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

🇺🇸 N76519 - Boeing 737NG 824/W - United Airlines UAL565/UA565, Toronto Pearson (YYZ) to San Francisco (SFO) - 18.8 mi away @ 35875 ft, heading WSW at 538 mph. Spotted 12x before! [08:40:53 AM CDT] #AA56B8 #N76519 #B738 #UNITED #UAL565 #UA565 #ADSB #ADSBbot