Trains tickets from Portsmouth to Cardiff

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TodayJul 1
from $107
TomorrowJul 2
ThuJul 3
FriJul 4
SatJul 5
SunJul 6
MonJul 7
TueJul 8

Upcoming Train Schedules

One passenger / one way

  • This trip is recommended because it is: Cheapest
    Departure time: July 1 at
    Departure city: Portsmouth
    Departure location: Portsmouth and Southsea
    Arrival time: July 1 at
    Destination city: Cardiff
    Destination location: Cardiff Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • This trip is recommended because it is: Fastest
    Departure time: July 1 at
    Departure city: Portsmouth
    Departure location: Portsmouth and Southsea
    Arrival time: July 1 at
    Destination city: Cardiff
    Destination location: Cardiff Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • Departure time: July 1 at
    Departure city: Portsmouth
    Departure location: Portsmouth and Southsea
    Arrival time: July 1 at
    Destination city: Cardiff
    Destination location: Cardiff Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • Departure time: July 1 at
    Departure city: Portsmouth
    Departure location: Portsmouth and Southsea
    Arrival time: July 1 at
    Destination city: Cardiff
    Destination location: Cardiff Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:
  • Departure time: July 1 at
    Departure city: Portsmouth
    Departure location: Portsmouth and Southsea
    Arrival time: July 1 at
    Destination city: Cardiff
    Destination location: Cardiff Central
    Operated by: Great Western RailwayGreat Western Railway
    Vehicle: TrainDuration:

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Compare 3 ways to go from Portsmouth to Cardiff.

Bus
Average Price$14 - $69Average Duration7h 20m
4kg CO₂e5 out of 5 stars
CheapestMost eco-friendly
Train
Average Price$96 - $112Average Duration3h 22m
4kg CO₂e5 out of 5 stars
Fastest
Carpool
Average Price$33 - $33Average Duration3h 40m
7kg CO₂e4 out of 5 stars
busbud logoBusbud recommends carpooling from Portsmouth to Cardiff

Among the sustainable travel choices, the carpool stands out as the good way to reach Cardiff. The journey takes about 3 hours 40 minutes and with fares starting at just $33, it presents an excellent value for a comfortable ride.

1carpool per day
3h 40mAverage Duration
$33Cheapest ticket
7kgCO₂ emissions

Train Portsmouth to Cardiff: Trip Overview

Please note, this information is subject to change.

Average ticket price$108
Average train trip duration3h 22m
Number of daily trains6
Earliest train departure7:24am
Distance102 miles (164 km)
Latest train departure8:28pm

Portsmouth to Cardiff Train

With Busbud, comparing and booking tickets for a train from Portsmouth to Cardiff is a breeze. Browse through an extensive selection of train fares and train schedules to find the best deals.

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

From train tickets to high-end trains trip from Portsmouth to Cardiff, we offer a wide range of train services to best suit your needs depending on how much your budget is.

Frequently asked questions for your trip Portsmouth - Cardiff

Find cheapest prices for trains

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

Best price found
06/29
$101
06/30
No data
Today
$101
07/02
No data
07/03
$101
07/04
$101
07/05
$100
07/06
$92
busbud logoThe cheapest trip from Portsmouth to Cardiff was searched and found on Jul 6, 2025 with a price of $92

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

You can expect to pay from $92 to $103 for a train ticket from Portsmouth to Cardiff based on the last 2 days. You can expect to find the cheapest price for the trip at $92 which is on 2025-07-06.

About Train Travel

Train Travel Tips

Taking the fastest trains allows you to travel at speeds greater than 300 km/h. Taking a trip from Portsmouth to Cardiff is not only much quicker but more comfortable too! You can usually travel directly to the city centre and save time while you're at it.

Regional train? High-speed train? Whichever train to Cardiff 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.

The train emits up to 30x less CO2 for a trip between Portsmouth and Cardiff compared to the same trip made by plane or car. A truly ecological mode of transport that will allow you to easily reduce your carbon footprint.

Create your own real life musical score by curating a personalized train travel playlist - the perfect accompaniment to your bus ride from Portsmouth to Cardiff.

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 traveling more than 17,000 km.

New York holds the record for the most platforms and track numbers in a single station. Grand Central Station in Manhattan is one of the largest rail terminals in the world with more than 44 platforms and 67 tracks to accommodate passengers.

Will you be returning to Portsmouth by train?

Train from Cardiff to Portsmouth

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