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

🇺🇸 N8647A - Boeing 737NG 8H4/W - Southwest Airlines SWA153/WN153, Harry Reid (LAS) to Baltimore/Washington Thurgood Marshall (BWI) - 4.4 mi away @ 36950 ft, heading E at 549 mph. Spotted 86x before. [11:03:20 AM CST] #ABE101 #N8647A #B738 #SOUTHWEST #SWA153 #WN153 #ADSB #ADSBbot