EXHIBIT 31.3 CERTIFICATION I, Bruce R. Lakefield, certify that: 1. I have reviewed this Amendment No. 1 to the Quarterly Report on Form 10-Q 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/ Bruce R. Lakefield - ------------------------------------- Name: Bruce R. Lakefield Title: Chief Executive Officer Date: August 10, 2005 5