Airlines always provide packaged tour with the strategic alliance of the hotel/travel agency to get more passengers and larger benefits on the international tourism lines. The study is aimed to explore the preferences of trave4ling passengers under the different circumstances of the alliances of airliner, hotel and travel agency. By using of stated preference method, we selected airliner, including two Taiwanese airlines; three levels of hotel/resort, and different types of travel agencies as the attributes (levels). We collect the data from the passengers who traveled from Taiwan to Bali, one of the most famous tourism islands in South-East Asia. The results of the study indicate that airlines packaged tour of strategic alliance can correctly improve the travelers' preference and increase airline's passenger. From the utility of social-economic attribute, like as age, sex and income, we can suggest airlines provide different marketing strategy to the consumers.