Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Bilbao (44% of total searches to Bay of Biscay). The next most popular destinations are La Rochelle (30%) and San Sebastian (19%). Searches for hotels in Biarritz (7%) are also popular.
KAYAK users have found double rooms in Bay of Biscay for as cheap as $33 (Gijón) in the last 3 days. The average price is $334.