Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Paris (94% of total searches to Ile-de-France). The next most popular destinations are Chessy (4%) and Magny-le-Hongre (2%). Searches for hotels in Serris (1%) are also popular.
KAYAK users have found double rooms in Ile-de-France for as cheap as £18 (Paris) in the last 3 days. The average price is £178.