The average bus between Harrow and Southwark takes 1h 23m and the fastest bus takes 1h 17m. There is a bus service every few hours from Harrow to Southwark. 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 Harrow and Southwark. The earliest departure is at 12:26 AM at night, and the last departure from Harrow is at 11:56 PM which arrives into Southwark at 1:17 AM. All services require a transfer at Trafalgar Square and take an average of 1h 23m. The schedules shown below are for the next available departures.

1h 27m • 1 change
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1h 19m • 1 change
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Want to know about travelling from Harrow to Southwark? 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 Southwark. However, there are services departing from Harrow station and arriving at Southwark station via Trafalgar Square. The journey, including transfers, takes approximately 1h 23m.
Harrow to Southwark bus services, operated by London Buses, depart from Harrow Bus Station.
Harrow to Southwark bus services, operated by London Buses, arrive at Trafalgar Square station.
The distance between Harrow and Southwark is 18.4 km. The road distance is 30 km.
London Buses operates a bus from Harrow Bus Station to Trafalgar Square hourly. Tickets cost £3–7 and the journey takes 1h 7m.