The average bus between Guyancourt and Poissy takes 1h and the fastest bus takes 41 min. There is an hourly bus service from Guyancourt to Poissy. 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 Poissy. The earliest departure is at 12:44 AM at night, and the last departure from Guyancourt is at 8:54 PM which arrives into Poissy at 10:05 PM. All services require a transfer at Saint-Quentin - Gare Routière des Prés and take an average of 1h. The schedules shown below are for the next available departures.

48 min • 1 change
55 min • 1 change
47 min • 1 change
48 min • 1 change
4h 8m • 1 change
41 min • 1 change
45 min • 1 change
43 min • 1 change
3h 58m • 1 change
41 min • 1 change
45 min • 1 change
43 min • 1 changeWant to know about travelling from Guyancourt to Poissy? 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 Poissy. However, there are services departing from Guyancourt station and arriving at Poissy station via Saint-Quentin - Gare Routière des Prés. The journey, including transfers, takes approximately 1h.
Guyancourt to Poissy bus services, operated by Saint-Quentin-en-Yvelines, depart from Le Château station.
Guyancourt to Poissy bus services, operated by Saint-Quentin-en-Yvelines, arrive at Gare Routière Nord station.
The distance between Guyancourt and Poissy is 17.4 km. The road distance is 30 km.
You can take a bus from Le Château to Gare Routière Nord via Saint-Quentin - Gare Routière des Prés and Saint-Quentin - Gare routière Paul Delouvrier in around 1h 5m.