Originally Posted by
Often1
Your flight may be overbooked, but it can't be oversold until more properly ticketed passengers show up at the gate by T-15 than there are seats. Most often, overbooked flights wind up not oversold.
Most of the time when I volunteer for VDB, they do not need me. Revenue management is really good at estimating the number of no shows. Since they know how good they at this are the only time they will entertain moving you to an earlier flight is if they are confident there will be a serious oversold situation.