Ratmalana airport at one time had the country's main terminal, with the Douglas DC-3 Dakota and Lockheed Constellation aeroplanes of Air Ceylon flying out of it. In 1947, KLM flew Douglas DC-4 Skymasters through the airport on the route from the Netherlands to the Dutch East Indies (Indonesia). In the 1950s, BOAC flew Canadair Argonauts (DC4 with Rolls Royce Merlin engines) from Ratmalana to London. On 11 August 1952, 3 months after the inaugural service of a passenger jet aircraft, BOAC began its Comet service between Colombo and London. Later (March 1962 - March 1971) Air Ceylon operated a Comet service on this route to London.