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

🇺🇸 N8648A - Boeing 737NG 8H4/W - Southwest Airlines SWA4425/WN4425, Baltimore/Washington Thurgood Marshall (BWI) to Denver (DEN) - 4.5 mi away @ 37775 ft, heading W at 511 mph. Spotted 99x before! [10:33:37 PM CDT] #ABE124 #N8648A #B738 #SOUTHWEST #SWA4425 #WN4425 #ADSB #ADSBbot