🇺🇸 N8858K - Boeing 737MAX 8 - Southwest Airlines SWA337/WN337, San Antonio (SAT) to Chicago Midway (MDW) - 5.2 mi away @ 40175 ft, heading NE at 536 mph. Spotted 88x before. [04:41:33 PM CDT] #AC33E2 #N8858K #B38M #SOUTHWEST #SWA337 #WN337 #ADSB #ADSBbot