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

🇺🇸 N853UA - Airbus A319 131 - United Airlines UAL503/UA503 (MSY-ORD-CMH) - 4.3 mi away @ 36000 ft, heading NNE at 532 mph. Spotted 25x before! [12:05:38 PM CST] #ABB440 #N853UA #A319 #UNITED #UAL503 #UA503 #ADSB #ADSBbot