How much does a train ticket from Portsmouth to Cardiff cost?

The average train ticket price from Portsmouth to Cardiff is $105. The best way to find train tickets from Portsmouth to Cardiff 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 train trip from Portsmouth to Cardiff?

A train trip between Portsmouth and Cardiff is around 3h 23m, although the fastest train will take about 3h 15m. This is the time it takes to travel the 102 miles that separates the two cities.

How many daily trains are there between Portsmouth and Cardiff?

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

Which train companies travel from Portsmouth to Cardiff?

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

What are the best sights and things to do in Cardiff?

Once in Cardiff, you can explore the city. The top sights and things to do are Brecon Beacons National Park, Cardiff International White Water, St John the Baptist Church, Cardiff Castle, Wales Millennium Centre.

Train Portsmouth to Cardiff from $40

Next train departures

Next departures for Portsmouth to Cardiff on November 25
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:24am	Portsmouth and Southsea	3h 28m	10:52am	Cardiff Central	Cheapest
Train	8:27am	Portsmouth and Southsea	3h 19m	11:46am	Cardiff Central	Fastest
Train	7:24am	Portsmouth and Southsea	3h 28m	10:52am	Cardiff Central	No tags
Train	8:27am	Portsmouth and Southsea	3h 19m	11:46am	Cardiff Central	No tags
Train	3:23pm	Portsmouth Harbour	3h 26m	6:49pm	Cardiff Central	No tags

Last refresh of the prices: Last Tuesday at 4:37 AM GMT.

Compare 3 ways to go from Portsmouth to Cardiff

We recommend carpooling

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 $18, it presents an excellent value for a comfortable ride.

1carpool per day

3h 40mAverage Duration

102 milesDistance

7kgCO₂ emissions

	Average Price	Average Duration	CO₂ emissions
Bus	Average Price$16 - $67	Average Duration7h 26m	CO₂ emissions 4kg CO₂e
Train	Average Price$42 - $108	Average Duration3h 23m	CO₂ emissions 4kg CO₂e
Carpool	Average Price$18 - $18	Average Duration3h 40m	CO₂ emissions 7kg 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. Travelers 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 $42

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

Frequently asked questions about traveling from Portsmouth to Cardiff by train

How much does a train ticket from Portsmouth to Cardiff cost?
How long is the train trip from Portsmouth to Cardiff?
How many daily trains are there between Portsmouth and Cardiff?
Which train companies travel from Portsmouth to Cardiff?
What are the best sights and things to do in Cardiff?

Find cheapest prices for trains

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

Best price found

11/21

$75

11/22

No data

Today

No data

11/24

No data

11/25

$99

11/26

No data

11/27

No data

11/28

$99

The cheapest trip from Portsmouth to Cardiff was searched and found on Nov 21, 2025 with a price of $75

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 $75 to $102 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 $99 which is on 2025-11-25.