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 Monday at 10:27 PM GMT.
Compare 2 ways to go from Cardiff to Portsmouth
Among the sustainable travel choices, the Train stands out as a good way to reach Portsmouth. The journey takes about 3 hours 19 minutes, and with fares starting at just $28, 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 $28
Frequently asked questions about travelling from Cardiff to Portsmouth 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 Cardiff to Portsmouth?
The cheapest train tickets from Cardiff to Portsmouth start at $28. The average price for this train route is around $147. Busbud recommends booking your tickets in advance to increase your chances of getting the lowest possible price.
How long is the train ride from Cardiff to Portsmouth?
The average train trip from Cardiff to Portsmouth takes 3h 19m and covers 165 km. The quickest 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 serve 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 7:27am. The latest train departs at 8:30pm.
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 Feb 3, 2026 with a price of $27To 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 $27 to $141 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 $27 which is on 2026-02-03.
