The average train between Clapham and Portsmouth takes 2h and the fastest train takes 1h 45m. There is a train service every few hours from Clapham to Portsmouth. 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 hourly between Clapham and Portsmouth. The earliest departure is at 5:28 AM in the morning, and the last departure from Clapham is at 7:38 PM which arrives into Portsmouth at 9:42 PM. All services require a transfer at Waterloo station and take an average of 2h. The schedules shown below are for the next available departures.

2h 17m • 1 change

2h 9m • 1 change

1h 51m • 1 change

1h 49m • 1 change

2h 17m • 1 change

2h 9m • 1 change

1h 51m • 1 change

1h 49m • 1 change

2h 17m • 1 change

2h 9m • 1 change

1h 51m • 1 change

1h 49m • 1 change
Want to know about travelling from Clapham to Portsmouth? 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 Clapham to Portsmouth. However, there are services departing from Clapham station and arriving at Portsmouth station via Portsmouth & Southsea. The journey, including transfers, takes approximately 2h.
Clapham to Portsmouth train services, operated by London Underground (Tube), depart from London Waterloo station.
Clapham to Portsmouth train services, operated by London Underground (Tube), arrive at Portsmouth & Southsea station.
The distance between Clapham and Portsmouth is 99.3 km. The road distance is 123 km.
South Western Railway operates a train from London Waterloo to Portsmouth & Southsea every 20 minutes. Tickets cost £29–70 and the journey takes 1h 28m.