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

🇺🇸 N29977 - Boeing 787 9 - United Airlines UAL2679/UA2679 (EWR-LAX-DEN) - 4.8 mi away @ 39450 ft, heading WSW at 526 mph. Spotted 3x before! [11:52:07 AM CDT] #A31A56 #N29977 #B789 #UNITED #UAL2679 #UA2679 #autopilot #ADSB #ADSBbot