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

🇺🇸 N459AN - Airbus A321 253NXSL - American Airlines AAL1391/AA1391, Philadelphia (PHL) to Phoenix Sky Harbor (PHX) - 4.4 mi away @ 35000 ft, heading W at 489 mph. Spotted 16x before! [08:14:21 AM CST] #A59398 #N459AN #A21N #AMERICAN #AAL1391 #AA1391 #ADSB #ADSBbot