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

🇺🇸 N8584Z - Boeing 737NG 800/W - Southwest Airlines SWA1473/WN1473 (STL-DAL-DEN) - 3.3 mi away @ 9025 ft, heading SW at 317 mph. Spotted 104x before. [04:48:09 PM CDT] #ABC80C #N8584Z #B738 #SOUTHWEST #SWA1473 #WN1473 #TakingOff #ADSB #ADSBbot