Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Santander (82% of total searches to Cantabria Coast). The next most popular destinations are Somo (10%) and Laredo (5%). Searches for hotels in Santillana del Mar (3%) are also popular.
KAYAK users have found double rooms in Cantabria Coast for as cheap as $20 (Castro-Urdiales) in the last 3 days. The average price is $149.