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

🇺🇸 N8560Z - Boeing 737NG 800/W - Southwest Airlines SWA3356/WN3356 (STL-LAS-RNO) - 3.9 mi away @ 14400 ft, heading WNW at 440 mph. Spotted 88x before! [12:39:27 PM CDT] #ABC012 #N8560Z #B738 #SOUTHWEST #SWA3356 #WN3356 #TakingOff #ADSB #ADSBbot