Qantas Airways Limited ( ) is the flag carrier of Australia and the country's largest airline by fleet size, international flights, and international destinations. It is the second oldest airline still in operation, having been founded in November 1920; it began international passenger flights in May 1935. Qantas is an acronym of the airline's original name, Queensland and Northern Territory Aerial Services, as it originally served Queensland and the Northern Territory, and is popularly nicknamed "The Flying Kangaroo". Qantas is a founding member of the Oneworld airline alliance. The airline is based in the Sydney suburb of Mascot, adjacent to its main hub at Sydney Airport. , Qantas had a 65 per cent share of the Australian domestic market and carried 14.9 per cent of all passengers travelling into and out of Australia. Various subsidiary airlines operate to regional centres and on some trunk routes within Australia under the QantasLink banner. Qantas also owns Jetstar, a low-cost airline that operates both international services from Australia and domestic services within Australia and New Zealand; and holds stakes in a number of other Jetstar-branded airlines. History Qantas was founded in Winton, Queensland on 16 November 1920 by Hudson Fysh, Paul McGinness and Fergus McMaster as Queensland and Northern Territory Aerial Services Limited. The airline's first aircraft was an Avro 504K. It moved its headquarters to Longreach, Queensland in 1921 and Brisbane, Queensland in 1930. QEA era In 1934, QANTAS and Britain's Imperial Airways (a forerunner of British Airways) formed a new company, Qantas Empire Airways Limited (QEA). The new airline commenced operations in December 1934, flying between Brisbane and Darwin. QEA flew internationally from May 1935, when the service from Darwin was extended to Singapore (Imperial Airways operated the rest of the service through to London). When World War II began, enemy action and accidents destroyed half of the fleet of ten, and most of the fleet was taken over by the Australian government for war service. Flying boat services were resumed in 1943, with flights between the Swan River at Crawley in Perth, Western Australia and Koggala Lake in Ceylon (now Sri Lanka). This linked up with the British Overseas Airways Corporation (BOAC, the successor airline to Imperial Airways) service to London. Qantas' kangaroo logo was first used on the "Kangaroo Route", begun in 1944, from Sydney to Karachi, where BOAC crews took over for the rest of the journey to