American Airlines cancellation policy provides the conditions for fully cancelling a booking with them due to unfavorable conditions. However, if you want to change flight on American Airlines without any cost, then you can just cancel it within 24 hours from original booking for a full refund. Besides, you can contact American Airlines call center for grabbing additional information regarding any of the reservation facility they offer.
Read more- https://www.cheapflightinfo.com/travel/flight/american-airlines-cancellation-policy

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