The average bus between Harrow and Slough takes 1h 17m and the fastest bus takes 1h 15m. There is a bus service every few hours from Harrow 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 every 2 hours between Harrow and Slough. The earliest departure is at 12:08 AM at night, and the last departure from Harrow is at 11:38 PM which arrives into Slough at 12:57 AM. All services require a transfer, and take on average 1h 17m. The schedules shown below are for the next available departures.
Arrives next day

1h 19m • 1 change
Arrives next day

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Want to know about travelling from Harrow 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 Harrow to Slough. However, there are services departing from Harrow station and arriving at Slough station via Heathrow Central Bus Station station. The journey, including transfers, takes approximately 1h 17m.
Harrow to Slough bus services, operated by Metroline Travel, depart from Harrow Town Centre station.
Harrow to Slough bus services, operated by Metroline Travel, arrive at Wellington Street Stop H station.
The distance between Harrow and Slough is 19.5 km. The road distance is 32 km.
You can take a bus from Harrow Town Centre to Wellington Street Stop H via Heathrow Central Bus Station in around 1h 7m.