Singapore Changi Airport (IATA: SIN, ICAO: WSSS), Changi International Airport, or simply Changi Airport, is the main airport
in Singapore. A major aviation hub in Southeast Asia, it is about 17 km (11 mi) north-east from the commercial centre in Changi.
Singapore Airport is the home base of Singapore Airlines, Singapore Airlines Cargo, SilkAir, Scoot, Tiger Airways, Jetstar Asia Airways
Valuair, and Jett8 Airlines. As of March 2012, Changi Airport serves more than 100 airlines operating 6,100 weekly flights connecting Singapore
to over 220 cities in about 60 countries and territories worldwide. Until 30 March 2013, the airport served as a secondary hub for Qantas,
which used Singapore as the main stopover point for flights on the Kangaroo Route between Australia and Europe. Qantas is the largest foreign
airline to operate from the airport, with over two million passengers annually. An important contributor to the economy of Singapore, more
than 28,000 people are employed at the airport, which accounts for over S$4.5 billion in output.
Changi Airport has three passenger terminals with a total annual handling capacity of 66 million passengers. Terminal 1 opened in 1981, followed
by Terminal 2 in 1990 and Terminal 3 in 2008. The Budget Terminal, opened on 26 March 2006 and closed on 25 September 2012, will make way for
Terminal 4 which will be ready by 2017.