On 25 July 1957, the airline introduced its flight simulator for the Douglas DC-7C – the last KLM aircraft with piston engines – which opened the transpolar route from Amsterdam via Anchorage to Tokyo on 1 November 1958.
O 25 de xullo de 1957 a aeroliña introduciu o seu simulador de voo para o Douglas DC-7C, o derradeiro avión con motores de pistón de KLM, que abriu a ruta traspolar dende Ámsterdam a Toquio vía Anchorage o 1 de novembro de 1958.