Next train departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Train | Cardiff Central | Portsmouth and Southsea | Cheapest | ||||
| Train | Cardiff Central | Portsmouth and Southsea | Fastest | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags |
Last refresh of the prices: Last Tuesday at 04:27 GMT.
Compare 3 ways to travel from Cardiff to Portsmouth
Among the sustainable travel choices, the carpool stands out as a good way to reach Portsmouth. The journey takes about 3 hours and with fares starting at just £25, it presents an excellent value for a comfortable ride.
Train Companies
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 £33
Frequently asked questions about travelling from Cardiff to Portsmouth 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 Cardiff to Portsmouth?
The cheapest train tickets from Cardiff to Portsmouth start from £33. 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 Cardiff to Portsmouth?
The average train journey time from Cardiff to Portsmouth is 3h 19m, covering a distance of 102 miles. The fastest train gets you there in 3h 15m and is operated by Great Western Railway.
Which train operators serve the Cardiff to Portsmouth route?
Several major train operators run on this route with 10 trains available per day.
What are the earliest and latest departure times for the train from Cardiff to Portsmouth?
The earliest train from Cardiff to Portsmouth departs at 07:27. And the latest train departs at 20:30.
Find cheapest prices for trains
Price is for a one-way ticket for one passenger and based on past searches.
The cheapest trip from Cardiff to Portsmouth was searched and found on 29 Nov 2025 with a price of £57To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Cardiff to Portsmouth as early as possible.
You can expect to pay from £57 to £78 for a train ticket from Cardiff to Portsmouth based on the last 2 days. You can expect to find the cheapest price for the trip at £57, which is on 2025-11-29.
