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.

Aeromexico Boeing 737-800 taxiing on a sunny day, a workhorse of the Mexican carrier's short and medium-haul operations.

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.

A rare sight: Alaska Airlines Boeing 737-800 N553AS in the special 'Star Wars Galaxy’s Edge' Disneyland livery taxiing at the airport.

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!

Norwegian Airlines Gatwick Airport (LGW)

Retro American Airlines. Livery. ✈️

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.