When corporate security realized they had a possible crime on their hands, the man had left the terminal for his re-booked flight, police said.
Corporate security contacted Philadelphia police, who found and arrested the man at his new terminal, Sullivan said.
The original U.S. Airways flight departed.
Was the act a fit of pique or a prank?
Police say they don't know whether the suspect was simply a prankster trying to mimic Frank W. Abagnale Jr. or he had other motives. (Abagnale -- who infamously eluded authorities for years in the 1960s while posing as, among other things, an airline pilot, a doctor and an attorney -- was the inspiration for the 2002 film "Catch Me If You Can," starring DiCaprio and Tom Hanks).
Despite the man's comment to police that he hates Americans, a federal law enforcement official said that investigators so far have not found any link to terrorism.
Air France confirmed that none of its employees had tried to board the Charlotte-bound flight. Jernnard wasn't wearing the airline's official uniform and badge.
The Federal Aviation Administration and the Transportation Security Administration wouldn't discuss the case and referred calls to the FBI.