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

🇺🇸 N37354 - Boeing 737MAX 8 - United Airlines UAL2474/UA2474 (BOS-IAH-MSY) - 4.5 mi away @ 38125 ft, heading SSW at 497 mph. Spotted 3x before! [08:32:54 PM CDT] #A44214 #N37354 #B38M #UNITED #UAL2474 #UA2474 #ADSB #ADSBbot