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

🇺🇸 N2644U - Boeing 777 300ER - United Airlines UAL1777/UA1777, Newark Liberty (EWR) to San Francisco (SFO) - 5.3 mi away @ 38150 ft, heading W at 557 mph. Spotted for first time! [12:12:57 PM CDT] #A290D0 #N2644U #B77W #UNITED #UAL1777 #UA1777 #ADSB #ADSBbot

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

🇺🇸 N2352U - Boeing 777 300ER - United Airlines UAL1777/UA1777, Newark Liberty (EWR) to San Francisco (SFO) - 4.7 mi away @ 38125 ft, heading W at 571 mph. Spotted for first time! [09:27:30 AM CDT] #A21DC4 #N2352U #B77W #UNITED #UAL1777 #UA1777 #ADSB #ADSBbot