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

🇺🇸 N8564Z - Boeing 737NG 800/W - Southwest Airlines SWA1842/WN1842, Dallas Love Field (DAL) to Ronald Reagan Washington Ntl (DCA) - 14.2 mi away @ 38600 ft, heading ENE at 576 mph. Spotted 103x before! [03:54:24 PM CDT] #ABC09E #N8564Z #B738 #SOUTHWEST #SWA1842 #WN1842 #ADSB #ADSBbot