Home Business Southwest to keep Boeing 737 MAX off schedules through May instead of... Business Southwest to keep Boeing 737 MAX off schedules through May instead of April 20: company memo By Genpie - March 31, 2019 175 0 Facebook Twitter Google+ Pinterest WhatsApp Southwest Airlines Co said on Friday it was pulling its Boeing Co 737 MAX jets from flight schedules through May, extending its earlier timeline from April 20, according to a company memorandum seen by Reuters.