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

🇺🇸 N8860S - Boeing 737MAX 8 - Southwest Airlines SWA2340/WN2340, Austin-Bergstrom (AUS) to Chicago Midway (MDW) - 4.7 mi away @ 38500 ft, heading NE at 512 mph. Spotted 59x before! [05:56:45 PM CDT] #AC3688 #N8860S #B38M #SOUTHWEST #SWA2340 #WN2340 #ADSB #ADSBbot