The cheapest and fastest buses from London to Carmarthen
Cheapest price
$28
Average price
$31
Fastest journey
5 h 45 m
Average duration
5 h 45 m
Buses per day
2
Distance
291 km
The best way to find a cheap bus ticket from London to Carmarthen is to book your journey as far in advance as possible and to avoid traveling at rush hour.
The average ticket from London to Carmarthen will cost around $31 if you buy it on the day, but the cheapest tickets can be found for only $28.
Of the 2 buses that leave London for Carmarthen on Mon, Jun 01, 2 travel direct so it’s quite easy to avoid journeys where you’ll have to change along the way.
On Mon, Jun 01 the direct buses cover the 291 km distance in an average of 5 h 45 m but if you time it right, some buses will get you there in just 5 h 45 m .
On Mon, Jun 01 the slowest buses will take 5 h 45 m and usually involve a change or two along the way, but you might be able to save a few pennies if you’re on a budget.
11:00 AM5h45London4:45 PMCarmarthen$281One-way0 transfers
12:00 PM5h45London5:45 PMCarmarthen$341One-way0 transfers
12:00 PM5h45London5:45 PMCarmarthen$341One-way0 transfers
11:00 AM5h45London4:45 PMCarmarthen$281One-way0 transfers
Travel Information
Compare train and bus for London to Carmarthen
Omio recommends booking the train as it is the most popular option from London to Carmarthen among Omio's users. If you are prioritising price take the bus with prices starting from $27. For those with little time consider booking a train which can get you there in 3h 42m. In case you are seeking to minimise your carbon footprint the train is your best bet as it emits only 0.1 - 0.3kg. The ticket price range depends on the travel mode: a bus costs an average of $27, and a train costs an average of $65.
Distance: 180 miles (291 km)
Compare bus with
| Bus | Most popular Train | Driving |
|---|---|---|
$35 Average price Cheapest | $92 Average price | $95 Average price (fuel + tolls) |
6h 20m Average total duration 5h 50m Onboard + 30m Additional time* | 4h 12m Average total duration Fastest 3h 42m Onboard + 30m Additional time* | 3h 57m Average total duration (door-to-door) |
0.3 - 0.7kg CO2 emissions | 0.1 - 0.3kg CO2 emissions Lowest | - CO2 emissions |
![]() Most popular bus company | ![]() Most popular train company | Your own car or car rental |
Direct Options | Direct Options | Direct Options |
Additional time: Average total travel duration to departure point, security checks and transfers.
This is compared to other travel options from London to Carmarthen:
A bus is $56 (€45) less than a train for this route with tickets for a train from London to Carmarthen costing on average $92 (€74).
Other travel options to Carmarthen take longer:
Bus takes on average 5h 50m.
Tickets start at around $35 (€29) compared to roughly $95 (€77) in fuel and tolls — a saving of about $60 (€48). The journey takes 5h 50m versus 3h 57m by car, so you'll arrive a bit later, but you can use the time productively rather than spending it behind the wheel. No parking to sort, no fuel stops, and most coaches have Wi-Fi and power outlets.
Direct services are operated by National Express.
Driving is worth considering if you're on a tight schedule, travelling as a group (where fuel costs split several ways), or want the flexibility to stop along the way.
London to Carmarthen Bus Timetables
| Operator | Departure Time | Arrival Time | Duration | Departure days | Cheapest price |
|---|---|---|---|---|---|
Operator National Express | Departure Time 10:30AM | Arrival Time 05:00PM | Duration 6h30 | Departure days Tue, Wed, Thu | Cheapest price $53 |
Operator National Express | Departure Time 11:00AM | Arrival Time 04:45PM | Duration 5h45 | Departure days Mon | Cheapest price $28 |
Operator National Express | Departure Time 12:00PM | Arrival Time 05:45PM | Duration 5h45 | Departure days Everyday | Cheapest price $30 |
Live departures
London to Carmarthen bus times
The table below shows live departures for London to Carmarthen buses for today, Sunday, May 31. You can also manually refresh the results below to see updated bus journeys.
| Provider | Departs | Duration | Arrives | Transfers | Tickets |
|---|---|---|---|---|---|
NX508 | 12:00 PM London, Victoria Coach Station | 5h45 | 5:45 PM Carmarthen, Lammas Street (Rose and Crown Hotel) | 0 transfersDirect | |
This is the last bus of the day. | |||||
Find all the dates and times for this journey
Compare prices and tickets London to Carmarthen by train or bus
Compare train and bus prices over the next three weeks. See the best deals at a glance, find the lowest fares, and choose the option that fits your budget.
May 31
Jun 01
Jun 02
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Why should you book London to Carmarthen buses with Omio?
Why book with Omio vs National Express?
- Designed for International Travelers: Omio is in your language including 24/7 customer service and offers multiple payment options, including PayPal, credit cards, and bank transfer, in your preferred currency.
- Compare all your options: Omio allows you to compare National Express with all available travel options, which are train and bus to ensure you get the best deal for traveling from London to Carmarthen.
Why book with Omio over Wanderu?
- Multiple modes of transport: Omio allows you to compare travel options including train and bus to find the ideal travel option from London to Carmarthen.
Journey information
Overview: Bus from London to Carmarthen
Buses from London to Carmarthen run on average 2 times per day, taking around 5h 50m. Cheap bus tickets for this journey start at $27 (€21) if you book in advance.
There are 1 buses per day. The earliest bus runs at 03:27, the last at 22:49. The fastest bus covers the 180 miles (291 km) distance in 5h 45m.
Distance 180 miles (291 km) |
Average bus duration 5h 50m |
Cheapest ticket price $27 (€21) |
Buses per day 2 |
Direct buses 1 |
Fastest bus 5h 45m |
First bus 3:27 AM |
Last bus 10:49 PM |
Cheapest Month Nov |
Cheapest Day Wed |
High Season Jan - Mar |
Low Season Apr - Jun |
Busiest Day Fri |
Least Busy Day Mon |
Best time to book 49 days |
Bus providers: National Express from London to CarmarthenYou can travel by bus between London to Carmarthen with National Express for as low as $27 (€21). When you search for schedules and tickets, Omio will show you the best journey
National Express
FAQs: Bus from London to Carmarthen
Find answers to the most common questions about traveling from London to Carmarthen by bus. From journey times and ticket prices to direct connections, first and last departures, and even whether the route is scenic, our FAQs cover everything you need to plan your trip. Whether you’re looking for the fastest bus, the cheapest option, or tips for making the most of your visit at Carmarthen, this guide helps you travel smarter and with confidence.

- National Express
- Assistance
- Priority seating
- Accessible toilets.
- National Express
- You can cancel your ticket up to 24 hours before departure for a refund minus a cancellation fee. Changes can be up to 24 hours before departure for a fee.
- National Express
- Two medium-sized suitcases up to 20kg each and one small piece of hand luggage.
- National Express
- 10€ per additional bag.
popular bus stations
Popular bus stations from London to Carmarthen
- 06:00-23:00
- Free Wi-Fi
- Pret a Manger (in the station)
- Starbucks (in the station).
- Available outside the station on Buckingham Palace Road.
- Elevators, ramps
- Available in the station.
- Bus: 11, 44, 170, 211, C1, C10 Metro: Victoria Train: Southern, Gatwick Express
- The place has an entrance that is wheelchair-accessible
- The place has an entrance that is wheelchair-accessible
More options for your journey from London to Carmarthen
Here are some other resources that might have the information you need

