🇺🇸 N8939Q - Boeing 737MAX 8 - Southwest Airlines SWA2150/WN2150, Chicago Midway (MDW) to Phoenix Sky Harbor (PHX) - 4.7 mi away @ 38175 ft, heading SW at 526 mph. Spotted 37x before. [10:29:37 AM CDT] #AC541B #N8939Q #B38M #SOUTHWEST #SWA2150 #WN2150 #ADSB #ADSBbot