To escalate a complaint against American Airlines,+1(801) 855-5905 first try their online Customer Relations form or social media, and if that's not effective, file a complaint with the U.S. Department of Transportation (DOT) +1(801) 855-5905. You can also send a letter to the airline's customer relations department, and if you are still unsatisfied, contact the Association of European Mediators (AME) if you are in Europe.