Let KAYAK do the searching
Based on KAYAK hotel searches, the most popular destination is Chamonix (89% of total searches to Mont Blanc). The next most popular destinations are Courmayeur (6%) and Les Houches (5%). Searches for hotels in Saint-Gervais-les-Bains (1%) are also popular.
KAYAK users have found double rooms in Mont Blanc for as cheap as $154 (Courmayeur) in the last 3 days. The average price is $391.