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

🇺🇸 N939AN - Boeing 737NG 823/W - American Airlines AAL3018/AA3018, Charlotte/Douglas (CLT) to Chicago O'Hare (ORD) - 4.4 mi away @ 36775 ft, heading NNE at 572 mph. Spotted 26x before! [03:18:21 PM CDT] #AD0725 #N939AN #B738 #AMERICAN #AAL3018 #AA3018 #ADSB #ADSBbot