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

🇺🇸 N521GJ - Bombardier CRJ 700 702ER - United Express GJS4426/G74426, Chicago O'Hare (ORD) to Northwest Arkansas Ntl (XNA) - 3.4 mi away @ 28600 ft, heading SW at 465 mph. Spotted 29x before. [04:36:50 PM CDT] #A68D44 #N521GJ #CRJ7 #LINDBERGH #GJS4426 #G74426 #ADSB #ADSBbot