🇺🇸 N787UA - Boeing 777 222ER - United Airlines UAL879/UA879, London Heathrow (LHR) to George Bush Intcntl/Houston (IAH) - 5.2 mi away @ 37600 ft, heading SSW at 566 mph. Spotted 4x before. [12:30:35 PM CDT] #AAAC4A #N787UA #B772 #UNITED #UAL879 #UA879 #ADSB #ADSBbot