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

🇳🇱 PH-BHD - Boeing 787 9 - KLM Royal Dutch Airlines KLM686/KL686, Licenciado Benito Juarez (MEX) to Amsterdam Schiphol (AMS) - 4.5 mi away @ 38175 ft, heading NNE at 609 mph. Spotted 3x before. [12:43:56 AM CST] #4851AF #PH_BHD #B789 #KLM #KLM686 #KL686 #autopilot #ADSB #ADSBbot