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

🇺🇸 N17336 - Boeing 737MAX 8 - United Airlines UAL2199/UA2199 (IAH-LGA-ORD) - 8.6 mi away @ 36550 ft, heading ENE at 551 mph. Spotted 6x before! [08:40:33 AM CDT] #A12732 #N17336 #B38M #UNITED #UAL2199 #UA2199 #ADSB #ADSBbot