The cheapest and fastest coaches from Carmarthen to Portsmouth
Cheapest price
£25
Average price
£25
Fastest journey
10 h 30 m
Average duration
10 h 30 m
Buses per day
1
Distance
252 km
The best way to find a cheap coach ticket from Carmarthen to Portsmouth is to book your journey as far in advance as possible and to avoid travelling at rush hour.
The average ticket from Carmarthen to Portsmouth will cost around £25 if you buy it on the day, but you can find cheap coach tickets today for only £25.
Of the 1 buses that leave Carmarthen for Portsmouth every day 1 travel direct so it’s quite easy to avoid journeys where you’ll have to change along the way.
These direct buses cover the 252 km distance in an average of 10 h 30 m but if you time it right, some buses will get you there in just 10 h 30 m .
The slowest buses will take 10 h 30 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.


Travel Information
Compare train and coach for Carmarthen to Portsmouth
Omio recommends booking the train as it is the most popular option from Carmarthen to Portsmouth among Omio's users. If you are prioritising price take the coach with prices starting from £25. For those with little time consider booking a train which can get you there in 5h 15m. The ticket price range depends on the travel mode: a coach costs an average of £25, and a train costs an average of £105.
Distance: 252 km
Compare bus with
| Coach | Most popular Train |
|---|---|
£39 Average Price Cheapest | £106 Average Price |
10h 34m Average total duration 10h 4m Onboard + 30m Additional time* | 5h 45m Average total duration Fastest 5h 15m Onboard + 30m Additional time* |
Direct Options | Direct Options |
Live departures
Carmarthen to Portsmouth bus times
The table below shows live departures for Carmarthen to Portsmouth coaches for tomorrow, Tuesday 23 December. You can also manually refresh the results below to see updated coach journeys.
| Provider | Departs | Duration | Arrives | Changes | Tickets |
|---|---|---|---|---|---|
![]() | 09:55 Carmarthen | 10h30 | 20:25 Portsmouth | 0 changesdirect | |
This is the last bus of the day. | |||||
Find all the dates and times for this journey
Compare prices and tickets Carmarthen to Portsmouth by train or coach
Compare train and coach 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.
23 Dec
24 Dec
25 Dec
26 Dec
27 Dec
28 Dec
29 Dec
Journey information
Overview: Bus from Carmarthen to Portsmouth
Buses from Carmarthen to Portsmouth run on average 5 times per day, taking around 10h 4m. Cheap bus tickets for this journey start at £25 if you book in advance.
The earliest coach runs at 04:04, the last at 19:00. The fastest coach covers the 252 km distance in 9h 25m.
Distance 252 km |
Average bus duration 10h 4m |
Cheapest ticket price £25 |
Buses per day 5 |
Fastest bus 9h 25m |
First bus 04:04 |
Last bus 19:00 |
FAQs: Carmarthen to Portsmouth coach
Find answers to the most common questions about traveling from Carmarthen to Portsmouth by coach. 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 coach, the cheapest option, or tips for making the most of your visit at Portsmouth, this guide helps you travel smarter and with confidence.

To find the cheapest bus tickets for your trip from Carmarthen to Portsmouth, follow these tips:
Start your search now and compare ticket prices to find the best deal!
popular bus stations
Important Stations and Airports in Carmarthen and Portsmouth
- The place has an entrance that is wheelchair-accessible
- 05:00-23:00
- Free Wi-Fi
- Café at The Hard (in the station)
- Fast Food Outlet (in the station).
- Available outside the main entrance.
- Elevators, ramps
- Available near the waiting area.
- Bus: 1, 2, 3, 7, 8, 13, 14 Train: South Western Railway, Southern, Great Western Railway
- 06:00-22:00
- Free Wi-Fi
- Café in the terminal (in the station)
- Fast-food outlet (in the station).
- Available outside the main entrance.
- Elevators, ramps
- Available in the station.
- Bus: 8, 20, 700 Train: Portsmouth Harbour
Most popular bus connections from Carmarthen
More options for your journey from Carmarthen to Portsmouth
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