Trains tickets from Cardiff to Southampton

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TodayMay 2
TomorrowMay 3
SunMay 4
MonMay 5
from US$50
TueMay 6
WedMay 7
ThuMay 8
FriMay 9

Trains leaving Monday

One passenger / one way

  • This trip is recommended because it is the: Cheapest
    Departure time: May 5 at
    Departure city: Cardiff
    Departure location: Cardiff Central
    Arrival time: May 5 at
    Destination city: Southampton
    Destination location: Southampton Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • This trip is recommended because it is the: Fastest
    Departure time: May 5 at
    Departure city: Cardiff
    Departure location: Cardiff Central
    Arrival time: May 5 at
    Destination city: Southampton
    Destination location: Southampton Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • Departure time: May 5 at
    Departure city: Cardiff
    Departure location: Cardiff Central
    Arrival time: May 5 at
    Destination city: Southampton
    Destination location: Southampton Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • Departure time: May 5 at
    Departure city: Cardiff
    Departure location: Cardiff Central
    Arrival time: May 5 at
    Destination city: Southampton
    Destination location: Southampton Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • Departure time: May 5 at
    Departure city: Cardiff
    Departure location: Cardiff Central
    Arrival time: May 5 at
    Destination city: Southampton
    Destination location: Southampton Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:

Last refresh of the prices: Last Wednesday at 5:43 PM BST.

Prices and availability are subject to change.

Accepted payments

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Compare 3 ways to go from Cardiff to Southampton

Bus
Average PriceUS$18 - US$60Average Duration6h 57m
3kg CO₂e5 out of 5 stars
Most eco-friendly
Train
Average PriceUS$36 - US$90Average Duration2h 36m
3kg CO₂e5 out of 5 stars
Fastest
Carpool
Average PriceUS$15 - US$15Average Duration2h 40m
6kg CO₂e4 out of 5 stars
Cheapest
busbud logoBusbud recommends carpooling from Cardiff to Southampton

Among the sustainable travel choices, the carpool stands out as a good way to reach Southampton. The journey takes about 2 hours 40 minutes, and with fares starting at just US$15, it presents an excellent value for a comfortable ride.

1carpool per day
2h 40mAverage Duration
US$15Cheapest ticket
6kgCO₂ emissions

Train Cardiff to Southampton: Trip Overview

Please note, this information is subject to change

Average Ticket PriceUS$50
Average train trip duration2h 36m
Number of daily trains7
Earliest train departure7:27am
Distance138 km
Latest train departure8:30pm

Cardiff to Southampton Train

Busbud helps you find a train from Cardiff to Southampton. Get the best fare and schedule, book a round trip ticket or find trains with WiFi and electrical outlets.

We make sure you can find a train service from Cardiff to Southampton from the most reliable train companies operating this trip.

Discover how much the train trip from Cardiff to Southampton 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 Cardiff - Southampton

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

    The average train ticket price from Cardiff to Southampton is US$50. 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!

  2. 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.

  3. 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 7. 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.

Find cheapest prices for trains

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

Best price found
04-30
US$47
05-01
US$48
Today
No data
05-03
No data
05-04
No data
05-05
US$48
05-06
US$58
05-07
No data
busbud logoThe cheapest trip from Cardiff to Southampton was searched and found on Apr 30, 2025 with a price of US$47

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 US$47 to US$77 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 US$48 which is on 2025-05-05.

About Train Travel

Train Travel Tips

There are many train stations in the world, check out the station pages on Busbud to get all information you need.

Regional train? High-speed train? Whichever train to Southampton you take, you’ll help reduce the environmental impact and carbon footprint of your trip. As you watch the landscapes unfold before your eyes, you can tell yourself that with this choice, you are making sure they remain protected.

With up to 30x less CO2 emissions for your train journey between Cardiff and Southampton, 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 Cardiff to Southampton while indulging in miles on end of beautiful scenic views.

Did you know?

One of the deepest train stations in the world is in Kiev. Located at a depth of 105 m, it was designed in this way to serve as a shelter in the event of an attack. The second deepest station is in China. Badaling station is located 60 m under the Great Wall of China!

The longest train journey in the world is between Europe and Asia. This long journey starts from Porto in Portugal and crosses the whole European continent to reach Hanoi in Vietnam in 12 days while travelling more than 17,000 km.

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.

Will you be returning to Cardiff by train?

Train from Southampton to Cardiff

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