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

🇺🇸 N76288 - Boeing 737NG 824/W - United Airlines UAL2181/UA2181 (PHX-IAH-LGA) - 4.8 mi away @ 38850 ft, heading NE at 581 mph. Spotted 14x before! [02:41:07 PM CDT] #AA4C87 #N76288 #B738 #UNITED #UAL2181 #UA2181 #ADSB #ADSBbot