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

🇺🇸 N740MR - EMBRAER ERJ 170-100 SE - Envoy Air ENY4037/MQ4037 (ORD-DFW-ORD) - 3.7 mi away @ 30250 ft, heading SW at 459 mph. Spotted 10x before. [01:25:50 PM CST] #A9F3AD #N740MR #E170 #ENVOY #ENY4037 #MQ4037 #autopilot #ADSB #ADSBbot