The average bus between Cardiff and Brentford takes 5h 14m and the fastest bus takes 3h 18m. The bus service runs several times per day from Cardiff to Brentford. 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 3 times a day between Cardiff and Brentford. The earliest departure is at 1:40 AM at night, and the last departure from Cardiff is at 11:40 PM which arrives into Brentford at 3:44 AM. All services require a transfer, and take on average 5h 14m. The schedules shown below are for the next available departures.

3h 28m • 1 change
Arrives next day

7h 52m • 1 change
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4h 4m • 1 change

3h 28m • 1 change
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7h 52m • 1 change
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4h 4m • 1 change

3h 28m • 1 change
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7h 52m • 1 change
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4h 4m • 1 change

3h 28m • 1 change
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7h 52m • 1 change
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4h 11m • 1 change

3h 45m • 1 change
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7h 54m • 1 change
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4h 11m • 1 change
Want to know about travelling from Cardiff to Brentford? 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 Brentford. However, there are services departing from Cardiff station and arriving at Brentford station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 5h 14m.
Cardiff to Brentford bus services, operated by National Express, depart from Sophia Gardens station.
Cardiff to Brentford bus services, operated by National Express, arrive at Heathrow Central Bus Station.
The distance between Cardiff and Brentford is 197.9 km. The road distance is 232 km.
National Express operates a bus from Sophia Gardens to Heathrow Central Bus Station hourly. Tickets cost £26–65 and the journey takes 2h 50m.