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

🇺🇸 N951XV - Airbus A321 253NSL - American Airlines AAL2911/AA2911, Philadelphia (PHL) to Phoenix Sky Harbor (PHX) - 4.5 mi away @ 36250 ft, heading W at 494 mph. Spotted for first time! [10:21:39 PM CDT] #AD3A7F #N951XV #A21N #AMERICAN #AAL2911 #AA2911 #ADSB #ADSBbot