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

🇺🇸 N152SY - Embraer EMB-175 LR - United Express SKW6939/OO6939 - 3.5 mi away @ 7575 ft, heading SW at 335 mph. Spotted 42x before! [04:38:34 PM CDT] #A0D344 #N152SY #E75L #SKYWEST #SKW6939 #OO6939 #TakingOff #ADSB #ADSBbot