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

🇺🇸 N877AS - Bombardier CRJ 200ER - Skywest Charter SCW3914, Stillwater Regional (SWO) to South Bend (SBN) - 4.3 mi away @ 36375 ft, heading ENE at 525 mph. Spotted 2x before. [04:29:07 PM CST] #AC1068 #N877AS #CRJ2 #CHARTER_WEST #SCW3914 #ADSB #ADSBbot