Slough to Portsmouth Harbour Trains

Slough to Portsmouth Harbour trains

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Trip Overview

The average train between Slough and Portsmouth Harbour takes 2h 38m and the fastest train takes 2h 22m. There is a train service every few hours from Slough to Portsmouth Harbour. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

2h 38m
Duration: 80 mi
Distance: £46
Average price: Hourly
Frequency

Train

best

Take the train from Slough to Readingtrain Elizabeth / ...
Take the train from Basingstoke to Portsmouth Harbourtrain London Waterloo - Portsmouth Harbour / ...

2h 51m

£33–84

Slough to Portsmouth Harbour train times

Trains run hourly between Slough and Portsmouth Harbour. The earliest departure is at 5:47 AM in the morning, and the last departure from Slough is at 9:54 PM which arrives into Portsmouth Harbour at 12:25 AM. All services require a transfer at Reading and take an average of 2h 38m. The schedules shown below are for the next available departures.

Departing Tuesday, August 18, 2026

5:47 AM → 8:15 AM
2h 27m • 2 changes
6:17 AM → 9:18 AM
3h 1m • 2 changes
7:54 AM → 10:18 AM
2h 23m • 2 changes
8:26 AM → 11:18 AM
2h 51m • 2 changes
Show more

Departing Wednesday, August 19, 2026

5:47 AM → 8:15 AM
2h 27m • 2 changes
6:17 AM → 9:18 AM
3h 1m • 2 changes
7:54 AM → 10:18 AM
2h 23m • 2 changes
8:26 AM → 11:18 AM
2h 51m • 2 changes
Show more

Departing Thursday, August 20, 2026

5:47 AM → 8:15 AM
2h 27m • 2 changes
6:17 AM → 9:18 AM
3h 1m • 2 changes
7:54 AM → 10:18 AM
2h 23m • 2 changes
8:26 AM → 11:18 AM
2h 51m • 2 changes
Show more

Frequently asked questions

Want to know about travelling from Slough to Portsmouth Harbour? 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.