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

🇺🇸 N8301J - Boeing 737NG 8H4/W - Southwest Airlines SWA1543/WN1543, Raleigh-Durham (RDU) to Denver (DEN) - 4.9 mi away @ 40100 ft, heading W at 452 mph. Spotted 93x before. [06:23:02 AM CDT] #AB5ADE #N8301J #B738 #SOUTHWEST #SWA1543 #WN1543 #ADSB #ADSBbot