The average bus between Les Ulis and Buc takes 1h 47m and the fastest bus takes 1h 6m. There is a bus service every few hours from Les Ulis to Buc. 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 hourly between Les Ulis and Buc. The earliest departure is at 6:08 AM in the morning, and the last departure from Les Ulis is at 10:28 PM which arrives into Buc at 6:41 AM. All services require a transfer, and take on average 1h 47m. The schedules shown below are for the next available departures.

1h 8m • 1 change

1h 6m • 1 change
Arrives next day

8h 13m • 1 change

1h 22m • 1 change

1h 14m • 1 change

1h 21m • 1 change

1h 19m • 1 change

1h 22m • 1 change

1h 14m • 1 change

1h 21m • 1 change

1h 19m • 1 change
Want to know about travelling from Les Ulis to Buc? 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 Les Ulis to Buc. However, there are services departing from Les Ulis station and arriving at Buc station via Gare de Jouy-en-Josas. The journey, including transfers, takes approximately 1h 47m.
Les Ulis to Buc bus services, operated by Paris-Saclay Mobilités, depart from Mairie des Ulis - Place de la Liberté station.
Les Ulis to Buc bus services, operated by Paris-Saclay Mobilités, arrive at Collège M.L.-King / Lycée Franco-Allemand station.
The distance between Les Ulis and Buc is 10.7 km. The road distance is 37 km.
You can take a bus from Mairie des Ulis - Place de la Liberté to Collège M.L.-King / Lycée Franco-Allemand via Gare de Jouy-en-Josas in around 1h 29m.