American Airlines Pet Policy – Your Booking

Travelers carrying their pets must carry a hard or soft shell container depending on whether they are traveling on American Eagle or American Airlines.

Hard shell containers must be no larger than 19" x 13" x 9" on mainline routes and no larger than 12" x 8" on American Eagle routes. American Airlines' pet policy requires that you bring a soft carrier that measures no larger than 18" x 11" x 11" on both flights.