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

🇺🇸 N26910 - Boeing 787 8 - United Airlines UAL1116/UA1116 (IAD-SFO-AUS) - 4.0 mi away @ 34525 ft, heading W at 492 mph. Spotted once before! [10:20:07 AM CST] #A2A300 #N26910 #B788 #UNITED #UAL1116 #UA1116 #autopilot #ADSB #ADSBbot