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

🇺🇸 N7857B - Boeing 737NG 79P/W - Southwest Airlines SWA4265/WN4265, Denver (DEN) to Myrtle Beach (MYR) - 6.0 mi away @ 39425 ft, heading ESE at 523 mph. Spotted 72x before! [04:10:28 PM CDT] #AAA668 #N7857B #B737 #SOUTHWEST #SWA4265 #WN4265 #ADSB #ADSBbot