The average bus between Watford and Slough takes 1h 33m and the fastest bus takes 1h 3m. There is an hourly bus service from Watford to Slough. 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 Watford and Slough. The earliest departure is at 4:10 AM at night, and the last departure from Watford is at 11:01 PM which arrives into Slough at 12:28 AM. All services require a transfer at Heathrow Terminal 2 and take an average of 1h 33m. The schedules shown below are for the next available departures.

1h 14m • 1 change

1h 23m • 1 change

1h 18m • 1 change

1h 25m • 1 change

1h 15m • 1 change

1h 11m • 1 change

1h 19m • 1 change

1h 23m • 1 change

1h 15m • 1 change

1h 11m • 1 change

1h 19m • 1 change

1h 23m • 1 change
Want to know about travelling from Watford to Slough? 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 Slough. However, there are services departing from Watford station and arriving at Slough station via Heathrow Terminal 2. The journey, including transfers, takes approximately 1h 33m.
Watford to Slough bus services, operated by First Berkshire & The Thames Valley, depart from Town Hall station.
Watford to Slough bus services, operated by First Berkshire & The Thames Valley, arrive at Wellington Street station.
The distance between Watford and Slough is 21.3 km. The road distance is 47 km.
You can take a bus from Town Hall to Wellington Street via Heathrow Terminal 2 and Heathrow Central Bus Station in around 1h 10m.