How can I get from the Paris Charles de Gaulle airport to the Montparnasse train station?

Question

From Charles de Gaulle to the Gare de Montparnasse quickly?

Answer 1

Take RER B to Denfert Rocheau and from there change to line 6 direction charles de gaulle and stop at montparnasse bienvenue.

Answer 2

Or you could take the bus. It's much easier and takes just as long as the RER. There are Air France buses going directly from Charles de Gaulle to Montparnasse. They cost 12 euroes and are really good. Catch them from right outside the airport. You'll see the signs

Answer 3

Take the RER B (commuter rail line) from the Station in CDG airport marked "Direction : Saint-Remy-les-Chevreuse" to the Chatelet-Les Halles stop.

Change to Metro Line 4 marked "Direction : Porte d'Orleans (General Leclerc)" which will take you to the to the Montparnasse-Bienvenue stop. The metro stop is a short walk to the SNCF Train station.

The trip, including transfers, should take under an hour.