Train
Driving
Slough to Cardiff
Updated: 31 May 2026
The journey from Slough to Cardiff covers approximately 200 kilometers. By train, you travel via London Paddington for a direct service to Cardiff Central. By car, the route typically involves the M4 motorway. Cardiff is the capital of Wales and is famous for its castle and waterfront. The trip usually takes around 2.5 hours by either mode.
Total Distance: 200 km driving distance, 180 km straight-line air distance.
Fastest Way
Train is faster if you avoid M4 traffic.
Cheapest Way
Driving is generally cheaper for multiple passengers.
Compare Slough to Cardiff Routes
|
Direct
|
Direct
|
|
|---|---|---|
| Duration | 2 hours | 2 hours 30 mins |
| Avg Price | 50-90 GBP | 35-50 GBP in fuel |
| Operator | GWR | N/A |
| Route | Slough to Paddington, then direct to Cardiff Central | M4 motorway |
| Tip | GWR trains are fast and comfortable. | The M4 can be very congested near the Severn Bridge. |
Travel Tips
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Book Trains EarlyAdvance tickets save money on the London to Cardiff leg.
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Check M4 TrafficThe M4 is prone to heavy traffic during peak hours.
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Use PaddingtonIt is a beautiful station with many amenities.
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Walk the CityCardiff city center is compact and walkable.
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Visit the BayIt is a must-see for nightlife.
Safety Tips
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Station SafetyKeep your bags with you at all times in London stations.
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Night TravelStick to well-lit paths when walking at night.
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Road SafetyBe cautious on the M4 during heavy rain.
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Emergency NumbersKeep 999 saved in your phone for emergencies.
People Also Ask
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Is there a direct train?Yes, from London Paddington.
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How long is the drive?About 2.5 hours.
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Is Cardiff expensive?It is generally more affordable than London.
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Can I take a bus?Yes, but it is much slower than the train.
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What is the best time to visit?Summer is ideal for festivals.
Quick Info
- From Slough, Berkshire, United Kingdom
- To Cardiff, Cardiff, United Kingdom
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Modes
Best Time to Travel
Summer for the waterfront events and festivals.
Things to Do in Cardiff
1
Cardiff Castle
Explore the historic castle in the city center.
2
National Museum Cardiff
Discover art and natural history.
3
Cardiff Bay
Enjoy the vibrant waterfront area with bars and restaurants.
4
Principality Stadium
Visit the iconic home of Welsh rugby.
Tags
Slough to Cardiff
train to Cardiff
driving to Cardiff
M4 motorway
Cardiff travel guide
fastest way to Cardiff
Slough transport
Cardiff day trip
