The United Boeing 767-300ER is a mid-to-large-size, mid-to-long-range, wide-body twin-engine jet airliner with a cruise speed of 540mph and a wingspan of 156 feet and 1 inch. This plane offers several inflight amenities such as music, video, power, internet and food. The 777-300 v3 has 30 seats in its United Polaris business class, 46 seats in its United Economy Plus and 138 seats in United Economy.