Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N255WN - Boeing 737NG 7H4/W - Southwest Airlines SWA4018/WN4018, Denver (DEN) to Baltimore/Washington Thurgood Marshall (BWI) - 4.6 mi away @ 38575 ft, heading E at 596 mph. Spotted 63x before. [08:10:31 PM CST] #A26C12 #N255WN #B737 #SOUTHWEST #SWA4018 #WN4018 #ADSB #ADSBbot