Originally Posted by
dulciusexasperis
Am I missing something here? All carry-on bags must be able to fit under the seat.
That's definitely not true. AA's policy is 1 personal item and 1 carry on.
Personal items must fit under the seat in front. Carry on items do not have to fit under the seat in front. The dimensions allowed for a carry on are larger than those for a personal item and larger than fits under the seat.