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

🇺🇸 N17349 - Boeing 737MAX 8 - United Airlines UAL211/UA211 (YVR-EWR-IAH) - 4.4 mi away @ 35875 ft, heading WSW at 546 mph. Spotted 5x before! [07:10:13 PM CDT] #A12758 #N17349 #B38M #UNITED #UAL211 #UA211 #ADSB #ADSBbot