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Tags: Asia, Singapore, Southeast Asia In 2009, the Economist Intelligence Unit ranked Singapore the tenth most expensive city in the world in which to liveāthe third in Asia, after Tokyo and Osaka. Singapore Changi Airport is about 17.2 kilometres (10.7 mi) north-east from the commercial centre, connected to the Mass Rapid Transit (MRT) network, with Changi Airport Station located underground between Terminal 2 and Terminal 3.