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

🇺🇸 N8319F - Boeing 737NG 8H4/W - Southwest Airlines SWA2147/WN2147 (DCA-MDW-ABQ) - 4.8 mi away @ 40150 ft, heading WSW at 512 mph. Spotted 73x before! [11:06:55 PM CDT] #AB5FAA #N8319F #B738 #SOUTHWEST #SWA2147 #WN2147 #ADSB #ADSBbot