American Airlines Airbus A321 sporting the special 'Stand Up To Cancer' livery, seen at the gate on a cloudy day.

American Airlines Boeing 737-800 (N973AN) in special Oneworld alliance livery, seen at the gate with other American and Aer Lingus jets.

American Airlines Boeing 737-800 in the rare '100 Years Strong' special livery, seen at the gate on a bright afternoon.

An American Airlines Boeing 737-800 in retro AirCal heritage livery at the gate, flanked by standard AA tails at a busy airport terminal.

A busy ramp scene with multiple American Airlines Boeing 737-800s at the gate in Chicago O'Hare, joined by an Aer Lingus A330 and British Airways 787 in the background.

American Airlines Boeing 737-800 in oneworld alliance livery awaits departure at DFW.

Spotted at Chicago O’Hare.

Pretty-ful tails! ✈️

American Airlines Boeing 737-800 in striking TWA retro livery at the gate, with modern AA jets in the background.

American Airlines meets old livery TWA! Wingtips meets tail!

Picture postcard day at Chicago O’Hare! ✈️

American Airlines (ORD) getting ready to land at LHR.

Retro American Airlines. Livery. ✈️

The distinct red, white, and blue 'Eagle' tail is a nod to American's pre-merger branding; such retro liveries are cherished among spotters.

Raindrops on the terminal window add mood to the photo, while the double rainbow makes this a particularly striking airport scene. The K6 gate sign suggests this photo was taken at a major US hub.