Famous road · 8 mi off the route
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Road trip route · United Kingdom
London to Cardiff drive time, distance, costs & the best stops
- Drive time
- 3 hr 7 min
- Distance
- 150 mi
- Fuel (est.)
- £25
- Tolls (est.)
- None
The London to Cardiff drive
The drive from London to Cardiff covers 150 miles (242 km) and takes about 3 hr 7 min without stops. That makes it a comfortable one-day drive. Leave in the morning and you'll arrive with the day ahead of you.
Most of it is one road: the M4 carries 90% of the distance. On the way you go past Slough, Reading and Newbury, and you'll be near Swindon roughly 1 h 39 min in.
Expect gentle hills rather than climbs. The high point is around 220 m near Swindon. The A466 Wye Valley (Chepstow to Monmouth) is 8 mi off the route if you have time for a detour.
Expect fuel for a typical petrol car (~40 mpg) to cost around £25 one-way with no significant motorway tolls on the way. Prices shift monthly, so treat these as ballpark figures.
At 150 miles this is longer than 32% of the 144 routes covered here.
The road, mile by mile
Towns within a few miles of the fastest route, with the time it takes to reach them without stopping.
- StartLondon
- 22 miSlough27 min in
- 41 miReading51 min in
- 57 miNewbury1 h 11 min in
- 79 miSwindon1 h 39 min in
- 96 miChippenham1 h 59 min ingood place to stop
- 112 miKingswood2 h 19 min in
- 137 miNewport2 h 51 min in
- 150 miCardiff
How high it goes
Roads you'll be on
- M4135 mi · 90%
- A47 mi · 5%
Famous roads on or near the drive
From the 500-plus passes and driving roads drivers collect in the Plan Your Road Trips app. None are on the fastest route, but these are close enough for a detour.
Best stops between London and Cardiff
Within ~30 km of the driving route, worth the detour.
Landmarks
Bibury
Charming Cotswolds village famously described by William Morris as the most beautiful village in England, home to the iconic Arlington Row.
Ancient Ruins
Roman Baths, Bath
Remarkably preserved Roman bathing complex fed by Britain's only natural hot springs, surrounded by elegant Georgian architecture.
Ancient Ruins
Avebury Stone Circle
Largest prehistoric stone circle in the world, enclosing an entire village and considered by many to be more atmospheric than Stonehenge.
Racetracks
Castle Combe Circuit
A charming Wiltshire circuit in a picturesque Cotswolds village, one of England's oldest operational racing venues.
Museums
Brooklands Museum
The birthplace of British motorsport and aviation, featuring the world's first purpose-built motor racing circuit from 1907.
Landmarks
Thorpe Park
Thrill-focused theme park near London catering to older children and adults with intense roller coasters.
Scenic Viewpoints
Devil's Pulpit
A narrow limestone pinnacle perched above the Wye Valley near Tintern Abbey, offering a dizzying view down through the forest canopy.
Landmarks
Castle Combe
A film-set medieval village of honey cottages with no visible modern intrusions, often called England's prettiest village.
Famous Bridges
Clifton Suspension Bridge
Isambard Kingdom Brunel's iconic 1864 suspension bridge soaring 75m above the Avon Gorge at Bristol, still carrying traffic and glowing with lights after dark.
What you need for this drive
Rules for each country on the route, in the order you meet them.
United Kingdom
- Motorway
- 112 km/h · 48 in town
- Tolls
- Individual tolled crossings (Dart Charge, M6 Toll)
- Drives on
- the left
Low-emission zones: London ULEZ (Ultra Low Emission Zone).
Checked against national road authorities and the ECB reference rates. Rules change — confirm before you travel.
Famous drives in United Kingdom
Legendary routes you could bolt onto this trip, with real distances and stop counts.
Snake Pass + Peak District
Cobblestone villages, Bronte-novel moors, and the moodiest 14 miles of road in England
104 km · 2h driving · 7 stops · 3 days
Atlantic Highway A39: North Cornwall
Cornish surf beaches, smuggler's coves, and the Westcountry pasty trail
139 km · 2.5h driving · 7 stops · 4 days
Causeway Coastal Route
Belfast to Derry along Northern Ireland's cliff-edge coast, via Game of Thrones country
200 km · 3.3h driving · 7 stops · 3 days
NC500: North Coast 500
Scotland's answer to Route 66: 516 miles of mountains, single-track roads, and empty beaches
755 km · 11.4h driving · 9 stops · 7 days
London to Cardiff FAQs
How long is the drive from London to Cardiff?
Driving from London to Cardiff takes about 3 hr 7 min nonstop, covering 150 miles (242 km). Add time for breaks: most drivers stop every 2 hours.
How much does it cost to drive from London to Cardiff?
Fuel for a typical petrol car (~40 mpg) costs roughly £25 one-way. There are no significant motorway tolls on this route. Estimates are indicative: prices change monthly.
Can I drive from London to Cardiff in one day?
Yes, at about 3 hr 7 min of driving, London to Cardiff is a comfortable one-day drive with a couple of breaks.
Which roads do you take from London to Cardiff?
The fastest route uses the M4 (about 135 mi), the A4 (about 7 mi). It passes Slough, Reading, Newbury, Swindon.
Where should I stop on the way from London to Cardiff?
If you stop every couple of hours, Chippenham comes up about 2 h in. All are just off the main road.
What other drives can I plan on Plan Your Road Trips?
We publish drive times, distances and fuel estimates for 144 routes across Europe and beyond, including 57 other drives in the same country. Browse them all on the routes index.
What are the best stops between London and Cardiff?
Top-rated stops in the drive corridor include Bibury, Roman Baths, Bath, Avebury Stone Circle: see the full list of 9 stops on this page.
More drives from London & Cardiff
Birmingham → CardiffBristol → CardiffLiverpool → CardiffLondon → AberdeenLondon → AmsterdamLondon → BarcelonaLondon → BathLondon → BirminghamLondon → BrightonLondon → Bristol
Planning a bigger trip? Try the free United Kingdom road trip planner, browse every destination we cover, take it with you on the road, or read the driving in United Kingdom guide.