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

🇺🇸 N873NN - Boeing 737NG 823/W - American Airlines AAL1247/AA1247 (ORD-MCO-ORD) - 4.7 mi away @ 37550 ft, heading NNE at 586 mph. Spotted 39x before! [09:00:22 PM CDT] #AC02B4 #N873NN #B738 #AMERICAN #AAL1247 #AA1247 #ADSB #ADSBbot