The average train between Buc and Trappes takes 36 min and the fastest train takes 28 min. The train runs at least 2 times per hour from Buc to Trappes. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 30 minutes between Buc and Trappes. The earliest departure is at 6:00 AM in the morning, and the last departure from Buc is at 10:30 PM which arrives into Trappes at 11:15 PM. All services require a transfer, and take on average 36 min. The schedules shown below are for the next available departures.

35 min • 1 change

35 min • 1 change

30 min • 1 change

35 min • 1 change
Want to know about travelling from Buc to Trappes? 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 train from Buc to Trappes. However, there are services departing from Buc station and arriving at Trappes station via Versailles Chantiers. The journey, including transfers, takes approximately 36 min.
Buc to Trappes train services, operated by Transilien – SNCF Voyageurs, depart from Petit Jouy Les Loges station.
Buc to Trappes train services, operated by Transilien – SNCF Voyageurs, arrive at Trappes station.
The distance between Buc and Trappes is 7.9 km. The road distance is 14 km.
You can take a train from Petit Jouy Les Loges to Trappes via Versailles Chantiers in around 26 min.