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

🇬🇧 G-STBI - Boeing 777 336ER - British Airways BAW97A/BA97A, London Heathrow (LHR) to George Bush Intcntl/Houston (IAH) - 4.7 mi away @ 38325 ft, heading SSW at 558 mph. Spotted 3x before! [05:33:04 PM CDT] #406A34 #G_STBI #B77W #SPEEDBIRD #BAW97A #BA97A #ADSB #ADSBbot