The average bus between Guyancourt and Orsay takes 58 min and the fastest bus takes 45 min. There is a bus service every few hours from Guyancourt to Orsay. 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 Guyancourt and Orsay. The earliest departure is at 5:36 AM in the morning, and the last departure from Guyancourt is at 10:09 PM which arrives into Orsay at 11:15 PM. All services require a transfer, and take on average 58 min. The schedules shown below are for the next available departures.

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57 min • 1 changeWant to know about travelling from Guyancourt to Orsay? 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 Guyancourt to Orsay. However, there are services departing from Le Corbusier station and arriving at Mairie - Hôpital - Orsay RER station via Université Paris-Saclay station. The journey, including transfers, takes approximately 58 min.
Guyancourt to Orsay bus services, operated by Lignes Île-de-France Ouest, depart from Le Corbusier station.
Guyancourt to Orsay bus services, operated by Paris-Saclay Mobilités, arrive at Mairie - Hôpital - Orsay RER station.
The distance between Guyancourt and Orsay is 12 km. The road distance is 17 km.
You can take a bus from Le Corbusier to Mairie - Hôpital - Orsay RER via Université Paris-Saclay in around 52 min.