Bus Tickets from Cardiff to Portsmouth

Next departures

Next departures for Cardiff to Portsmouth on October 17
Operated byVehicle typeDeparture timeDeparture locationTrip durationArrival timeArrival locationRecommendedPrice and booking link
National Express
Cardiff (Gabalfa Interchange, o/s Clinic)
Portsmouth University (Spinnaker Sports Centre)CheapestFastest
National Express
Cardiff (Gabalfa Interchange, o/s Clinic)
Portsmouth University (Spinnaker Sports Centre)No tags
National Express
Cardiff (Gabalfa Interchange, o/s Clinic)
Portsmouth University (Spinnaker Sports Centre)No tags
National Express
Cardiff (Gabalfa Interchange, o/s Clinic)
Portsmouth University (Spinnaker Sports Centre)No tags
National Express
Cardiff (Gabalfa Interchange, o/s Clinic)
Portsmouth University (Spinnaker Sports Centre)No tags

Last refresh of the prices: Yesterday at 3:20 AM BST.

Accepted payments

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Compare 3 ways to go from Cardiff to Portsmouth.

Bus
Average Price$15 - $54Average Duration7h 17m
4kg CO₂e5 out of 5 stars
CheapestMost eco-friendly
Train
Average Price$77 - $109Average Duration3h 19m
4kg CO₂e5 out of 5 stars
Carpool
Average Price$32 - $32Average Duration3h
7kg CO₂e4 out of 5 stars
Fastest
busbud logoBusbud recommends taking the bus from Cardiff to Portsmouth

Among the sustainable travel choices, the bus stands out as the good way to reach Portsmouth. The journey takes about 7 hours 17 minutes and with fares starting at just $15, it presents an excellent value for a comfortable ride.

10bus per day
7h 17mAverage Duration
$15Cheapest ticket
4kgCO₂ emissions

Bus Cardiff to Portsmouth: Trip Overview

Average ticket price$27
Average bus trip duration7h 17m
Number of daily buses10
Earliest bus departure3:25am
Distance103 miles (166 km)
Latest bus departure7:58pm

Cardiff to Portsmouth Bus

Busbud helps you find a bus from Cardiff to Portsmouth. Get the best fare and schedule, book a round trip ticket or find buses with WiFi and electrical outlets.

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

Discover how much the bus trip from Cardiff to Portsmouth will cost you. Use our filters and sorting features to find the cheapest bus tickets or luxury buses.

Frequently asked questions for your trip Cardiff - Portsmouth

Find cheapest prices for buses

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

Best price found
10/10
$17
10/11
$16
Today
$32
10/13
$14
10/14
$14
10/15
No data
10/16
No data
10/17
$18
busbud logoThe cheapest trip from Cardiff to Portsmouth was searched and found on Oct 14, 2025 with a price of $14

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

You can expect to pay from $14 to $69 for a bus ticket from Cardiff to Portsmouth based on the last 2 days. You can expect to find the cheapest price for the trip at $14 which is on 2025-10-14.

About Bus Travel

Bus Travel Tips

Make friends with the driver. They usually know a lot about your destination and may even recommend which side of the bus to sit on to get the best views on the road between Cardiff and Portsmouth!

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

Buses have one of the smallest carbon footprints of motorized transport modes. A bus going from Cardiff to Portsmouth will emit less CO2 than a car or an airplane.

Tune out to the fine sounds of your best music playlist on your bus trip from Cardiff to Portsmouth while indulging in miles on end of beautiful scenic views.

Did you know?

Did you know there are on average 4,400 intercity bus departures every day in the US only? This number has been growing for 9 years in a row, yay!

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

It takes 27 hours to go by bus from Lima to Cusco, one of the craziest bus trips on the world. This route is used daily by locals and backpackers.

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

busbud logoThe bus is the cheapest travel choice for this destination

Will you be returning to Cardiff by bus?

Bus from Portsmouth to Cardiff

You can also go to Portsmouth by train

Train from Cardiff to Portsmouth

Why choose Busbud?

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