The average bus between Cardiff and Kew takes 5h 19m and the fastest bus takes 3h 22m. The bus service runs several times per day from Cardiff to Kew. 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 Kew. The earliest departure is at 1:40 AM at night, and the last departure from Cardiff is at 11:40 PM which arrives into Kew at 3:48 AM. All services require a transfer, and take on average 5h 19m. The schedules shown below are for the next available departures.

3h 32m • 1 change
Arrives next day

7h 56m • 1 change
Arrives next day

4h 8m • 1 change

3h 32m • 1 change
Arrives next day

7h 56m • 1 change
Arrives next day

4h 15m • 1 change

3h 49m • 1 change
Arrives next day

7h 58m • 1 change
Arrives next day

4h 15m • 1 change

3h 39m • 1 change
Arrives next day

7h 48m • 1 change
Arrives next day

4h 8m • 1 change
Want to know about travelling from Cardiff to Kew? 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 Kew. However, there are services departing from Cardiff station and arriving at Kew station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 5h 19m.
Cardiff to Kew bus services, operated by National Express, depart from Sophia Gardens station.
Cardiff to Kew bus services, operated by National Express, arrive at Heathrow Central Bus Station.
The distance between Cardiff and Kew is 200 km. The road distance is 233 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.