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

🇺🇸 N8698B - Boeing 737NG 8H4/W - Southwest Airlines SWA1791/WN1791, Pittsburgh (PIT) to Denver (DEN) - 4.1 mi away @ 36650 ft, heading WSW at 410 mph. Spotted 78x before. [05:57:56 AM CST] #ABF3B8 #N8698B #B738 #SOUTHWEST #SWA1791 #WN1791 #ADSB #ADSBbot