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

🇺🇸 N27251 - Boeing 737MAX 8 - United Airlines UAL2497/UA2497 (PHX-IAD-ORD-DTW) - 4.7 mi away @ 39400 ft, heading E at 533 mph. Spotted 8x before! [01:26:42 PM CDT] #A2B10B #N27251 #B38M #UNITED #UAL2497 #UA2497 #ADSB #ADSBbot