Texas News American Plans Flights With Boeing 737 MAX In December; Southwest Not Until Next Year KWBU | By Texas Standard Published November 20, 2020 at 8:31 AM CST Twitter LinkedIn Email Listen • 1:16 Associated Press Southwest Airlines Boeing 737 Max aircraft sit on the tarmac at Phoenix Sky Harbor International Airport on March 13. The 737 Max was grounded worldwide following a pair of deadly crashes. Both North Texas-based companies sought to reassure passengers the planes will be fully inspected and tested.