American has 303 Boeing 737-800 aircraft with 172 seats, 16 First Class 24 Main Cabin Extra, and 132 Main Cabin.

AA retired 1 older 737s. For the full list of retired 737s go to Boeing 737.

738K 3AG-3LB

738R Advanced Performance 3LC-3PX

The 738K/Rs all have Boeing Sky Interior, Boeing's Space Bins, and power ports/USB ports are at every seat.  All 737s are equipped with ViaSat satellite Wi-Fi.