However, when contacted by The Daily Telegraph, spokespeople for both O'Hare and LAX, as well as representatives from the travel industry, denied that airports had been hit by delays.

"We haven't had any slowdowns at all," said Marshall Lowe, a spokesman for LAX. Mr Lowe said that he had been on duty over the weekend and received no reports of unusual security delays.

DeAllous Smith, a spokesman for Hartfield-Jackson, said: "There have been no abnormally long lines at the security checkpoint nor unusual aircraft delays at Hartsfield-Jackson Atlanta International Airport as a result of sequestration."