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

🇺🇸 N8923Q - Boeing 737MAX 8 - Southwest Airlines SWA677/WN677, Denver (DEN) to Washington Dulles (IAD) - 4.3 mi away @ 36675 ft, heading E at 621 mph. Spotted 11x before! [12:34:13 PM CST] #AC4F92 #N8923Q #B38M #SOUTHWEST #SWA677 #WN677 #ADSB #ADSBbot