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

🇺🇸 N939WN - Boeing 737NG 7H4/W - Southwest Airlines SWA1060/WN1060, Los Angeles (LAX) to Baltimore/Washington Thurgood Marshall (BWI) - 4.3 mi away @ 39200 ft, heading ENE at 663 mph. Spotted 57x before! [11:15:56 AM CST] #AD0919 #N939WN #B737 #SOUTHWEST #SWA1060 #WN1060 #ADSB #ADSBbot