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

🇺🇸 N73278 - Boeing 737NG 824/W - United Airlines UAL241/UA241 (IND-IAH-DEN) - 3.8 mi away @ 32750 ft, heading WSW at 434 mph. Spotted once before! [11:58:21 AM CDT] #A9D5E7 #N73278 #B738 #UNITED #UAL241 #UA241 #ADSB #ADSBbot