Originally Posted by
sbm12
You can change to the 7pm flight at 7am (within 12 hours of the new departure time AND within 24 hours of scheduled flight); at 5am you'd be 14 hours from the new departure time.
I have no idea when you'll be put on the upgrade list, but that will only be the third tie-break after status and fare class, so I wouldn't sweat that too much. As long as you're on the list at T-30 or so when they start clearing upgrades at the gate you'll be fine.
Thanks. The reason why I ask is that in the event I have a connection from an int'l destination, I'd want to be put on the upgrade list prior to actually arriving in the airport of my connection, in case I have a tight connection.