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

🇺🇸 N170PQ - Bombardier CRJ 900 LR NG - Delta Connection SKW3884/OO3884 (MSP-STL-MSP) - 3.7 mi away @ 15150 ft, heading NW at 393 mph. Spotted for first time! [02:21:23 PM CDT] #A11A81 #N170PQ #CRJ9 #SKYWEST #SKW3884 #OO3884 #ADSB #ADSBbot