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

🇺🇸 N47570 - Boeing 737MAX 9 - United Airlines UAL1958/UA1958, Washington Dulles (IAD) to Los Angeles (LAX) - 4.2 mi away @ 35700 ft, heading W at 514 mph. Spotted 10x before! [07:36:19 AM CDT] #A5D713 #N47570 #B39M #UNITED #UAL1958 #UA1958 #ADSB #ADSBbot