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

🇺🇸 N200SY - Embraer EMB-175 LR - United Express SKW4638/OO4638, Chicago O'Hare (ORD) to City Of Colorado Springs Municipal (COS) - 8.5 mi away @ 31600 ft, heading SW at 505 mph. Spotted 33x before! [11:32:03 PM CDT] #A193AA #N200SY #E75L #SKYWEST #SKW4638 #OO4638 #autopilot #ADSB #ADSBbot