The average bus between Harpenden and Cardiff takes 6h 22m and the fastest bus takes 5h 29m. There is a bus service every few hours from Harpenden 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 Harpenden and Cardiff. The earliest departure is at 4:41 AM at night, and the last departure from Harpenden is at 11:21 PM which arrives into Cardiff at 10:45 AM. All services require a transfer at Watford Junction station and take an average of 6h 22m. The schedules shown below are for the next available departures.


6h 4m • 2 changes


6h 19m • 2 changes


5h 58m • 2 changes


6h 18m • 2 changes


6h 4m • 2 changes


6h 19m • 2 changes


5h 58m • 2 changes


6h 18m • 2 changes


5h 53m • 2 changes


6h 18m • 2 changes


6h 23m • 2 changes


6h 18m • 2 changes


6h 33m • 2 changes


6h 40m • 2 changes


6h 35m • 2 changes


6h 30m • 2 changes
Want to know about travelling from Harpenden 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 Harpenden to Cardiff. However, there are services departing from Harpenden station and arriving at Cardiff station via Cardiff North Road. The journey, including transfers, takes approximately 6h 22m.
Harpenden to Cardiff bus services, operated by Arriva UK, depart from London Heathrow Airport station.
Harpenden to Cardiff bus services, operated by Arriva UK, arrive at Cardiff North Road station.
The distance between Harpenden and Cardiff is 198.3 km. The road distance is 292 km.
FlixBus operates a bus from London Heathrow Airport to Cardiff North Road hourly. Tickets cost £14–25 and the journey takes 3h 40m.