Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Vigan City (67% of total searches to Ilocos Sur). The next most popular destinations are Santiago (31%) and Quirino (2%). Searches for hotels in Candon (1%) are also popular.
KAYAK users have found double rooms in Ilocos Sur for as cheap as $13 (Bantay) in the last 3 days. The average price is $38.