The average bus between Harrow and Cardiff takes 4h 37m and the fastest bus takes 3h 57m. There is a bus service every few hours from Harrow 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 Harrow and Cardiff. The earliest departure is at 5:57 AM in the morning, and the last departure from Harrow is at 11:39 PM which arrives into Cardiff at 4:00 AM. All services require a transfer, and take on average 4h 37m. The schedules shown below are for the next available departures.

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Want to know about travelling from Harrow 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 Harrow to Cardiff. However, there are services departing from Harrow station and arriving at Cardiff station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 4h 37m.
Harrow to Cardiff bus services, operated by Metroline Travel, depart from Harrow Bus Station.
Harrow to Cardiff bus services, operated by Metroline Travel, arrive at Sophia Gardens station.
The distance between Harrow and Cardiff is 196.9 km. The road distance is 242 km.
You can take a bus from Harrow Bus Station to Sophia Gardens via Heathrow Central Bus Station in around 4h 47m.