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

🇺🇸 N125SY - Embraer EMB-175 LR - United Express SKW5766/OO5766, Chicago O'Hare (ORD) to Northwest Arkansas Ntl (XNA) - 18.7 mi away @ 35075 ft, heading SW at 513 mph. Spotted 30x before! [01:56:02 PM CDT] #A067EC #N125SY #E75L #SKYWEST #SKW5766 #OO5766 #autopilot #ADSB #ADSBbot