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

🇺🇸 N8308K - Boeing 737NG 8H4/W - Southwest Airlines SWA4659/WN4659 (CHS-BWI-DAL) - 4.2 mi away @ 34625 ft, heading SW at 421 mph. Spotted 76x before! [01:59:37 PM CST] #AB5BD4 #N8308K #B738 #SOUTHWEST #SWA4659 #WN4659 #ADSB #ADSBbot