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Trains from Knebworth to Portsmouth

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Great Western Railway

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  1. Home
  2. Train times
  3. Knebworth to Portsmouth

Trains to Portsmouth from Knebworth

First train

04:33

Last train

14:46

Departure stationKnebworth
Arrival stationPortsmouth
Journey time

From 3h 13m

Distance

82 miles (132 km)

Frequency

18 trains per day

Changes

2 changes

Train operators

Great Northern, Great Western Railway, South Western Railway, Southeastern, Southern, Thameslink

What are the train times from Knebworth to Portsmouth?

Check out the next trains departing from Knebworth to Portsmouth for Tuesday 10th November 2026 using our handy timetable below, including platform and live travel information. You can view the full day timetable or search for a different date here.
DepartsArrivesDuration
13:1616:473h 31m, 2 changes
13:4217:163h 34m, 2 changes
13:4617:163h 30m, 4 changes
13:4617:193h 33m, 2 changes
14:1217:343h 22m, 2 changes
14:1617:343h 18m, 4 changes
14:1617:393h 23m, 2 changes
14:4218:043h 22m, 2 changes
14:4618:043h 18m, 4 changes
14:4618:163h 30m, 2 changes

Plan your journey from Knebworth to Portsmouth

Considering a trip to Portsmouth and need more information on how to take the train from Knebworth to Portsmouth? Start your search with us today!

Usually, the train from Knebworth to Portsmouth takes around 3 hours 42 minutes. Every day, there are around 18 trains running on this popular route.

There will be 2 changes on your journey from Knebworth to Portsmouth, as there are no direct trains.

Trains on this route are operated by Great Western Railway, South Western Railway, Southeastern and Thameslink.

Booking tickets in advance can be cheaper than buying on the day of travel.

Use our Journey Planner to pick the dates and times you want to travel, and we’ll give you all the options.

What do people frequently ask about the train journey from Knebworth to Portsmouth?

Want to know more about your journey from Knebworth to Portsmouth? We've compiled some of the most frequently asked questions by our customers to help you plan your journey.

How do you get to Portsmouth from Knebworth?

To travel to Portsmouth from Knebworth, you can take the train - on average, the journey takes around 3 hours and 42 minutes, though the fastest trains can take 3 hours and 13 minutes. Use our Journey Planner to get more information.

How long is the train ride from Knebworth to Portsmouth?

Trains from Knebworth to Portsmouth take an average of 3 hours and 42 minutes, although on the fastest services it can take just 3 hours and 13 minutes. You'll usually find 18 trains per day on this route, so use our Journey Planner to check specific dates as times may vary.

What is the quickest journey time between Knebworth and Portsmouth by train?

The quickest journey time between Knebworth and Portsmouth by train is 3 hours and 13 minutes.

Are there direct trains from Knebworth to Portsmouth?

No, there are no direct trains running from Knebworth to Portsmouth, you’ll usually need to make at least 2 changes during the journey.

How do I find cheap train tickets from Knebworth to Portsmouth?

As most UK train companies increase their prices as the departure date approaches, our Trainline team of experts have put together these tips to help you find the cheapest tickets.

1. Sign up to Ticket Alert

If you're planning a trip more than 12 weeks ahead, sign up to our Ticket Alert to get notified when Advance tickets are released for your travel date.

2. Use a Railcard

National Railcards offer a 1/3 off eligible train tickets in the UK and can be a great investment if you travel throughout the year. Buy one with us and you'll be able to store it digitally in our app, so you'll always have it on your travels.

3. Book split tickets

Our handy feature SplitSave will 'split' your train journey into multiple tickets, which can be much cheaper than buying a single ticket. Find out more about split tickets.

4. Travel Off-Peak

If you can be flexible with your travel times, Off-Peak and Super Off-Peak tickets are usually cheaper in the UK. Generally, Off-Peak times are any time at weekends and outside of Monday to Friday morning and evening rush hours.

5. Consider a Season Ticket

Best for commuters, if you catch a train on the same route more than 3 times per week, you could save money with a Season Ticket. With annual, monthly, weekly and flexi options available, find out if a Season Ticket for Knebworth to Portsmouth is right for you.

For more money-saving tips on UK and European train travel, read our cheap train tickets guide.

§Advance adult single fare. Excludes booking fee. Prices seen by Trainline customers in the last 30 days. Availability limited.
† Average savings on advance fares booked at least one week before day of travel vs Anytime fares purchased on day of travel. Subject to availability. Excludes coach.

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