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

🇺🇸 N8904L - Boeing 737MAX 8 - Southwest Airlines SWA2093/WN2093, Baltimore/Washington Thurgood Marshall (BWI) to Ontario (ONT) - 4.2 mi away @ 35450 ft, heading WSW at 525 mph. Spotted 48x before! [04:47:40 PM CDT] #AC4843 #N8904L #B38M #SOUTHWEST #SWA2093 #WN2093 #ADSB #ADSBbot