EXHIBIT 31.4 CERTIFICATION I, Ronald E. Stanley, certify that: 1. I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K of US Airways Group, Inc.; and 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. /s/ Ronald E. Stanley - ------------------------------------- Name: Ronald E. Stanley Title: Chief Financial Officer Date: August 10, 2005 18