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

🇺🇸 N89321 - Embraer EMB-175 LR - United Express ASH6216/YV6216, George Bush Intcntl/Houston (IAH) to Detroit Metro Wayne County (DTW) - 4.4 mi away @ 34850 ft, heading NE at 537 mph. Spotted 22x before! [01:55:09 PM CDT] #AC5331 #N89321 #E75L #AIR_SHUTTLE #ASH6216 #YV6216 #autopilot #ADSB #ADSBbot