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

🇺🇸 N154SY - Embraer EMB-175 LR - United Express SKW5869/OO5869, San Antonio (SAT) to Chicago O'Hare (ORD) - 4.4 mi away @ 38200 ft, heading NNE at 541 mph. Spotted 23x before! [07:00:46 PM CDT] #A0DAB2 #N154SY #E75L #SKYWEST #SKW5869 #OO5869 #autopilot #ADSB #ADSBbot