Exhibit 99.4

UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

As previously reported, on November 29, 2011, AMR Corporation (renamed American Airlines Group Inc., the “Company” or “AAG”), its principal subsidiary, American Airlines, Inc., and certain of the Company’s other direct and indirect domestic subsidiaries (collectively, the “Debtors”), filed voluntary petitions for relief under Chapter 11 of the United States Bankruptcy Code (“Chapter 11”) in the United States Bankruptcy Court for the Southern District of New York (the “Bankruptcy Court”). On October 21, 2013, the Bankruptcy Court entered an order (the “Confirmation Order”) approving and confirming the Debtors’ fourth amended joint plan of reorganization (the “Plan”).

On December 9, 2013 (the “Effective Date”), the Debtors consummated their reorganization pursuant to the Plan, principally through the transactions contemplated by that certain Agreement and Plan of Merger, dated as of February 13, 2013 (as amended, the “Merger Agreement”), by and among the Company, AMR Merger Sub, Inc. (“Merger Sub”) and US Airways Group, Inc. (“US Airways Group”), pursuant to which Merger Sub merged with and into US Airways Group (the “Merger”), with US Airways Group surviving as a wholly owned subsidiary of the Company following the Merger. Pursuant to the Merger Agreement, each share of common stock, par value $0.01 per share, of US Airways Group (the “US Airways Group Common Stock”) was converted into the right to receive one share of common stock, par value $0.01 per share, of the Company (the “AAG Common Stock”). On the Effective Date, all outstanding US Airways Group equity awards converted into equity awards with respect to AAG Common Stock on the same terms and conditions as were applicable to such equity awards immediately prior to the Effective Date.

The Unaudited Pro Forma Condensed Combined Balance Sheet combines the historical consolidated balance sheets of the Company and US Airways Group, giving effect to the Merger as if it had been consummated on September 30, 2013, and the Unaudited Pro Forma Condensed Combined Statements of Operations for the nine months ended September 30, 2013 and the year ended December 31, 2012 combines the historical consolidated statements of operations of the Company and US Airways Group, giving effect to the Merger as if it had been consummated on January 1, 2012, the beginning of the earliest period presented. The historical consolidated financial statements of the Company and US Airways Group have been adjusted to reflect certain reclassifications in order to conform the financial statements’ presentation.

The unaudited pro forma condensed combined financial statements were prepared using the acquisition method of accounting with the Company treated as the accounting acquirer. Accordingly, US Airways Group’s identifiable assets acquired and liabilities assumed are recognized at their estimated fair values as of the Effective Date. Goodwill is measured as the excess of the fair value of the consideration transferred in the Merger over the fair value of the identifiable net assets. As of the date of this Current Report on Form 8-K/A, pro forma adjustments made to historical US Airways Group assets and liabilities have been based upon current estimates of fair value that are preliminary and subject to further adjustment as additional information becomes available, additional analyses are performed, and as warranted by changes in current conditions and future expectations. Pro forma adjustments to historical US Airways Group assets and liabilities were based on fair value estimates determined from initial discussions between the Company’s and US Airways Group’s management and due diligence efforts. However, the detailed valuation studies necessary to arrive at the required estimates of the fair value of the US Airways Group assets to be acquired and the liabilities to be assumed, as well as the identification of all adjustments necessary to conform the Company’s and US Airways Group’s accounting policies, remain subject to completion because prior to the completion of the Merger, both companies were limited in their ability to share information. Valuations and additional analyses will be completed prior to filing the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2013. Finalization of the acquisition accounting may result in material differences from the estimates provided herein.

The Company is finalizing the appropriate accounting entries associated with consummation of the reorganization pursuant to the Plan. Final reorganization entries include accounting for the issuance of AAG equity securities to the Company’s stakeholders, labor unions, and certain employees in accordance with the Plan. In accordance with Accounting Standards Codification (“ASC”) 852, “Reorganizations,” as of the Effective Date of the Plan, the Company did not meet the criteria for and therefore will not adopt “fresh start” accounting because the reorganization value of the Company’s assets, as determined by the trading market price of US Airways Group Common Stock on the Effective Date, was greater than the total post-petition liabilities and expected allowed claims. As a result, the historical consolidated balance sheet and statements of operations of the Company used to prepare the Unaudited Pro Forma Condensed Combined Balance Sheet and the Unaudited Pro Forma Condensed Combined Statements of Operations as of and for the nine months ended September 30, 2013 and the year ended December 31, 2012 reflect on a pro forma basis only the effect of emergence by the Company and its debtor subsidiaries from Chapter 11 as if it had occurred, for purposes of the historical consolidated balance sheet of the Company, on September 30, 2013 immediately prior to the assumed closing of the Merger, and for purposes of the historical consolidated statement of operations of the Company, as of January 1, 2012 immediately prior to the assumed closing of the Merger and the beginning of the earliest period presented. The pro forma adjustments made to the Company’s liabilities are preliminary and subject to further adjustments. Accordingly, finalization of the adjustments associated with the Plan may result in material differences to the estimates provided herein.

These unaudited pro forma condensed combined financial statements have been developed from and should be read in conjunction with US Airways Group’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2013 and its Annual Report on Form 10-K for the fiscal year ended December 31, 2012, which are incorporated by reference into this Current Report on Form 8-K/A. The unaudited pro forma condensed combined financial statements are provided for illustrative purposes only and do not purport to represent what the actual consolidated results of operations or the consolidated financial position of the Company would have been had the Company emerged from Chapter 11 and the Merger occurred on the dates assumed, nor are they indicative of future consolidated results of operations or consolidated financial position.

Significant costs are expected to be incurred associated with integrating the operations of the Company and US Airways Group. The unaudited pro forma condensed combined financial statements are presented for illustrative purposes only and do not reflect the costs of any integration activities or benefits that may result from realization of future cost savings from operating efficiencies or revenue synergies that may result from the Merger. In addition, the unaudited pro forma condensed combined financial statements do not include the costs directly attributable to the transaction, employee retention and severance costs, or professional fees incurred by the Company or US Airways Group in connection with the Merger.

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UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET

SEPTEMBER 30, 2013

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UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

FOR THE NINE MONTHS ENDED SEPTEMBER 30, 2013

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UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS

FOR THE YEAR ENDED DECEMBER 31, 2012

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Notes to Unaudited Pro Forma Condensed Combined Financial Statements

Note 1. Basis of Presentation

The Merger will be accounted for as a business acquisition using the acquisition method of accounting in accordance with ASC 805, “Business Combinations,” with the Company considered the acquirer of US Airways Group.

The accompanying unaudited pro forma condensed combined financial statements present the pro forma consolidated financial position and results of operations of the Company based upon the historical financial statements of the Company and US Airways Group, after giving effect to the Company’s emergence from Chapter 11, the Merger, and adjustments described in these notes, and are intended to reflect the impact of the Merger on the Company’s historical consolidated financial statements.

The accompanying unaudited pro forma condensed combined financial statements are presented for illustrative purposes only and do not reflect the costs of any integration activities or benefits that may result from realization of future cost savings from operating efficiencies or revenue synergies that may result from the Merger.

The Unaudited Pro Forma Condensed Combined Balance Sheet gives effect to the Merger as if it had been consummated on September 30, 2013 and includes estimated pro forma adjustments for the preliminary valuations of net assets acquired and liabilities assumed. Actual acquisition accounting adjustments to be made in the December 31, 2013 financial statements will be subject to further revision as additional information becomes available and additional analyses are performed. The Unaudited Pro Forma Condensed Combined Statements of Operations gives effect to the Merger as if it had been consummated on January 1, 2012, the beginning of the earliest period presented. Finalization of the acquisition accounting may result in material differences to the estimates provided herein.

Acquisition Accounting Adjustments

Acquisition accounting adjustments include adjustments necessary to reflect the fair value of tangible and intangible assets and liabilities of US Airways Group and to conform the accounting policies of US Airways Group to those of the Company.

Fair Value Adjustments

The unaudited pro forma condensed combined financial statements reflect the preliminary assessment of fair values and lives assigned to the assets and liabilities being acquired. Fair value estimates were determined from initial discussions between the Company and US Airways Group management and due diligence efforts. The detailed valuation studies necessary to arrive at the required estimates of the fair value of US Airways Group’s assets to be acquired and the liabilities to be assumed, as well as the identification of all adjustments necessary to conform the Company’s and US Airways Group’s accounting policies, remain subject to completion. Significant assets and liabilities adjusted to fair value which are subject to finalization of valuation studies include spare parts and supplies, property and equipment, identifiable intangible assets, aircraft leases, deferred revenue and debt obligations.

Purchase Price

The Unaudited Pro Forma Condensed Combined Balance Sheet has been adjusted to reflect the fair value of the identifiable net assets acquired and the excess fair value of the consideration transferred in the Merger to goodwill. The fair value of the consideration transferred, or the purchase price, in these unaudited pro forma condensed combined financial statements is approximately $4.6 billion. This amount was derived as described below, based on the outstanding shares of US Airways Group Common Stock at December 9, 2013, the exchange ratio of one share of AAG Common Stock for each share of US Airways Group Common Stock, and a price per share of AAG Common Stock of $22.55, which represented the closing price of US Airways Group Common Stock on December 6, 2013, the last day such shares traded on the New York Stock Exchange. US Airways Group equity awards outstanding at the close of the Merger converted into equity awards with respect to AAG Common Stock. Vested equity awards held by employees of US Airways Group are considered part of the purchase price.

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The preliminary purchase price is calculated as follows:

The table below presents a summary of US Airways Group’s net assets based upon a preliminary estimate of their respective fair values as of September 30, 2013:

Upon completion of the fair value assessment, the Company anticipates that the ultimate fair values of the net assets acquired will differ from the preliminary assessment outlined above and that difference could be material. Generally, changes to the initial estimates of the fair value of the assets and liabilities will be recorded as adjustments to those assets and liabilities and residual amounts will be allocated to goodwill.

Other Merger Adjustments

US Airways Group’s pilots and all labor groups at the Company voted to ratify memorandums of understanding (“MOUs”) that became effective upon the closing of the Merger. The pro forma financial statements reflect the impacts of the higher wage rates and modifications to certain benefits associated with these MOUs in all periods presented.

Other merger adjustments also include the elimination of the Company’s reorganization items, net and US Airways Group’s merger transactions costs.

Conforming Reclassifications

The unaudited pro forma condensed consolidated income statements reflect certain reclassifications between various categories of the Company’s and US Airways Group’s financial statement line items. These reclassifications do not impact the unaudited pro forma condensed consolidated net income. These reclassifications are comprised principally of the following items:

Items Excluded from the Unaudited Pro Forma Condensed Combined Financial Statements

The unaudited pro forma condensed combined financial statements do not include any adjustments for liabilities that may result from integration activities, as management is in the process of making these assessments. However, significant liabilities ultimately may be recorded for employee severance and/or relocation, costs of vacating some facilities, and costs associated with other exit and integration activities.

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The Company anticipates that the Merger will result in significant future annual revenue, operating, and cost synergies that would be unachievable without having completed the Merger. No assurance can be made that the Company will be able to achieve these future revenue, operating, and cost synergies, and the synergies have not been reflected in the unaudited pro forma condensed combined historical financial statements. In addition, annualized benefits that the Company achieved during the Chapter 11 process have not been reflected in the unaudited pro forma condensed combined financial statements.

The Unaudited Pro Forma Condensed Combined Statement of Operations does not include any material non-recurring charges that will arise as a result of the Merger.

Note 2. Pro Forma Adjustments

The unaudited pro forma condensed combined financial statements reflect the following:

The following table presents information about the identifiable intangibles:

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Additionally, $1.2 billion of liabilities subject to compromise were reclassified to pensions and post-retirement benefits to reinstate certain post-retirement benefit liabilities upon emergence from Chapter 11.

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