Originally posted by avek00:
Not necessarily. Airlines usually cut off advance seat assignments when the flight is about 60%-70% full. The rest are held for airport check-in only. The best way to find out if a flight is overbooked is by calling Reservations. The agent might even "slip" the boarding total numbers to you.
True of most airlines, but I don't think that holds true of US. I've seen plenty of US Express flights which were the flight was authorized to 40 or so and 36 seats were sold. Only one little green seat was available.