Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Teresina (92% of total searches to Piauí). The next most popular destinations are Cajueiro da Praia (4%) and Parnaíba (3%). Searches for hotels in São Raimundo Nonato (1%) are also popular.
KAYAK users have found double rooms in Piauí for as cheap as $29 (Picos) in the last 3 days. The average price is $70.