Originally Posted by
newsmanhoss
Even if the seat maps are full, things can change at the last minute...there could be no-shows or a change in travel plans. There's always that outside chance that one can open up, so it never hurts to ask.
This is especially true if any of the Biz Class seats were showing as occupied more than one day before the flight - these are often paid Biz Class seats; their occupants can change their ticket without penalty.