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

🇺🇸 N8745K - Boeing 737MAX 8 - Southwest Airlines SWA1503/WN1503, St Louis Lambert (STL) to Phoenix Sky Harbor (PHX) - 3.2 mi away @ 8050 ft, heading SW at 329 mph. Spotted 57x before. [09:52:43 PM CDT] #AC0843 #N8745K #B38M #SOUTHWEST #SWA1503 #WN1503 #TakingOff #Departure #ADSB #ADSBbot