More than 1,000 people flown in to the small Colorado mountain town of Crested Butte for a Bud Light promotion have left after long flight delays.

The manager of the nearby small airport in Gunnison, Rick Lamport, said the last of the chartered flights took off at 10 p.m. Sunday, three hours late, because of problems with security screenings at the end of the "Whatever USA" weekend party.

Lamport said passengers were supposed to be screened by a private company before boarding buses to the airport. He said the system broke down, and event organizers asked the airport's screeners to take over around midday, creating a bottleneck.

The delays caused some to miss connecting flights. Organizers ordered pizza and other takeout food for those waiting to leave.