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

🇺🇸 N77572 - Boeing 737MAX 9 - United Airlines UAL1168/UA1168 (SAT-IAH-EWR-MCI) - 3.8 mi away @ 30400 ft, heading NE at 572 mph. Spotted 2x before! [04:46:03 PM CDT] #AA7F02 #N77572 #B39M #UNITED #UAL1168 #UA1168 #ADSB #ADSBbot