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

🇺🇸 N61881 - Boeing 737NG 924ER/W - United Airlines UAL651/UA651, Fort Lauderdale/Hollywood (FLL) to Chicago O'Hare (ORD) - 3.2 mi away @ 29075 ft, heading NNE at 630 mph. Spotted 24x before. [07:17:39 PM CST] #A81000 #N61881 #B739 #UNITED #UAL651 #UA651 #ADSB #ADSBbot