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

🇺🇸 N17122 - Boeing 757 224/W - United Airlines UAL2434/UA2434, Newark Liberty (EWR) to Los Angeles (LAX) - 4.4 mi away @ 37800 ft, heading WSW at 507 mph. Spotted once before! [07:21:52 AM CDT] #A11F9D #N17122 #B752 #UNITED #UAL2434 #UA2434 #ADSB #ADSBbot