The airport began as a Royal Air Force airfield in 1944 during the Second World War, RAF Negombo with No. 45 Squadron RAF (1946–49), No. 232 Squadron RAF (1945), No. 249 Squadron RAF (1950) and No. 1303 Flight RAF (1945–46). In 1957, Prime Minister S. W. R. D. Bandaranaike removed all the British Military airfields from Ceylon (Sri Lanka), and the airfield was handed over to the Royal Ceylon Air Force (RCAF) and renamed Katunayake; part of it still remains a military airfield. In 1964 Anil Moonesinghe, the Minister of Communications, started the building of a new international airport to replace Ratmalana, with Canadian aid. The airport was completed in 1967, and Air Ceylon, the national carrier, began international operations from it using a Hawker Siddeley Trident and a Vickers VC-10 leased from British Overseas Airways Corporation (BOAC). It was named after former Prime Minister SWRD Bandaranaike, in 1970. It was renamed Katunayake International Airport in 1977, but reverted to Bandaranaike International Airport in 1995. On 7 November 1971, the first Boeing 747 landed at the airport. The Boeing 747-200B was operated by Condor carrying German tourists from Frankfurt. In the early 1990s the position of the airport's runway (04/22) was shifted northward and the old runway was made into a taxiway for departing and arriving aircraft. Airport expansion projects have recently been undertaken at the airport under the Stage 1, Phase II Expansion Project. A pier with eight aero-bridges opened in November 2005. A new terminal with an additional eight gates are proposed to be built under Stage II of the Phase II Expansion Project. Construction of the new Stage II, Phase II Expansion Project is expected to commence in June 2026, after a delay of almost nine years, due to COVID-19 and the subsequent economic crises that followed. On 7 May 2007, the Sri Lankan Government shifted military aviation operations out of the space adjoining the airport to SLAF Hingurakgoda, thus paving the way for the expansion of civilian operations. As part of the airport development program, a passenger-train service was launched between the Airport and Colombo Secretariat Station, in June 2010. The airport is used by Emirates as an alternative emergency airport for its Airbus A380 aircraft. On 9 January 2012, an Airbus A380-800 operated by Emirates landed at Bandaranaike International Airport. This was the first time an Airbus A380 had landed in a Sri Lankan airport. SriLankan Airlines is the largest airline operating at the airport, with a fleet of 27 Airbus aircraft.