The average bus between Watford and Sunbury-on-Thames takes 1h 44m and the fastest bus takes 1h 25m. The bus service runs several times per day from Watford to Sunbury-on-Thames. 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 Watford and Sunbury-on-Thames. The earliest departure is at 8:25 PM in the evening, and the last departure from Watford is at 11:01 PM which arrives into Sunbury-on-Thames at 12:41 AM. All services require a transfer at Heathrow Terminal 3 and take an average of 1h 44m. The schedules shown below are for the next available departures.

2h 13m • 1 change

1h 25m • 1 change
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1h 40m • 1 change

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1h 25m • 1 change
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1h 40m • 1 change

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2h 13m • 1 change

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1h 40m • 1 change
Want to know about travelling from Watford to Sunbury-on-Thames? 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 Sunbury-on-Thames. However, there are services departing from Watford station and arriving at Sunbury-on-Thames station via Heathrow Terminal 3. The journey, including transfers, takes approximately 1h 44m.
Watford to Sunbury-on-Thames bus services, operated by Arriva UK, depart from Town Hall station.
Watford to Sunbury-on-Thames bus services, operated by Arriva UK, arrive at Green Way station.
The distance between Watford and Sunbury-on-Thames is 28 km. The road distance is 54 km.
You can take a bus from Town Hall to Green Way via Heathrow Terminal 3, Heathrow Terminals 2 & 3, Heathrow Terminal 4, and Heathrow Terminal 4 in around 1h 57m.