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

🇺🇸 N8770Q - Boeing 737MAX 8 - Southwest Airlines SWA3949/WN3949 (ATL-OMA-PHX) - 4.8 mi away @ 40225 ft, heading NW at 439 mph. Spotted 36x before! [08:29:22 AM CST] #AC12BE #N8770Q #B38M #SOUTHWEST #SWA3949 #WN3949 #STL #ADSB