The Boeing 818 is a space passenger plane designed by aeronautics company Boeing. The 818 is the second in line of the 800 series of Boeing passenger liners, which started with the Boeing 808, a short range space passenger plane variant of the final Boeing 700 series air planes, the Boeing 797. The 818 features long term flight capability designed for passenger space travel between the Earth and Mars, and space stations and orbital hotels within similar range. 818 liners are widely used in civilian space flights between space stations within the Earth-Mars region. The Boeing 818 replaces many of the Union of Everett government aerial transportation such as Air Force One. Boeing 818's are used and docked within space vessels such as Presidential-class Command Vessels as a executive transpor