Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is El Chaltén (45% of total searches to Patagonia). The next most popular destinations are Puerto Montt (25%) and San Carlos de Bariloche (15%). Searches for hotels in Pucón (15%) are also popular.
KAYAK users have found double rooms in Patagonia for as cheap as €15 (Ushuaia) in the last 3 days. The average price is €71.