposed transaction. INVESTORS AND SECURITY HOLDERS OF US AIRWAYS ARE URGED TO READ THE PRELIMINARY PROXY STATEMENT/PROSPECTUS AND OTHER RELEVANT DOCUMENTS THAT WILL BE FILED WITH THE SEC (INCLUDING THE DEFINITIVE PROXY STATEMENT/PROSPECTUS) CAREFULLY AND IN THEIR ENTIRETY WHEN THEY BECOME AVAILABLE BECAUSE THEY CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders may obtain free copies of the preliminary proxy statement/prospectus and other documents containing important information about AMR and US Airways (including the definitive proxy statement/prospectus), once such documents are filed with the SEC, through the website maintained by the SEC at http://www.sec.gov. Copies of the documents filed with the SEC by US Airways, when and if available, can be obtained free of charge on US Airways’ website at www.usairways.comor by directing a written request to US Airways Group, Inc., 111 West Rio Salado Parkway, Tempe, Arizona 85281, Attention: Vice President, Legal Affairs. Copies of the documents filed with the SEC by AMR, when and if available, can be obtained free of charge on AMR’s website at www.aa.com or by directing a written request to AMR Corporation, P.O. Box 619616, MD 5675, Dallas/Fort Worth International Airport, Texas 75261-9616, Attention: Investor Relations or by emailing investor.relations@aa.com.

US Airways, AMR and certain of their respective directors, executive officers and certain members of management may be deemed to be participants in the solicitation of proxies from the stockholders of US Airways in connection with the proposed transaction. Information about the directors and executive officers of US Airways is set forth in its Annual Report on Form 10-K/A, which was filed with the SEC on April 16, 2013, and the preliminary proxy statement/prospectus related to the proposed transaction, which is included in the Form S-4 that was filed with the SEC on April 15, 2013 and amended on May 20, 2013. Information about the directors and executive officers of AMR is set forth in its Annual Report on Form 10-K/A, which was filed with the SEC on April 16, 2013, and the preliminary proxy statement/prospectus related to the proposed transaction, which is included in the Form S-4 that was filed with the SEC on April 15, 2013 and amended on May 20, 2013. These documents can be obtained free of charge from the sources indicated above. Other information regarding the participants in the proxy solicitation may also be included in the definitive proxy statement/prospectus and other relevant materials when and if filed with the SEC in connection with the proposed transaction.

Cautionary Statement Regarding Forward-Looking Statements

This document includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements may be identified by words such as “may,” “will,” “expect,” “intend,” “anticipate,” “believe,” “estimate,” “plan,” “project,” “could,” “should,” “would,” “continue,” “seek,” “target,” “guidance,” “outlook,” “forecast” and other similar words. These forward-looking statements are based on AMR’s and US Airways’ current objectives, beliefs and expectations, and they are subject to significant risks and uncertainties that may cause actual results and financial position and timing of certain events to differ materially from the information in the forward-looking statements. The following factors, among others, could cause actual results and financial position and timing of certain events to differ materially from those described in the forward-looking statements: the challenges and costs of the proposed transaction, including integrating operations and achieving anticipated synergies; the price of, market for and potential market price volatility of common stock of the ultimate parent entity following the closing of the proposed transaction; significant liquidity requirements and substantial levels of indebtedness of the combined company following the closing; potential limitations on the use of certain tax attributes following the closing; failure of the proposed transaction to be completed; and other economic, business, competitive, and/or regulatory factors affecting the business of the combined company after the closing and the businesses of US Airways and AMR generally, including those set forth in the filings of US Airways and AMR with the SEC, especially in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of their respective annual reports on Form 10-K and quarterly reports on Form 10-Q, their current reports on Form 8-K and other SEC filings, including the registration statement and the proxy statement/prospectus related to the proposed transaction. Any forward-looking statements speak only as of the date hereof or as of the dates indicated in the statements. Neither AMR nor US Airways assumes any obligation to publicly update or supplement any forward-looking statement to reflect actual results, changes in assumptions or changes in other factors affecting these forward-looking statements except as required by law.