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

🇳🇱 PH-BQC - Boeing 777 206ER - KLM Royal Dutch Airlines KLM661/KL661, Amsterdam Schiphol (AMS) to George Bush Intcntl/Houston (IAH) - 5.1 mi away @ 39150 ft, heading SSW at 591 mph. Spotted once before. [01:01:42 PM CST] #48436A #PH_BQC #B772 #KLM #KLM661 #KL661 #ADSB #ADSBbot

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

🇳🇱 PH-BQC - Boeing 777 206ER - KLM Royal Dutch Airlines KLM661/KL661, Amsterdam Schiphol (AMS) to George Bush Intcntl/Houston (IAH) - 4.8 mi away @ 37175 ft, heading SSW at 573 mph. Spotted for first time! [11:36:27 AM CDT] #48436A #PH_BQC #B772 #KLM #KLM661 #KL661 #ADSB #ADSBbot