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

🇺🇸 N748RR - Embraer EMB-170 SE - American Eagle ENY3920/MQ3920 (ORD-OKC-ORD) - 4.3 mi away @ 37150 ft, heading WSW at 398 mph. Spotted 7x before! [05:40:28 PM CDT] #AA11C9 #N748RR #E170 #ENVOY #ENY3920 #MQ3920 #autopilot #ADSB #ADSBbot