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

🇺🇸 N8889Q - Boeing 737MAX 8 - Southwest Airlines SWA1781/WN1781, Baltimore/Washington Thurgood Marshall (BWI) to Phoenix Sky Harbor (PHX) - 3.9 mi away @ 31700 ft, heading W at 440 mph. Spotted 19x before! [05:19:42 PM CST] #AC3F2F #N8889Q #B38M #SOUTHWEST #SWA1781 #WN1781 #ADSB #ADSBbot