American Airlines allows one free carry-on and one personal item per traveler. The carry-on size limit is 22 x 14 x 9 inches, including handles and wheels. Personal items like backpacks or purses must fit under the seat. Overhead bin space is first-come, so early boarding improves chances. Larger bags must be checked, with fees applied. To confirm whether your bag qualifies as a carry-on or for guidance on exceptions like strollers or instruments, call American Airlines directly at 831-298-4213 for assistance before heading to the airport.