The average bus between Southampton and Watford takes 3h 10m and the fastest bus takes 2h 49m. There is a bus service every few hours from Southampton to Watford. 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 Southampton and Watford. The earliest departure is at 2:20 AM at night, and the last departure from Southampton is at 9:25 PM which arrives into Watford at 12:18 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 3h 10m. The schedules shown below are for the next available departures.

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3h 39m • 1 changeWant to know about travelling from Southampton to Watford? 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 Southampton to Watford. However, there are services departing from Southampton station and arriving at Watford station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 3h 10m.
Southampton to Watford bus services, operated by National Express, depart from Coach Station.
Southampton to Watford bus services, operated by National Express, arrive at Town Hall station.
Book your Southampton to Watford bus tickets online with National Express and First Berkshire & The Thames Valley.
The distance between Southampton and Watford is 109.1 km. The road distance is 145 km.
You can take a bus from Coach Station to Town Hall via Heathrow Central Bus Station and Heathrow Terminal 3 in around 3h 3m.