**Exhibit 31.4**
**CFO CERTIFICATION**
I, Derek J. Kerr, certify that:
1. I have reviewed this Quarterly Report on Form 10-Qof US Airways, Inc.;
2. Based on my knowledge, this report does not containany untrue statement of a material fact or omit to state a material fact necessary to make the statements made, inlight of the circumstances under which such statements were made, not misleading with respect to the period covered bythis report;
3. Based on my knowledge, the financial statements,and other financial information included in this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4. The registrant’s other certifying officer(s)and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange ActRules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange ActRules 13a-15(f) and 15d-15(f)) for the registrant and have:
(a) Designed such disclosure controlsand procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure thatmaterial information relating to the registrant, including its consolidated subsidiaries, is made known to us by otherswithin those entities, particularly during the period in which this report is being prepared;
(b) Designed such internal controlover financial reporting, or caused such internal control over financial reporting to be designed under oursupervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation offinancial statements for external purposes in accordance with generally accepted accounting principles;
(c) Evaluated the effectiveness ofthe registrant’s disclosure controls and procedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based onsuch evaluation; and
(d) Disclosed in this report anychange in the registrant’s internal control over financial reporting that occurred during the registrant’smost recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that hasmaterially affected, or is reasonably likely to materially affect, the registrant’s internal control overfinancial reporting; and
5. The registrant’s other certifying officer(s)and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of the registrant’s board of directors (or persons performingthe equivalent functions):
(a) All significant deficiencies andmaterial weaknesses in the design or operation of internal control over financial reporting which are reasonably likelyto adversely affect the registrant’s ability to record, process, summarize and report financial information; and
(b) Any fraud, whether or notmaterial, that involves management or other employees who have a significant role in the registrant’s internalcontrol over financial reporting.
Date: April 22, 2009
**/**s/ Derek J.Kerr