The average train between Cardiff and Porthmadog takes 6h 41m and the fastest train takes 5h 16m. The train service runs several times per day from Cardiff to Porthmadog. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 4 hours between Cardiff and Porthmadog. The earliest departure is at 4:33 AM at night, and the last departure from Cardiff is at 10:15 PM which arrives into Porthmadog at 12:38 PM. All services require a transfer at Shrewsbury and take an average of 6h 41m. The schedules shown below are for the next available departures.


6h 16m • 2 changes


5h 31m • 2 changes


5h 31m • 2 changes


5h 28m • 2 changes


6h 16m • 2 changes


5h 31m • 2 changes


5h 31m • 2 changes


5h 28m • 2 changes


6h 16m • 2 changes


5h 31m • 2 changes


5h 31m • 2 changes


5h 28m • 2 changes


6h 16m • 2 changes


5h 31m • 2 changes


5h 31m • 2 changes


5h 28m • 2 changes


6h 16m • 2 changes


5h 31m • 2 changes


5h 31m • 2 changes


5h 28m • 2 changes


6h 14m • 2 changes


5h 28m • 2 changes


5h 31m • 2 changes


5h 27m • 2 changes
Want to know about travelling from Cardiff to Porthmadog? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Cardiff to Porthmadog. However, there are services departing from Cardiff station and arriving at Porthmadog station via Shrewsbury. The journey, including transfers, takes approximately 6h 41m.
Cardiff to Porthmadog train services, operated by Transport for Wales, depart from Cardiff Central station.
Cardiff to Porthmadog train services, operated by Transport for Wales, arrive at Porthmadog station.
Book your Cardiff to Porthmadog train tickets online with Transport for Wales.
The distance between Cardiff and Porthmadog is 173.3 km. The road distance is 338 km.
You can take a train from Cardiff Central to Porthmadog via Shrewsbury and Machynlleth in around 7h 12m.