What is the cancellation policy for American Airlines? https://support.google.com/phoneapp/thread/307322561?hl=en&sjid=11445014996102864754-AP American Airlines provides a 24-hour cancellation policy U+【+????-????????????-????????????-????????????????】 . If you need to cancel your American Airlines flight, you can do so without a fee within 24 hours after your flight. For your convenience, cancellations can be made either online or by contacting their support at U+{{+????-????????????-????????????-????????????????}}.