Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Foz do Iguaçu (52% of total searches to Paraná). The next most popular destinations are Curitiba (43%) and Guaratuba (4%).
KAYAK users have found double rooms in Paraná for as cheap as €14 (Foz do Iguaçu) in the last 3 days. The average price is €80.