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

🇺🇸 N66848 - Boeing 737NG 924ER/W - United Airlines UAL1913/UA1913 (ORD-IAH-LAS) - 4.8 mi away @ 34900 ft, heading SW at 453 mph. Spotted 10x before! [08:36:57 AM CDT] #A8D4F6 #N66848 #B739 #UNITED #UAL1913 #UA1913 #ADSB #ADSBbot