Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Argostoli (42% of total searches to Ionian Islands). The next most popular destinations are Corfu (25%) and Zakynthos (21%). Searches for hotels in Palaiokastritsa (13%) are also popular.
KAYAK users have found double rooms in Ionian Islands for as cheap as $36 (Sidari) in the last 3 days. The average price is $317.