from web site
American Airlines Refund Policy for Delayed Flights
Travelers who experience flight delays have recourse under American Airlines' Refund Policy. When a passenger's original plans are altered as a result of unforeseen disruptions due to weather, mechanical issues, etc., they may seek refunds, alternative arrangements, etc., through a Refund Request. By understanding the provisions of the Refund Request, travelers can make informed decisions to help prevent them from overreacting due to travel disruptions.
link:-https://lowestairlinesdeal.com/american-airlines-check-in-policy/