Chicago -- U.S. regulators say they will decide whether to fine United Airlines up to $27,500 per passenger for leaving passengers in idling planes more than three hours.
Chicago-based United operated four of the five U.S. flights delayed in May beyond the new limit on tarmac time set by the U.S. Department of Transportation, the Chicago Tribune reported.
Delta Air Lines operated the fifth flight, which took off from Atlanta 2 minutes after the three-hour cutoff point, federal data indicated.
The United delays occurred May 26 after thunderstorms halted take-offs and landings at Denver International Airport, United spokeswoman Jean Medina said. Tarmac delays for the four flights ranged from 3 hours, 10 minutes to 4 hours, 41 minutes, DOT data indicated.