In August, a Continental Express flight was diverted to Rochester, Minnesota at midnight because of stormy weather.
The passengers were forced to stay on board all night because there was no security in the terminal.
The plane ran out of food and drink, and bathrooms overflowed. The DOT fined Continental and ExpressJet a combined $100,000.
Mesaba Airlines was fined $75,000 because its employees refused to open the terminal doors.
Sen. Barbara Boxer renewed her call for a passenger bill of rights to prevent ordeals like this one.