Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Paris (98% of total searches to Ile-de-France). The next most popular destinations are Roissy-en-France (1%) and Chessy (0%). Searches for hotels in Tremblay-en-France (0%) are also popular.
KAYAK users have found double rooms in Ile-de-France for as cheap as $40 (Paris) in the last 3 days. The average price is $380.