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 (30%) and Candon (2%). Searches for hotels in Bantay (1%) are also popular.
KAYAK users have found double rooms in Ilocos Sur for as cheap as $42 (Bantay) in the last 3 days. The average price is $59.