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

🇳🇱 PH-BQE - Boeing 777 206ER - KLM Royal Dutch Airlines KLM661/KL661, Amsterdam Schiphol (AMS) to George Bush Intcntl/Houston (IAH) - 4.1 mi away @ 32950 ft, heading SSW at 539 mph. Spotted for first time! [11:48:01 AM CDT] #48436C #PH_BQE #B772 #KLM #KLM661 #KL661 #ADSB #ADSBbot