WASHINGTON, May 21 (Reuters) - The trade group

representing major U.S. airlines on Tuesday urged the Federal

Aviation Administration to take swift action to address a

long-standing air traffic controller shortage ahead of the start

of the busy summer travel season.

Airlines for America, whose members includes American

Airlines ( AAL ), Delta Air Lines ( DAL ), United Airlines

and Southwest Airlines ( LUV ), said the "lack of (air

traffic control) staffing has a direct impact on airline

operations and the traveling public."

FAA Deputy Administrator Katie Thomson rejected the

criticism saying the agency "is focused on the safety of the

flying public. Rather than funding publicity stunts, we'd

welcome support in a serious effort to help recruit more

controllers."