A region is formed when different localities, cities, or countries are linked together, thus, regional development can be considered as an integration process. The regions are formed with the aim of better outcome. Ohmae (1995) defined this formation as a ‘region state’ or a borderless area developed with the aim of economic benefit. Therefore, the major reason of regional co-operation is to create a new geographic and economic alliance. Southeast Asian nations are also benefiting from this regionalisation not only from the economic viewpoint but also from the geographic aspects. Tourism provides opportunities for some of the Southeast Asian nations to transcend their geographic limitations (such as Singapore) as other contiguous countries are endowed with adequate resources to necessary to deem the local demand of leisure. Regional cooperation will also help reduce risky competition between destination areas and empower tourism development to reach to a greater height. Similarly, some of the Southeast Asian nations have comparative advantage in well-organized tourism infrastructure (for example, Singapore) and resources (for example, Malaysia) from which other countries can be benefited.