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

🇺🇸 N37342 - Boeing 737MAX 8 - United Airlines UAL1620/UA1620 (SEA-SFO-RDU) - 4.8 mi away @ 40725 ft, heading E at 528 mph. Spotted 5x before! [02:24:08 AM CDT] #A441EF #N37342 #B38M #UNITED #UAL1620 #UA1620 #ADSB #ADSBbot