Gate agents will now be asked to use their judgment about whether a bag is too big and needs to be checked -- and if they're not sure, to err on the side of the customer.

American Airlines passengers can check their flight status online at aa.com or via the airline's mobile app. Flight status can be tracked by flight number or city pair. See real-time flight tracking ...

The move is part of a larger effort to get passengers boarded faster. But travelers with lots of bags may no longer make it ...