Originally Posted by
Acid
Usually with AA, I've always seen a few window /good seats open up at anytime as upgrades are confirmed even upto 20 mins before the flight and you can change your seat right upto boarding in most cases on the app(I've done it several times while in the lounge). What annoys me most about BA is you cannot change seats online once you are "checked in"
You can change your seat once you are checked in, just don't click print boarding pass and you can change it until you get to a point where you need the BP.