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

🇺🇸 N790MK - Embraer EMB-170 SE - American Eagle ENY3848/MQ3848 (ORD-AUS-ORD) - 4.1 mi away @ 35025 ft, heading SW at 468 mph. Spotted 34x before. [08:20:59 AM CDT] #AAB922 #N790MK #E170 #ENVOY #ENY3848 #MQ3848 #autopilot #ADSB #ADSBbot