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

🇺🇸 N14524 - Airbus A321 271NXSL - United Airlines UAL791/UA791, Chicago O'Hare (ORD) to Denver (DEN) - 8.9 mi away @ 38100 ft, heading WSW at 535 mph. Spotted 2x before! [08:33:04 AM CDT] #A0B7FE #N14524 #A21N #UNITED #UAL791 #UA791 #ADSB #ADSBbot