The average bus between Windsor and Cardiff takes 4h 46m and the fastest bus takes 4h 3m. There is a bus service every few hours from Windsor to Cardiff. 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 Windsor and Cardiff. The earliest departure is at 5:46 AM in the morning, and the last departure from Windsor is at 10:45 PM which arrives into Cardiff at 4:00 AM. All services require a transfer, and take on average 4h 46m. The schedules shown below are for the next available departures.

4h 5m • 1 change

5h • 1 change

4h 16m • 1 change

5h 6m • 1 change

5h 14m • 1 change

4h 52m • 1 change

4h 42m • 1 change

4h 47m • 1 change

5h 14m • 1 change

4h 52m • 1 change

4h 42m • 1 change

4h 47m • 1 change

5h 14m • 1 change

4h 52m • 1 change

4h 42m • 1 change

4h 47m • 1 change
Want to know about travelling from Windsor to Cardiff? 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 Windsor to Cardiff. However, there are services departing from Windsor station and arriving at Cardiff station via Sophia Gardens. The journey, including transfers, takes approximately 4h 46m.
Windsor to Cardiff bus services, operated by Thames Valley Buses, depart from Heathrow Terminal 5 station.
Windsor to Cardiff bus services, operated by Thames Valley Buses, arrive at Sophia Gardens station.
Book your Windsor to Cardiff bus tickets online with Thames Valley Buses and National Express.
The distance between Windsor and Cardiff is 178.7 km. The road distance is 245 km.
National Express operates a bus from Heathrow Terminal 5 to Sophia Gardens hourly. Tickets cost £26–65 and the journey takes 3h 20m.