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

🇺🇸 N8708Q - Boeing 737MAX 8 - Southwest Airlines SWA4044/WN4044, Phoenix Sky Harbor (PHX) to Washington Dulles (IAD) - 5.1 mi away @ 40600 ft, heading E at 603 mph. Spotted 46x before! [02:33:26 PM CDT] #ABF9D5 #N8708Q #B38M #SOUTHWEST #SWA4044 #WN4044 #ADSB #ADSBbot