Did you know that if you check in using American’s mobile app, and wish to use a mobile boarding pass, you have to pull it up prior to the start of boarding? That’s apparently “The infuriating rule American Airlines won’t tell you about until it’s too late” according to a columnist for the Washington Post.
It’s likely no one is surprised that there’s a cutoff time for check-in. It’s a reasonable rule, in my opinion, so that seats assigned to people who aren’t going to show up for their flight may be given to others that are standing by and want to fly.