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 |
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Compare 3 ways to go from London to Portsmouth.
Busbud recommends taking the bus from London to PortsmouthAmong the sustainable travel choices, the bus stands out as the good way to reach Portsmouth. The journey takes about 2 hours 11 minutes and with fares starting at just $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 for your trip London - Portsmouth
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 $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 $15 to $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 $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 traveled 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.
Top Traveled Train Routes
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