The average train between Chepstow and Porthmadog takes 7h 56m and the fastest train takes 5h 42m. The train service runs several times per day from Chepstow 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 Chepstow and Porthmadog. The earliest departure is at 6:48 AM in the morning, and the last departure from Chepstow is at 11:38 PM which arrives into Porthmadog at 2:54 PM. All services require a transfer at Newport (S Wales) and take an average of 7h 56m. The schedules shown below are for the next available departures.



5h 47m • 3 changes
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13h 30m • 3 changes
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11h 11m • 3 changes



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6h 2m • 3 changes



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6h 32m • 3 changes



6h 2m • 3 changes



6h 2m • 3 changes



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6h • 3 changes



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6h 2m • 3 changes
Want to know about travelling from Chepstow 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 Chepstow to Porthmadog. However, there are services departing from Chepstow station and arriving at Porthmadog station via Shrewsbury. The journey, including transfers, takes approximately 7h 56m.
Chepstow to Porthmadog train services, operated by Cross Country, depart from Newport (S Wales) station.
Chepstow to Porthmadog train services, operated by Cross Country, arrive at Porthmadog station.
Book your Chepstow to Porthmadog train tickets online with Cross Country and Transport for Wales.
The distance between Chepstow and Porthmadog is 173.7 km. The road distance is 347 km.
You can take a train from Chepstow to Porthmadog via Newport (S Wales), Shrewsbury, and Machynlleth in around 7h 46m.