2. Singapore Changi, Singapore
Since Skytrax began ranking airports in 1999, Singapore Changi has placed first twice. The airport was built in 1981, and it has since added more terminals that cater to both budget and luxury passengers. The up-to-date services and amenities include an indoor orchid garden, a rooftop swimming pool, themed television lounges and a free sight-seeing tour for those who have at least five hours prior to their connecting flight.