Is there a direct train?

No, you must change at Cardiff Central.

How long is the journey?

By train, it takes about 4.5 hours.

Yes, it is generally considered a safe city for tourists.

What is the best time to visit?

Late spring or early autumn for mild weather.

Yes, ferries operate from Plymouth to France and Spain.

Merthyr Tydfil

Plymouth

Train Driving

Merthyr Tydfil to Plymouth

Updated: 28 May 2026

Traveling from Merthyr Tydfil to Plymouth involves crossing the Severn Bridge and heading deep into the South West. The distance is approximately 240 km. Trains are the most comfortable option, though they require multiple changes. Driving takes you down the A38 through Devon, which can be slow during peak holiday seasons.

Total Distance: 240 km driving, 180 km air distance.

Fastest Way

Driving is the fastest, taking roughly 3 hours and 15 minutes.

Cheapest Way

Driving is generally cheaper for groups, while advance train tickets offer value for solo travelers.

Compare Merthyr Tydfil to Plymouth Routes

	Train Connecting	Driving Direct
Duration	4 hours 30 mins	3 hours 15 mins
Avg Price	50-110 GBP	40-60 GBP fuel
Operator	Great Western Railway	N/A
Route	Merthyr Tydfil to Cardiff, then GWR direct to Plymouth.	A470, M4, M5, and A38.
Tip	The GWR train from Cardiff to Plymouth offers scenic coastal views near Dawlish.	The A38 from Exeter to Plymouth is a dual carriageway but can be busy.

Travel Tips

Train Views
Sit on the right-hand side of the train from Exeter to Plymouth for sea views.
Booking
Use the Trainline app to monitor price drops for your specific travel date.
Traffic
Avoid the A38 on Friday afternoons during summer holidays.
Footwear
Bring comfortable walking shoes for the steep hills of the Barbican.
Local Transport
Use the Plymouth Citybus network for easy access to the city outskirts.

Safety Tips

Coastal Safety
Stay away from cliff edges at Plymouth Hoe during high winds.
Driving
The A38 has several speed cameras; maintain a steady speed.
Personal Safety
The Barbican is well-lit, but stick to main thoroughfares at night.
Emergency
Keep the number for local taxi firms saved in your phone.