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 GJS4429/G74429, Birmingham-Shuttlesworth (BHM) to Chicago O'Hare (ORD) - 4.3 mi away @ 33475 ft, heading NNE at 516 mph. Spotted 28x before. [11:05:06 AM CST] #A68D44 #N521GJ #CRJ7 #LINDBERGH #GJS4429 #G74429 #ADSB #ADSBbot