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

🇺🇸 N37547 - Boeing 737MAX 9 - United Airlines UAL742/UA742, Harry Reid (LAS) to Washington Dulles (IAD) - 4.8 mi away @ 36900 ft, heading E at 619 mph. Spotted 11x before! [10:19:18 PM CST] #A44962 #N37547 #B39M #UNITED #UAL742 #UA742 #ADSB #ADSBbot