The best American Airlines domestic aircraft is the one that it flies on premium cross-country routes like New York to Los Angeles and San Francisco. The Airbus A321T (T for transcon) features first class, business class and economy.
However that plane is on the way out, with the premium cabins being dismantled and even coach being made worse. The first of these – the aircraft registered as N115NN – has already been converted into a standard domestic plane with regular first class, TVs removed, and less legroom. It will soon re-enter service as a stripped-down experience.