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

🇺🇸 N47343 - Boeing 737MAX 8 - United Airlines UAL2204/UA2204 (TPA-EWR-SNA) - 4.7 mi away @ 38025 ft, heading W at 531 mph. Spotted once before! [03:21:23 PM CDT] #A5CF3F #N47343 #B38M #UNITED #UAL2204 #UA2204 #ADSB #ADSBbot