The average bus between Cardiff and Harrow on the Hill takes 5h 29m and the fastest bus takes 3h 50m. The bus service runs several times per day from Cardiff to Harrow on the Hill. 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 Harrow on the Hill. The earliest departure is at 1:40 AM at night, and the last departure from Cardiff is at 11:40 PM which arrives into Harrow on the Hill at 4:08 AM. All services require a transfer, and take on average 5h 29m. The schedules shown below are for the next available departures.

3h 50m • 1 change
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8h • 1 change
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4h 28m • 1 change

3h 50m • 1 change
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8h • 1 change
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4h 28m • 1 change

4h • 1 change
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8h 10m • 1 change
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4h 28m • 1 change

4h • 1 change
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8h 10m • 1 change
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4h 28m • 1 change

4h • 1 change
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8h 10m • 1 change
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4h 28m • 1 change
Want to know about travelling from Cardiff to Harrow on the Hill? 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 Harrow on the Hill. However, there are services departing from Cardiff station and arriving at Harrow on the Hill station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 5h 29m.
Cardiff to Harrow on the Hill bus services, operated by National Express, depart from Sophia Gardens station.
Cardiff to Harrow on the Hill bus services, operated by National Express, arrive at Heathrow Central Bus Station.
The distance between Cardiff and Harrow on the Hill is 196.7 km. The road distance is 238 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.