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

🇺🇸 N455UA - Airbus A320 232 - United Airlines UAL8179/UA8179, Denver (DEN) to Philadelphia (PHL) - 4.4 mi away @ 35950 ft, heading SW at 508 mph. Spotted 20x before! [10:41:14 PM CDT] #A58672 #N455UA #A320 #UNITED #UAL8179 #UA8179 #ADSB #ADSBbot