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

🇺🇸 N77431 - Boeing 737NG 924ER/W - United Airlines UAL622C/UA622C (PHL-ORD-AUS) - 3.7 mi away @ 29850 ft, heading SW at 469 mph. Spotted 15x before! [01:56:57 PM CST] #AA7ABE #N77431 #B739 #UNITED #UAL622C #UA622C #ADSB #ADSBbot