Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Porto (97% of total searches to Douro Litoral). The next most popular destinations are Vila Nova de Gaia (2%) and Guimarães (1%). Searches for hotels in Viseu (0%) are also popular.
KAYAK users have found double rooms in Douro Litoral for as cheap as $26 (Guimarães) in the last 3 days. The average price is $272.