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

🇺🇸 N878RW - Embraer EMB-170 LR - Delta Connection RPA5603/YX5603, Laguardia (LGA) to St Louis Lambert (STL) - 3.4 mi away @ 3150 ft, heading N at 304 mph. Spotted once before. [08:55:38 PM CDT] #AC159A #N878RW #E170 #BRICKYARD #RPA5603 #YX5603 #autopilot #Landing #Arrival #ADSB #ADSBbot