Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Benidorm (49% of total searches to Costa Blanca). The next most popular destinations are Alicante (43%) and Torrevieja (5%). Searches for hotels in Calp (4%) are also popular.
KAYAK users have found double rooms in Costa Blanca for as cheap as $16 (Alicante) in the last 3 days. The average price is $168.