Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N8811L - Boeing 737MAX 8 - Southwest Airlines SWA3204/WN3204, Harry Reid (LAS) to Chicago Midway (MDW) - 4.4 mi away @ 37000 ft, heading NE at 582 mph. Spotted 79x before! [08:38:12 PM CDT] #AC2412 #N8811L #B38M #SOUTHWEST #SWA3204 #WN3204 #ADSB #ADSBbot