Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Cascais (84% of total searches to Costa do Estoril). The next most popular destinations are Carcavelos (7%) and Parede (7%). Searches for hotels in Oeiras (2%) are also popular.
KAYAK users have found double rooms in Costa do Estoril for as cheap as $49 (Cascais) in the last 3 days. The average price is $253.