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

🇺🇸 N8879Q - Boeing 737MAX 8 - Southwest Airlines SWA2259/WN2259, Baltimore/Washington Thurgood Marshall (BWI) to San Diego (SAN) - 4.9 mi away @ 39425 ft, heading W at 439 mph. Spotted 62x before! [09:55:03 PM CDT] #AC3B78 #N8879Q #B38M #SOUTHWEST #SWA2259 #WN2259 #ADSB #ADSBbot