The average train between Portsmouth Harbour and Slough takes 2h 33m and the fastest train takes 2h 12m. There is a train service every few hours from Portsmouth Harbour 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.
Trains run hourly between Portsmouth Harbour and Slough. The earliest departure is at 4:54 AM at night, and the last departure from Portsmouth Harbour is at 8:55 PM which arrives into Slough at 11:38 PM. All services require a transfer at Basingstoke and take an average of 2h 33m. The schedules shown below are for the next available departures.


2h 37m • 2 changes


2h 26m • 2 changes


2h 36m • 2 changes


2h 26m • 2 changes


2h 42m • 2 changes


2h 25m • 2 changes


2h 12m • 2 changes


2h 34m • 2 changes


2h 42m • 2 changes


2h 25m • 2 changes


2h 12m • 2 changes


2h 34m • 2 changes
Want to know about travelling from Portsmouth Harbour 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 train from Portsmouth Harbour to Slough. However, there are services departing from Portsmouth Harbour station and arriving at Slough station via Basingstoke. The journey, including transfers, takes approximately 2h 33m.
Portsmouth Harbour to Slough train services, operated by South Western Railway, depart from Portsmouth Harbour station.
Portsmouth Harbour to Slough train services, operated by South Western Railway, arrive at Basingstoke station.
Book your Portsmouth Harbour to Slough train tickets online with South Western Railway, Cross Country and 2 other operators.
The distance between Portsmouth Harbour and Slough is 86.9 km. The road distance is 129 km.
South Western Railway operates a train from Portsmouth Harbour to Basingstoke hourly. Tickets cost £19–45 and the journey takes 1h 16m.