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

🇺🇸 N17566 - Boeing 737MAX 9 - United Airlines UAL1891/UA1891, George Bush Intcntl/Houston (IAH) to Newark Liberty (EWR) - 3.9 mi away @ 34625 ft, heading NE at 656 mph. Spotted 3x before! [04:39:04 PM CST] #A12F09 #N17566 #B39M #UNITED #UAL1891 #UA1891 #ADSB #ADSBbot