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

🇺🇸 N279WN - Boeing 737NG 7H4/W - Southwest Airlines SWA1776/WN1776 (DAL-MDW-CMH-BWI) - 4.5 mi away @ 36500 ft, heading NE at 549 mph. Spotted 78x before! [03:46:57 PM CST] #A2C9EC #N279WN #B737 #SOUTHWEST #SWA1776 #WN1776 #ADSB #ADSBbot