American Airlines allows for one free checked bag on domestic flights and two on international journeys. Carry-on luggage must fit in the overhead bin or under the seat and follow size restrictions. Additional bags or overweight luggage will incur extra charges. If you have questions or need assistance related to American Airlines Baggage Policy, you can visit the Airlines Pet Policy. Additionally, you can contact at 800-433-7300 or +1-844-902-4930 (OTA Skip-Waiting).