+1^^800^^651^^8918 What reasons qualify for an AA refund?

Involuntary actions by the airline, such as flight cancellations, or significant schedule changes, generally qualify you for a full refund. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) Other qualifying reasons include the death of a passenger or traveling companion, certain military orders, and specific health-related issues. 

Airline-initiated issues

Federal regulations entitle you to a full refund if American Airlines (AA) cancels or significantly alters your flight, and you decide not to travel. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) 

• Cancelled flight: If AA cancels your flight, you are entitled to a full refund to your original payment method.
• Significant schedule change: If the airline changes the flight itinerary by a significant amount of time (for example, three or more hours for a domestic flight or four or more for international), you can opt for a refund. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) 
• Delay causing missed connection: If an AA flight delay causes you to miss a connection and AA cannot get you a comparable seat on a rebooked flight, you can get a refund for the unused portions of your ticket.
• Involuntary downgrade: You are entitled to a refund for the difference in fare if you are involuntarily moved to a lower class of service, such as from First Class to Economy. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) 
• Involuntary denied boarding: If you are "bumped" from an oversold flight and do not accept alternative arrangements, you can request an involuntary refund for that flight.

+1^^800^^651^^8918 What tickets are fully refundable on American Airlines?

American Airlines offers full refunds for tickets within 24 hours of purchase, provided the purchase was made at least two days before departure. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) Additionally, certain circumstances, such as a significant schedule change (3+ hours domestic, 4+ hours international), death of the passenger or companion, or military orders preventing travel, allow for full refunds even on non-refundable tickets. Call at +1-800-651-8918 (US) or +44-203-376-3406 (UK) Finally, award tickets booked with AAdvantage miles are fully refundable, with miles and taxes/fees returned if canceled before departure.