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

🇺🇸 N57857 - Boeing 757 324/W - United Airlines UAL667/UA667, Washington Dulles (IAD) to Los Angeles (LAX) - 3.7 mi away @ 32125 ft, heading W at 463 mph. Spotted 2x before! [09:45:56 AM CST] #A76F48 #N57857 #B753 #UNITED #UAL667 #UA667 #ADSB #ADSBbot