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

🇺🇸 N67815 - Boeing 737NG 924ER/W - United Airlines UAL1477/UA1477 (ORD-PHX-IAH-SAT) - 4.3 mi away @ 35950 ft, heading SW at 542 mph. Spotted 14x before! [08:39:56 AM CDT] #A8FC09 #N67815 #B739 #UNITED #UAL1477 #UA1477 #ADSB #ADSBbot