Next departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Streatham | Portsmouth and Southsea | Cheapest | |||||
 | Waterloo | Portsmouth and Southsea | Fastest | |||||
| Streatham | Portsmouth and Southsea | No tags | |||||
| Barnes | Portsmouth and Southsea | No tags | |||||
| Streatham | Portsmouth and Southsea | No tags |
Last refresh of the prices: Today at 12:46 AM BST.
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Compare 3 ways to go from London to Portsmouth
| Average Price | Average Duration | CO₂ emissions | |||
|---|---|---|---|---|---|
| Average PriceUS$6 - US$26 | Average Duration2h 11m | 3kg CO₂e5 out of 5 stars | Cheapest | ||
| Average PriceUS$15 - US$132 | Average Duration2h 3m | 2kg CO₂e5 out of 5 stars | FastestMost eco-friendly | ||
Carpool | Average PriceUS$13 - US$13 | Average Duration2h 20m | 4kg CO₂e4 out of 5 stars |
Busbud recommends taking the bus from London to PortsmouthAmong the sustainable travel choices, the bus stands out as a good way to reach Portsmouth. The journey takes about 2 hours 11 minutes, and with fares starting at just US$6, it presents an excellent value for a comfortable ride.
Train London to Portsmouth: Trip Overview
Please note, this information is subject to change
Train companies
London to Portsmouth Train
Busbud shows you the best train ticket fares and train schedules so you can easily plan and book a trip by train from London to Portsmouth.
Train service from London to Portsmouth will be provided by the most trusted companies.
Discover how much the train trip from London to Portsmouth will cost you. Use our filters and sorting features to find the cheapest train tickets or high-end trains.
Frequently asked questions on the trip London - Portsmouth
How much does a cheap train ticket from London to Portsmouth cost?
The average train ticket price from London to Portsmouth is US$64. The best way to find cheap train tickets from London to Portsmouth is to book your tickets as early as possible. Prices tend to rise as your travel date approaches, so book in advance to secure the best prices!
How long is the trip from London to Portsmouth?
A train trip between London and Portsmouth is around 2h 3m, although the fastest train will take about 1h 22m. This is the time it takes to travel the 104 km that separates the two cities.
How many daily trains are there between London and Portsmouth?
The number of trains from London to Portsmouth can differ depending on the day of the week. On average, there are 37. Some trains are direct while others include transferring trains. Simplify your train trip from London to Portsmouth by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from London to Portsmouth?
When taking the train from London to Portsmouth, you can travel comfortably and safely with South Western Railway, Southern.
Find cheapest prices for trains
Price is for a one-way ticket for one passenger and based on past searches.
The cheapest trip from London to Portsmouth was searched and found on Sep 26, 2025 with a price of US$15To save money and be sure you have the best seat, it's a good idea to buy your train tickets from London to Portsmouth, as early as possible.
You can expect to pay from US$15 to US$125 for a train ticket from London to Portsmouth based on the last 2 days. You can expect to find the cheapest price for the trip at US$15 which is on 2025-09-26.
Usually South Western Railway will charge you higher prices for tickets closer to the departure date. To find the best prices, you should be flexible on your date of travel.
About Train Travel
Train Travel Tips
Do you like to go fast? With high-speed trains going faster than 300 km/h on certain routes, the time will fly by. Taking a train between London and Portsmouth is also a great way to travel to arrive in the city centre and save more time for your stay in Portsmouth.
No matter if you plan to take a regional or high-speed train to Portsmouth, the planet will thank you. You’ll help to protect the beautiful landscapes that will unfold before your very eyes.
With up to 30x less CO2 emissions for your train journey between London and Portsmouth, the train is an ecological alternative to flights or personal cars.
Tune out to the fine sounds of your best music playlist on your train trip from London to Portsmouth while indulging in miles on end of beautiful scenic views.
Did you know?
The first high-speed train line was inaugurated in 1964, in Japan, to connect Tokyo with Osaka. It was during the Olympics that the first passengers travelled aboard the Shinkansen at a speed of 210 km / h.
Railway companies played a major role as early as 1883 in the use of time zones as we know them today.
Japanese trains are always on time, it is extremely infrequent to see breakdowns during peak periods. In the event of a delay of more than 5 minutes, the crew will personally apologize to each passenger.
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Why choose Busbud?
The Best Way To Book Bus and Train Tickets
Busbud makes bus travel easy. We help travellers find a bus, plot routes, and book intercity bus tickets all over the world. With several language and currency options available, Busbud seeks to cater to international bus travellers no matter where they are in the world. Busbud prides itself on its worldwide partnerships. We make it possible for you to buy tickets with its large network of trustworthy bus partners like Greyhound, Eurolines, ALSA, OUIBUS (BlaBlaBus), National Express and many others.
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