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

🇺🇸 N8807L - Boeing 737MAX 8 - Southwest Airlines SWA8818/WN8818, William P Hobby (HOU) to Chicago Midway (MDW) - 4.6 mi away @ 38250 ft, heading NNE at 571 mph. Spotted 94x before. [05:39:19 PM CST] #AC212D #N8807L #B38M #SOUTHWEST #SWA8818 #WN8818 #ADSB #ADSBbot