How much is the train ticket from Portsmouth to Cardiff?

The cheapest train tickets from Portsmouth to Cardiff start from $42. The average price for this train route is around $105. Busbud recommends that you book your tickets in advance for a better chance to get the lowest possible price.

How long is the train journey from Portsmouth to Cardiff?

The average train ride duration from Portsmouth to Cardiff is 3h 23m, covering a distance of 102 miles (165 km). The quickest train can get you there in 3h 19m and is operated by Great Western Railway .

Which train operators service the Portsmouth to Cardiff route?

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

What is the earliest and latest departure time for the train from Portsmouth to Cardiff?

The earliest train departs from Portsmouth to Cardiff at 7:24am. And the latest train departs at 8:28pm.

Train Portsmouth to Cardiff from $40

Next train departures

Next departures for Portsmouth to Cardiff on December 5
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	3:23pm	Portsmouth Harbour	3h 26m	6:49pm	Cardiff Central	No tags
Train	3:27pm	Portsmouth and Southsea	3h 22m	6:49pm	Cardiff Central	No tags

Next departures for Portsmouth to Cardiff on December 8
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	3:23pm	Portsmouth Harbour	3h 26m	6:49pm	Cardiff Central	No tags
Train	3:27pm	Portsmouth and Southsea	3h 22m	6:49pm	Cardiff Central	No tags
Train	4:29pm	Portsmouth and Southsea	3h 22m	7:51pm	Cardiff Central	No tags

Last refresh of the prices: Last Sunday at 5:03 PM 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 - $69	Average Duration7h 26m	CO₂ emissions 4kg CO₂e
Train	Average Price$42 - $107	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

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

How much is the train ticket from Portsmouth to Cardiff?
The cheapest train tickets from Portsmouth to Cardiff start from $42. The average price for this train route is around $105. Busbud recommends that you book your tickets in advance for a better chance to get the lowest possible price.
How long is the train journey from Portsmouth to Cardiff?
The average train ride duration from Portsmouth to Cardiff is 3h 23m, covering a distance of 102 miles (165 km). The quickest train can get you there in 3h 19m and is operated by Great Western Railway.
Which train operators service the Portsmouth to Cardiff route?
Several major train operators operate on this route with 4 trains available per day.
What is the earliest and latest departure time for the train from Portsmouth to Cardiff?
The earliest train departs from Portsmouth to Cardiff at 7:24am. And the latest train departs at 8:28pm.

Find cheapest prices for trains

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

Best price found

12/01

$75

12/02

No data

Today

No data

12/04

No data

12/05

$100

12/06

No data

12/07

No data

12/08

$101

The cheapest trip from Portsmouth to Cardiff was searched and found on Dec 1, 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 $100 which is on 2025-12-05.