How much does a cheap train ticket from Cardiff to Southampton cost?

The average train ticket price from Cardiff to Southampton is $121. The best way to find cheap train tickets from Cardiff to Southampton 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 Cardiff to Southampton?

A train trip between Cardiff and Southampton is around 2h 36m, although the fastest train will take about 2h 32m. This is the time it takes to travel the 140 km that separates the two cities.

How many daily trains are there between Cardiff and Southampton?

The number of trains from Cardiff to Southampton can differ depending on the day of the week. On average, there are 5. Some trains are direct while others include transferring trains. Simplify your train trip from Cardiff to Southampton by comparing and selecting the train that fits your travel style and budget on Busbud.

Which train companies travel from Cardiff to Southampton?

When taking the train from Cardiff to Southampton, you can travel comfortably and safely with Great Western Railway.

Train Cardiff to Southampton from $47

Previously seen trips

Next departures for Cardiff to Southampton on November 18
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	9:18am	Cardiff Central	3h 46m	1:04pm	Southampton Central	No tags
Train	10:25am	Cardiff Central	3h 38m	2:03pm	Southampton Central	No tags
Train	11:25am	Cardiff Central	3h 40m	3:05pm	Southampton Central	No tags
Train	3:25pm	Cardiff Central	3h 37m	7:02pm	Southampton Central	No tags
Train	5:25pm	Cardiff Central	3h 37m	9:02pm	Southampton Central	No tags

Compare 3 ways to go from Cardiff to Southampton

We recommend taking the train

Among the sustainable travel choices, the train stands out as a good way to reach Southampton. The journey takes about 2 hours 36 minutes, and with fares starting at just $48, it presents an excellent value for a comfortable ride.

5train per day

2h 36mAverage Duration

139 kmDistance

3kgCO₂ emissions

	Average Price	Average Duration	CO₂ emissions
Bus	Average Price$27 - $114	Average Duration7h 7m	CO₂ emissions 3kg CO₂e
Train	Average Price$48 - $426	Average Duration2h 36m	CO₂ emissions 3kg CO₂e
Carpool	Average Price$21 - $21	Average Duration2h 40m	CO₂ emissions 6kg CO₂e

Train companies

Great Western Railway

4/542 reviews

Staff5

Timeliness4.7

Cleanliness4.7

Wifi4

Based on 42 reviews, the company was rated 4 stars on Busbud. Travellers were especially satisfied with the staff and the seats but often complained with the WiFi. Great Western Railway ticket prices on this trip start at $48

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

Where are the popular train stations and stops in Cardiff and Southampton?

Stops in Cardiff

A - Cardiff Central

Stops in Southampton

A - Southampton Airport

Frequently asked questions about travelling from Cardiff to Southampton by train

How much does a cheap train ticket from Cardiff to Southampton cost?
The average train ticket price from Cardiff to Southampton is $121. The best way to find cheap train tickets from Cardiff to Southampton 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 Cardiff to Southampton?
A train trip between Cardiff and Southampton is around 2h 36m, although the fastest train will take about 2h 32m. This is the time it takes to travel the 140 km that separates the two cities.
How many daily trains are there between Cardiff and Southampton?
The number of trains from Cardiff to Southampton can differ depending on the day of the week. On average, there are 5. Some trains are direct while others include transferring trains. Simplify your train trip from Cardiff to Southampton by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from Cardiff to Southampton?
When taking the train from Cardiff to Southampton, you can travel comfortably and safely with Great Western Railway.

Find cheapest prices for trains

Price is for a one-way ticket for one passenger and based on past searches.

Best price found

11-16

No data

11-17

$115

Today

No data

11-19

$88

11-20

$88

11-21

$86

11-22

No data

11-23

No data

The cheapest trip from Cardiff to Southampton was searched and found on Nov 21, 2025 with a price of $86

To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Cardiff to Southampton, as early as possible.

You can expect to pay from $86 to $119 for a train ticket from Cardiff to Southampton based on the last 2 days. You can expect to find the cheapest price for the trip at $86 which is on 2025-11-21.