Originally Posted by
DFW Refugee
Actually:
"In the event of a delayed flight, the reservation will be held until 15 minutes prior to the revised departure time."
FOM Chapter 26, Section 4.
The funny thing about that in JFK is that it can still say scheduled time on the board but the gate computer is 5 minutes off of that. So you can come up at 15 prior to scheduled departure time, the time on the board, and they could have already given your jumpseat away. When you point out that it's not 15 prior to scheduled departure the gate agent will show you their countdown clock on their screen which is 5 minutes off, and the only clock that really counts, and it is showing a red 10 minutes which means they need to shut the jetway door.
Moral of the story try not to make it close.