Train tickets from Portsmouth to Cardiff

Next train departures

Next departures for Portsmouth to Cardiff on November 25
Operated byVehicle typeDeparture timeDeparture locationTrip durationArrival timeArrival locationRecommendedPrice and booking link
Great Western RailwayTrain
Portsmouth and Southsea
Cardiff CentralCheapest
Great Western RailwayTrain
Portsmouth and Southsea
Cardiff CentralFastest
Great Western RailwayTrain
Portsmouth and Southsea
Cardiff CentralNo tags
Great Western RailwayTrain
Portsmouth and Southsea
Cardiff CentralNo tags
Great Western RailwayTrain
Portsmouth Harbour
Cardiff CentralNo 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$16 - $67Average Duration7h 26m
4kg CO₂e
Average Price$42 - $108Average Duration3h 23m
4kg CO₂e
Carpool
Average Price$18 - $18Average Duration3h 40m
7kg CO₂e

Frequently asked questions about traveling from Portsmouth to Cardiff by train

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
busbud logoThe 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.

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