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

🇺🇸 N8771D - Boeing 737MAX 8 - Southwest Airlines SWA2740/WN2740, Harry Reid (LAS) to Baltimore/Washington Thurgood Marshall (BWI) - 4.3 mi away @ 36350 ft, heading E at 610 mph. Spotted 36x before! [09:33:24 PM CST] #AC12D6 #N8771D #B38M #SOUTHWEST #SWA2740 #WN2740 #ADSB #ADSBbot