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

🇺🇸 N69829 - Boeing 737NG 924ER/W - United Airlines UAL8257/UA8257 (ORD-IAD-SAN) - 4.2 mi away @ 33700 ft, heading W at 448 mph. Spotted 10x before! [01:54:34 PM CST] #A94B2E #N69829 #B739 #UNITED #UAL8257 #UA8257 #ADSB #ADSBbot