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

🇺🇸 N47284 - Boeing 737MAX 8 - United Airlines UAL1325/UA1325 (LGA-DEN-PDX) - 4.2 mi away @ 36000 ft, heading WSW at 502 mph. Spotted 11x before! [08:37:32 PM CDT] #A5CC15 #N47284 #B38M #UNITED #UAL1325 #UA1325 #ADSB #ADSBbot