怎樣買東南亞幾國聯在一起的機票

Depends on你會stay幾耐同埋去幾多個國家
你可以考慮star alliance或one world既airpass
應該啱你用

Star Alliance Circle Asia Fare
http://www.staralliance.com/en/travellers/fare_products/circle_asia_fare.html

Star Alliance Asian Airpass
http://www.staralliance.com/en/travellers/fare_products/asian_airpass.html

另外，one world寰宇一家亦都有隻類似既airpass
Travel Round Asia and Australasia with oneworld Circle Fares
http://www.oneworld.com/ow/air-travel-options/multi-sector-intercontinental-fares/circle-asia-and-south-west-pacific

詳情你可以上返li兩間公司既website，或者去返旅行社問
建議你去返d大agent
或者去學聯問下
因為li類product未必間間旅行社都有做