The average bus between Watford and Caerphilly takes 5h 35m and the fastest bus takes 4h 15m. The bus service runs several times per day from Watford to Caerphilly. 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 every 3 hours between Watford and Caerphilly. The earliest departure is at 5:57 AM in the morning, and the last departure from Watford is at 11:01 PM which arrives into Caerphilly at 7:40 AM. All services require a transfer at Heathrow Terminal 2 and take an average of 5h 35m. The schedules shown below are for the next available departures.


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Want to know about travelling from Watford to Caerphilly? 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 Watford to Caerphilly. However, there are services departing from Watford station and arriving at Caerphilly station via Kingsway K14. The journey, including transfers, takes approximately 5h 35m.
Watford to Caerphilly bus services, operated by First Berkshire & The Thames Valley, depart from Heathrow Central Bus Station.
Watford to Caerphilly bus services, operated by First Berkshire & The Thames Valley, arrive at Caerphilly Library / The Twyn station.
The distance between Watford and Caerphilly is 195 km. The road distance is 256 km.
You can take a bus from Town Hall to Caerphilly Library / The Twyn via Heathrow Terminal 2, Heathrow Central Bus Station, Kingsway K14, and Market Square 22 in around 4h 24m.