Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is San Sebastian (36% of total searches to Bay of Biscay). The next most popular destinations are Bilbao (28%) and Santander (24%). Searches for hotels in Biarritz (12%) are also popular.
KAYAK users have found double rooms in Bay of Biscay for as cheap as £15 (Capbreton) in the last 3 days. The average price is £150.