The average bus between Poissy and Guyancourt takes 59 min and the fastest bus takes 42 min. There is a bus service every few hours from Poissy to Guyancourt. 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 Poissy and Guyancourt. The earliest departure is at 5:30 AM in the morning, and the last departure from Poissy is at 9:45 PM which arrives into Guyancourt at 10:31 PM. All services require a transfer at Saint-Quentin - Gare routière Paul Delouvrier and take an average of 59 min. The schedules shown below are for the next available departures.

1h 13m • 1 change

1h • 1 change

55 min • 1 change

1h 3m • 1 change

42 min • 1 change

55 min • 1 change

49 min • 1 change

51 min • 1 change

1h 13m • 1 change

50 min • 1 change

55 min • 1 change

52 min • 1 change
Want to know about travelling from Poissy to Guyancourt? 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 Poissy to Guyancourt. However, there are services departing from Poissy station and arriving at Guyancourt station via Saint-Quentin - Gare routière Paul Delouvrier. The journey, including transfers, takes approximately 59 min.
Poissy to Guyancourt bus services, operated by Lignes Île-de-France Ouest, depart from Gare Routière Nord station.
Poissy to Guyancourt bus services, operated by Lignes Île-de-France Ouest, arrive at Le Château station.
The distance between Poissy and Guyancourt is 17.4 km. The road distance is 30 km.
You can take a bus from Gare Routière Nord to Le Château via Saint-Quentin - Gare routière Paul Delouvrier and Saint-Quentin - Gare Routière des Prés in around 47 min.