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

The cheapest train tickets from Portsmouth to Cardiff start from £32. The average price for this train route is around £81. Busbud recommends booking your tickets in advance for the best chance of getting the lowest possible price.

How long is the train journey from Portsmouth to Cardiff?

The average train journey time from Portsmouth to Cardiff is 3h 23m, covering a distance of 102 miles. The fastest train gets you there in 3h 19m and is operated by Great Western Railway .

Which train operators serve the Portsmouth to Cardiff route?

Several major train operators run on this route with 4 trains available per day.

What are the earliest and latest departure times for the train from Portsmouth to Cardiff?

The earliest train from Portsmouth to Cardiff departs at 07:24. And the latest train departs at 20:28.

Train Portsmouth to Cardiff from £31

Next train departures

Next departures from Portsmouth to Cardiff on 5 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	07:24	Portsmouth and Southsea	3h 28m	10:52	Cardiff Central	Cheapest
Train	08:27	Portsmouth and Southsea	3h 19m	11:46	Cardiff Central	Fastest
Train	07:24	Portsmouth and Southsea	3h 28m	10:52	Cardiff Central	No tags
Train	15:23	Portsmouth Harbour	3h 26m	18:49	Cardiff Central	No tags
Train	15:27	Portsmouth and Southsea	3h 22m	18:49	Cardiff Central	No tags

Next departures from Portsmouth to Cardiff on 8 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	07:24	Portsmouth and Southsea	3h 28m	10:52	Cardiff Central	Cheapest
Train	08:27	Portsmouth and Southsea	3h 19m	11:46	Cardiff Central	Fastest
Train	15:23	Portsmouth Harbour	3h 26m	18:49	Cardiff Central	No tags
Train	15:27	Portsmouth and Southsea	3h 22m	18:49	Cardiff Central	No tags
Train	16:29	Portsmouth and Southsea	3h 22m	19:51	Cardiff Central	No tags

Last refresh of the prices: Last Sunday at 17:03 GMT.

Compare 3 ways to travel from Portsmouth to Cardiff

We recommend carpooling

Among the sustainable travel choices, the carpool stands out as a good way to reach Cardiff. The journey takes about 3 hours 40 minutes and with fares starting at just £14, 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£12 - £53	Average duration7h 26m	CO₂ emissions 4kg CO₂e
Train	Average price£32 - £82	Average duration3h 23m	CO₂ emissions 4kg CO₂e
Carpool	Average price£14 - £14	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. Travellers were especially satisfied with the staff and the seats but often complained with the Wi-Fi. Great Western Railway ticket prices on this trip start at £32

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

Frequently asked questions about travelling from Portsmouth to Cardiff by train

Please note that timetables, routes, or operator details shown here may be updated or vary at the time of your journey.

How much does a train ticket cost from Portsmouth to Cardiff?
The cheapest train tickets from Portsmouth to Cardiff start from £32. The average price for this train route is around £81. Busbud recommends booking your tickets in advance for the best chance of getting the lowest possible price.
How long is the train journey from Portsmouth to Cardiff?
The average train journey time from Portsmouth to Cardiff is 3h 23m, covering a distance of 102 miles. The fastest train gets you there in 3h 19m and is operated by Great Western Railway.
Which train operators serve the Portsmouth to Cardiff route?
Several major train operators run on this route with 4 trains available per day.
What are the earliest and latest departure times for the train from Portsmouth to Cardiff?
The earliest train from Portsmouth to Cardiff departs at 07:24. And the latest train departs at 20:28.

Find cheapest prices for trains

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

Best price found

02/12

No data

03/12

No data

Today

No data

05/12

£77

06/12

No data

07/12

No data

08/12

£78

09/12

£78

The cheapest trip from Portsmouth to Cardiff was searched and found on 5 Dec 2025 with a price of £77

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 £77 to £78 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 £77, which is on 2025-12-05.