The average bus between Slough and Harrow takes 1h 36m and the fastest bus takes 1h 11m. The bus service runs several times per day from Slough to Harrow. 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 2 hours between Slough and Harrow. The earliest departure is at 12:02 AM at night, and the last departure from Slough is at 11:32 PM which arrives into Harrow at 1:15 AM. All services require a transfer, and take on average 1h 36m. The schedules shown below are for the next available departures.

1h 52m • 1 change
Arrives next day

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Arrives next day

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1h 14m • 1 change

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1h 14m • 1 change

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1h 41m • 1 change

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1h 14m • 1 change
Want to know about travelling from Slough to Harrow? 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 Slough to Harrow. However, there are services departing from Slough station and arriving at Harrow station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 1h 36m.
Slough to Harrow bus services, operated by First Berkshire & The Thames Valley, depart from Wellington Street Stop B station.
Slough to Harrow bus services, operated by First Berkshire & The Thames Valley, arrive at St Georges Centre station.
The distance between Slough and Harrow is 19.5 km. The road distance is 33 km.
You can take a bus from Wellington Street Stop B to St Georges Centre via Heathrow Central Bus Station in around 1h 41m.