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

🇺🇸 N967AN - Boeing 737NG 823/W - American Airlines AAL2121/AA2121, Kansas City (MCI) to Chicago O'Hare (ORD) - 4.1 mi away @ 37125 ft, heading E at 578 mph. Spotted 43x before! [06:17:45 AM CDT] #AD7634 #N967AN #B738 #AMERICAN #AAL2121 #AA2121 #ADSB #ADSBbot