Train
Driving
Carmarthenshire to Portsmouth
Updated: 30 May 2026
The journey from Carmarthenshire to Portsmouth is approximately 350 km. Driving is the most direct method, utilizing the M4 and A34. Rail travel requires a change at Bristol Temple Meads. Portsmouth is a historic naval city and home to the HMS Victory. Expect a travel time of 4 hours 30 minutes by car.
Total Distance: 350 km driving, 250 km air distance.
Fastest Way
Driving, 4 hours 30 mins, via M4/A34.
Cheapest Way
Train, 55 GBP, booked in advance.
Compare Carmarthenshire to Portsmouth Routes
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Connecting
|
Direct
|
|
|---|---|---|
| Duration | 5 hours 30 mins | 4 hours 30 mins |
| Avg Price | 55-130 GBP | 60-80 GBP |
| Operator | Great Western Railway | N/A |
| Route | Carmarthen to Bristol Temple Meads to Portsmouth Harbour | M4, A34, M27 |
| Tip | Trains are frequent from Bristol. | The A34 can be busy. |
Travel Tips
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TrafficAvoid the M27 during rush hour.
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RailcardUse a Railcard for savings.
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ParkingUse the Gunwharf Quays car park.
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BookingBook train tickets early.
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Local TransportPortsmouth has a good bus network.
Safety Tips
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DrivingBe careful on the A34.
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StationPortsmouth Harbour is busy.
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NavigationUse GPS for city driving.
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EmergencyKeep a breakdown cover contact.
People Also Ask
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Is Portsmouth far from Wales?It is about 4.5 hours by car.
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Can I take a bus?National Express is available.
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Is the train direct?No, change at Bristol.
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Best time to visit?Summer.
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Is parking expensive?Reasonable.
Quick Info
- From Carmarthenshire, Wales, United Kingdom
- To Portsmouth, Hampshire, United Kingdom
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Modes
Best Time to Travel
Summer for visiting the Historic Dockyard.
Things to Do in Portsmouth
1
Portsmouth Historic Dockyard
Home to HMS Victory and the Mary Rose Museum.
2
Spinnaker Tower
A landmark tower offering views of the Solent.
3
Gunwharf Quays
A popular shopping and dining destination.
4
Southsea Castle
A historic fort built by Henry VIII.
Tags
Carmarthenshire to Portsmouth
driving to Portsmouth
train to Portsmouth
M4 route
travel from Wales to Hampshire
GWR train
Portsmouth transport
cheapest travel to Portsmouth
