Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Bangkok (41% of total searches to Southeast Asia). The next most popular destinations are Singapore (26%) and Pattaya (17%). Searches for hotels in Phuket City (16%) are also popular.
KAYAK users have found double rooms in Southeast Asia for as cheap as €6 (Ho Chi Minh City) in the last 3 days. The average price is €100.