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

🇺🇸 N68842 - Boeing 737NG 924ER/W - United Airlines UAL1536/UA1536, Denver (DEN) to Washington Dulles (IAD) - 17.5 mi away @ 35100 ft, heading E at 562 mph. Spotted 6x before! [10:48:18 AM CDT] #A923EE #N68842 #B739 #UNITED #UAL1536 #UA1536 #ADSB #ADSBbot