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

🇺🇸 N7743B - Boeing 737NG 7BD/W - Southwest Airlines SWA548/WN548 (DAL-STL-DCA) - 3.3 mi away @ 8025 ft, heading E at 322 mph. Spotted 66x before. [12:06:08 PM CDT] #AA7AA6 #N7743B #B737 #SOUTHWEST #SWA548 #WN548 #Landing #ADSB #ADSBbot