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

🇺🇸 N539UW - Airbus A321 231 - American Airlines AAL2966/AA2966, Orlando (MCO) to Chicago O'Hare (ORD) - 3.5 mi away @ 26625 ft, heading NNE at 584 mph. Spotted 19x before. [12:22:11 PM CST] #A6D3B3 #N539UW #A321 #AMERICAN #AAL2966 #AA2966 #ADSB #ADSBbot