Singapore Airlines is the main airline company of Singapore. The Singapore Airline group includes a number of airline-related subsidiaries including SIA Engineering Company, Singapore Airlines Cargo and SilkAir. The company is among the top 15 global airline carriers regarding revenue passenger kilometres. Singapore Airlines flies to 61 destinations in 35 countries, across six continents. Singapore Airlines was founded in 1947, and the group’s central hub is at Changi Airport, Singapore.