How much does a cheap train ticket from London to Portsmouth cost?

The average train ticket price from London to Portsmouth is $89. 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 5m, 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 53. 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.

Train London to Portsmouth from $21

Next train departures

Next departures for London to Portsmouth on November 30
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:27am	Clapham Junction	2h 46m	10:13am	Portsmouth and Southsea	Cheapest
Train	8:10am	Clapham Junction	1h 50m	10:00am	Portsmouth and Southsea	Fastest
Train	8:20am	Streatham	2h 32m	10:52am	Portsmouth and Southsea	No tags
Train	7:03am	Barnes	2h 52m	9:55am	Portsmouth and Southsea	No tags
Train	8:20am	Streatham	2h 32m	10:52am	Portsmouth and Southsea	No tags

Next departures for London to Portsmouth on December 1
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	3:12pm	Clapham Junction	2h 7m	5:19pm	Portsmouth and Southsea	Cheapest
Train	8:00am	Waterloo	1h 32m	9:32am	Portsmouth and Southsea	Fastest
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags
Train	7:04am	Barnes	2h	9:04am	Portsmouth and Southsea	No tags
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags

Next departures for London to Portsmouth on December 3
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	9:29am	Streatham	2h 8m	11:37am	Portsmouth and Southsea	Cheapest
Train	8:00am	Waterloo	1h 32m	9:32am	Portsmouth and Southsea	Fastest
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags
Train	7:04am	Barnes	2h	9:04am	Portsmouth and Southsea	No tags
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags

Next departures for London to Portsmouth on December 4
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	9:29am	Streatham	2h 8m	11:37am	Portsmouth and Southsea	Cheapest
Train	8:00am	Waterloo	1h 32m	9:32am	Portsmouth and Southsea	Fastest
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags
Train	7:04am	Barnes	2h	9:04am	Portsmouth and Southsea	No tags
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags

Next departures for London to Portsmouth on December 5
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	8:08am	Waterloo	2h 10m	10:18am	Portsmouth Harbour	Cheapest
Train	8:00am	Waterloo	1h 32m	9:32am	Portsmouth and Southsea	Fastest
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags
Train	7:04am	Barnes	2h	9:04am	Portsmouth and Southsea	No tags
Train	8:29am	Streatham	2h 9m	10:38am	Portsmouth and Southsea	No tags

Next departures for London to Portsmouth on December 6
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:27am	Waterloo	1h 32m	8:59am	Portsmouth and Southsea	Cheapest
Train	7:27am	Waterloo	1h 32m	8:59am	Portsmouth and Southsea	Fastest
Train	7:17am	Barnes	2h 16m	9:33am	Portsmouth and Southsea	No tags
Train	7:05am	Victoria Rail Station	2h 12m	9:17am	Portsmouth and Southsea	No tags
Train	7:17am	Barnes	2h 16m	9:33am	Portsmouth and Southsea	No tags

Last refresh of the prices: Yesterday at 7:35 PM GMT.

Compare 3 ways to go from London to Portsmouth

We recommend carpooling

Among the sustainable travel choices, the carpool stands out as a good way to reach Portsmouth. The journey takes about 2 hours 20 minutes, and with fares starting at just $12, it presents an excellent value for a comfortable ride.

1carpool per day

2h 20mAverage Duration

102 kmDistance

4kgCO₂ emissions

	Average Price	Average Duration	CO₂ emissions
Bus	Average Price$9 - $44	Average Duration2h 15m	CO₂ emissions 3kg CO₂e
Train	Average Price$22 - $187	Average Duration2h 5m	CO₂ emissions 3kg CO₂e
Carpool	Average Price$12 - $12	Average Duration2h 20m	CO₂ emissions 4kg CO₂e

Train companies

South Western Railway

4/525 reviews

Staff4.5

Timeliness4.1

Cleanliness4.5

Wifi3.4

Southern

4/534 reviews

Staff5

Timeliness5

Cleanliness5

Wifi5

GB train and bus companies:Amtrak, Trenitalia, Renfe, VIA Rail Canada, RegioJet, FlixTrain, CrossCountry

Frequently asked questions about travelling from London to Portsmouth by train

How much does a cheap train ticket from London to Portsmouth cost?
The average train ticket price from London to Portsmouth is $89. 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 5m, 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 53. 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.

Best price found

11-28

$56

11-29

$46

Today

$37

12-01

$41

12-02

$25

12-03

$31

12-04

$31

12-05

$37

The cheapest trip from London to Portsmouth was searched and found on Dec 2, 2025 with a price of $25

To 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 $25 to $179 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 $25 which is on 2025-12-02.

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.