Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Manteigas (55% of total searches to Serra da Estrela). The next most popular destinations are Covilhã (26%) and Guarda (14%). Searches for hotels in Oliveira do Hospital (5%) are also popular.
KAYAK users have found double rooms in Serra da Estrela for as cheap as £17 (Guarda) in the last 3 days. The average price is £95.