The average train between Harrow and Southwark takes 34 min and the fastest train takes 30 min. The train runs at least 13 times per hour 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.
Trains run every 5 minutes between Harrow and Southwark. The earliest departure is at 10:58 AM in the morning, and the last departure from Harrow is at 2:01 PM which arrives into Southwark at 2:34 PM. All services require a transfer, and take on average 34 min. The schedules shown below are for the next available departures.

34 min • 1 change

33 min • 1 change

35 min • 1 change

33 min • 1 change
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 train from Harrow to Southwark. However, there are services departing from Harrow station and arriving at Southwark station via Finchley Road station station. The journey, including transfers, takes approximately 34 min.
Harrow to Southwark train services, operated by London Underground (Tube), depart from Harrow-on-the-Hill station.
Harrow to Southwark train services, operated by London Underground (Tube), arrive at Southwark station.
Book your Harrow to Southwark train tickets online with London Underground (Tube).
The distance between Harrow and Southwark is 18.4 km. The road distance is 21 km.
You can take a subway from Harrow-on-the-Hill station to Southwark station via Finchley Road station in around 30 min.