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

🇺🇸 N8973S - Southwest Airlines SWA4296/WN4296, St Louis Lambert (STL) to Los Angeles (LAX) - 3.4 mi away @ 7850 ft, heading SW at 313 mph. Spotted 6x before! [03:55:03 PM CST] #AC6227 #N8973S #SOUTHWEST #SWA4296 #WN4296 #TakingOff #Departure #ADSB #ADSBbot