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

🇺🇸 N450AN - Airbus A321 253NXSL - American Airlines AAL1981/AA1981 (PHL-SAN-PHL) - 4.0 mi away @ 33350 ft, heading WSW at 509 mph. Spotted 11x before! [07:26:59 PM CDT] #A57229 #N450AN #A21N #AMERICAN #AAL1981 #AA1981 #ADSB #ADSBbot