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

🇺🇸 N156UW - Airbus A321 211 - American Airlines AAL2344/AA2344, Denver (DEN) to Philadelphia (PHL) - 4.9 mi away @ 34800 ft, heading ESE at 540 mph. Spotted 13x before! [12:16:17 PM CDT] #A0E250 #N156UW #A321 #AMERICAN #AAL2344 #AA2344 #ADSB #ADSBbot