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

🇺🇸 N8576Z - Boeing 737NG 800/W - Southwest Airlines SWA4302/WN4302, Harry Reid (LAS) to Pittsburgh (PIT) - 4.8 mi away @ 38050 ft, heading ENE at 611 mph. Spotted 87x before. [08:31:26 PM CST] #ABC49B #N8576Z #B738 #SOUTHWEST #SWA4302 #WN4302 #ADSB #ADSBbot