🇺🇸 N660UA - Boeing 767 322ER/W - United Airlines UAL21/UA21, Amsterdam Schiphol (AMS) to George Bush Intcntl/Houston (IAH) - 10.1 mi away @ 37750 ft, heading SSW at 534 mph. Spotted 13x before. [01:21:40 PM CDT] #A8B5FC #N660UA #B763 #UNITED #UAL21 #UA21 #ADSB #ADSBbot