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

🇺🇸 N991AN - Boeing 737NG 823/W - American Airlines AAL1620/AA1620, Dallas-Fort Worth (DFW) to Chicago O'Hare (ORD) - 4.3 mi away @ 35000 ft, heading NE at 545 mph. Spotted 32x before! [10:23:27 PM CDT] #ADD667 #N991AN #B738 #AMERICAN #AAL1620 #AA1620 #ADSB #ADSBbot