Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Manteigas (75% of total searches to Serra da Estrela). The next most popular destinations are Covilhã (13%) and Alentejo (10%). Searches for hotels in Seia (3%) are also popular.
KAYAK users have found double rooms in Serra da Estrela for as cheap as C$ 56 (Seia) in the last 3 days. The average price is C$ 454.