The average bus between Cardiff and Windsor Castle takes 4h 42m and the fastest bus takes 3h 49m. There is a bus service every few hours from Cardiff to Windsor Castle. 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 Cardiff and Windsor Castle. The earliest departure is at 1:40 AM at night, and the last departure from Cardiff is at 11:40 PM which arrives into Windsor Castle at 4:37 AM. All services require a transfer at Heathrow Terminal 5 and take an average of 4h 42m. The schedules shown below are for the next available departures.

3h 59m • 1 change

4h 48m • 1 change

4h 29m • 1 change

5h 10m • 1 change

3h 49m • 1 change

4h 33m • 1 change

4h 10m • 1 change

4h 50m • 1 change

3h 49m • 1 change

4h 34m • 1 change

4h 9m • 1 change

4h 52m • 1 change

3h 59m • 1 change

4h 48m • 1 change

4h 29m • 1 change

5h 10m • 1 change
Want to know about travelling from Cardiff to Windsor Castle? 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 Cardiff to Windsor Castle. However, there are services departing from Cardiff station and arriving at Windsor Castle station via Heathrow Terminal 5. The journey, including transfers, takes approximately 4h 42m.
Cardiff to Windsor Castle bus services, operated by National Express, depart from Sophia Gardens station.
Cardiff to Windsor Castle bus services, operated by National Express, arrive at Parish Church station.
The distance between Cardiff and Windsor Castle is 178.3 km. The road distance is 241 km.
You can take a bus from Sophia Gardens to Windsor Castle via Heathrow Terminal 5 and Parish Church in around 4h 20m.