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

🇺🇸 N773XF - Airbus A319 111 - American Airlines AAL479Q/AA479Q (ORD-BOS-ORD) - 3.5 mi away @ 27650 ft, heading NNW at 534 mph. Spotted 30x before! [07:56:11 AM CDT] #AA763F #N773XF #A319 #AMERICAN #AAL479Q #AA479Q #ADSB #ADSBbot