The average bus between Gare Montparnasse and L'Isle-Adam takes 2h 14m and the fastest bus takes 1h 59m. The bus service runs several times per day from Gare Montparnasse to L'Isle-Adam. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run 4 times a day between Gare Montparnasse and L'Isle-Adam. The earliest departure is at 12:25 AM at night, and the last departure from Gare Montparnasse is at 3:40 AM which arrives into L'Isle-Adam at 5:44 AM. All services require a transfer at Gare de l'Est and take an average of 2h 14m. The schedules shown below are for the next available departures.

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Want to know about travelling from Gare Montparnasse to L'Isle-Adam? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Gare Montparnasse to L'Isle-Adam. However, there are services departing from Gare Montparnasse station and arriving at L'Isle-Adam station via Gare de l'Est. The journey, including transfers, takes approximately 2h 14m.
Gare Montparnasse to L'Isle-Adam bus services, operated by Régie Autonome des Transports Parisiens (RATP), depart from Gare Montparnasse station.
Gare Montparnasse to L'Isle-Adam bus services, operated by Régie Autonome des Transports Parisiens (RATP), arrive at La Poste station.
The distance between Gare Montparnasse and L'Isle-Adam is 31 km. The road distance is 49 km.
You can take a bus from Gare Montparnasse to La Poste via Gare de l'Est and Gare de l’Est – rue du 8 mai 1945 in around 2h 54m.