United Airlines has 234 widebody aircraft. The all-Boeing equipment consists of 55 777-200ERs, 52 787-9s, 37 767-300ERs, 22 777-300ERs, 21 787-10s, 19 777-200s (non-Extended Range), 16 767-400ERs, and 12 787-8s. More than one in five of United’s mainline frames are twin-aisles (21%).