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

🇺🇸 N37437 - Boeing 737NG 924ER/W - United Airlines UAL2081/UA2081 (LAX-IAD-ATL) - 4.0 mi away @ 35050 ft, heading E at 665 mph. Spotted 10x before. [12:03:02 PM CST] #A44588 #N37437 #B739 #UNITED #UAL2081 #UA2081 #ADSB #ADSBbot