American Airlines Allows Passengers To Cancel Their Flight Tickets Within 24 Hours Of Purchase For A Full Refund. American Airlines Cancellation Policy After That Window, Cancellation Fees And Restrictions May Apply Depending On The Fare Type And Destination. Passengers Can Cancel Their Flight Online On The American Airlines Website, Through The Mobile App, Or By Contacting Customer Service. If The Airline Cancels The Flight Due To Unforeseen Circumstances, Passengers Are Eligible For A Full Refund Or The Option To Rebook On A Different Flight. It Is Recommended To Check The Specific Cancellation Policy When Booking The Flight.