Bus Tickets from Portsmouth to Cardiff

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TodaySep 3
TomorrowSep 4
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MonSep 8
TueSep 9
from $21
WedSep 10

Cheap buses leaving Tuesday

One passenger / one way

  • This trip is recommended because it is: Cheapest + Fastest
    Departure time: September 9 at
    Departure city: Portsmouth
    Departure location: Portsmouth University (o/s Students' Union)
    Arrival time: September 9 at
    Destination city: Cardiff
    Destination location: Cardiff (Gabalfa Interchange, o/s Roberts Optometrists)
    Operated by: National ExpressNational Express
    Vehicle: BusDuration:
  • Departure time: September 9 at
    Departure city: Portsmouth
    Departure location: Portsmouth University (o/s Students' Union)
    Arrival time: September 9 at
    Destination city: Cardiff
    Destination location: Cardiff (Gabalfa Interchange, o/s Roberts Optometrists)
    Operated by: National ExpressNational Express
    Vehicle: BusDuration:
  • Departure time: September 9 at
    Departure city: Portsmouth
    Departure location: Portsmouth University (o/s Students' Union)
    Arrival time: September 9 at
    Destination city: Cardiff
    Destination location: Cardiff (Gabalfa Interchange, o/s Roberts Optometrists)
    Operated by: National ExpressNational Express
    Vehicle: BusDuration:
  • Departure time: September 9 at
    Departure city: Portsmouth
    Departure location: Portsmouth University (o/s Students' Union)
    Arrival time: September 9 at
    Destination city: Cardiff
    Destination location: Cardiff (Gabalfa Interchange, o/s Roberts Optometrists)
    Operated by: National ExpressNational Express
    Vehicle: BusDuration:
  • Departure time: September 9 at
    Departure city: Portsmouth
    Departure location: Portsmouth University (o/s Students' Union)
    Arrival time: September 9 at
    Destination city: Cardiff
    Destination location: Cardiff (Gabalfa Interchange, o/s Roberts Optometrists)
    Operated by: National ExpressNational Express
    Vehicle: BusDuration:

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Compare 3 ways to go from Portsmouth to Cardiff.

Bus
Average Price$14 - $56Average Duration7h 20m
4kg CO₂e5 out of 5 stars
CheapestMost eco-friendly
Train
Average Price$105 - $329Average Duration3h 22m
4kg CO₂e5 out of 5 stars
Fastest
Carpool
Average Price$33 - $33Average Duration3h 40m
7kg CO₂e4 out of 5 stars
busbud logoBusbud recommends carpooling from Portsmouth to Cardiff

Among the sustainable travel choices, the carpool stands out as the good way to reach Cardiff. The journey takes about 3 hours 40 minutes and with fares starting at just $33, it presents an excellent value for a comfortable ride.

1carpool per day
3h 40mAverage Duration
$33Cheapest ticket
7kgCO₂ emissions

Bus Portsmouth to Cardiff: Trip Overview

Average ticket price$22
Average bus trip duration7h 20m
Number of daily buses10
Earliest bus departure3:05am
Distance103 miles (166 km)
Latest bus departure7:55pm

Portsmouth to Cardiff Bus

With Busbud, comparing and booking tickets for a bus from Portsmouth to Cardiff is a breeze. Browse through an extensive selection of bus fares and bus schedules to find the best deals.

We make sure you can find a bus service from Portsmouth to Cardiff from the most reliable bus companies operating this trip.

From cheap bus tickets to more luxurious buses traveling from Portsmouth to Cardiff, we offer a wide range of bus services to best suit your needs depending on how much your budget is.

Frequently asked questions for your trip Portsmouth - Cardiff

Find cheapest prices for buses

Price is for a one-way ticket for one passenger and based on past searches.

Best price found
09/01
$14
09/02
$15
Today
$13
09/04
$16
09/05
$38
09/06
$20
09/07
No data
09/08
$12
busbud logoThe cheapest trip from Portsmouth to Cardiff was searched and found on Sep 8, 2025 with a price of $12

To save money and be sure you have the best seat, it's a good idea to buy your bus tickets from Portsmouth to Cardiff, as early as possible.

You can expect to pay from $12 to $67 for a bus ticket from Portsmouth to Cardiff based on the last 2 days. You can expect to find the cheapest price for the trip at $12 which is on 2025-09-08.

About Bus Travel

Bus Travel Tips

Meet and talk to locals at the bus stations while traveling from Portsmouth to Cardiff.There is no better way to get inside travel information while exploring a new city than to go straight to its people.

Start sightseeing the minute your bus leaves the station. If you're on the night bus from Portsmouth to Cardiff, get comfy and count the stars.

Taking the bus creates the smallest carbon footprint compared to other modes of transport. Not to mention that buses will allow you to discover scenic gems from Portsmouth to Cardiff that are otherwise impossible to come by with a plane.

Create your own real life musical score by curating a personalized bus travel playlist - the perfect accompaniment to your bus ride from Portsmouth to Cardiff.

Did you know?

The bus driver with the longest career in the world drove more than 2,000,000 miles and is a happy World Record holder.

Did you know that 80% of the buses in North America are equipped with WiFi and power outlets ? And 60% of bus travelers have used their electronic device on board during 2014.

One of the longest bus route in the world goes all the way from Ontario to Alberta in Canada (with the same bus). This trip is 3,435 km or 2,135 miles long and the price is a bit under $100.

What's the cheapest way to go from Portsmouth to Cardiff?

busbud logoThe bus is the cheapest travel choice for this destination

Will you be returning to Portsmouth by bus?

Bus from Cardiff to Portsmouth

You can also go to Cardiff by train

Train from Portsmouth to Cardiff

Why choose Busbud?

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