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Cheap flights from Cardiff to Bilbao from £145

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — BIO
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Cardiff to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 September 2025.

Round-trip from

£145
19/10-21/10
  • 19/10-21/10
  • 3 total stops
  • 27h 05m total
  • Cardiff to Bilbao
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Find flight deals from Cardiff to Bilbao

Cheapest flights from Cardiff to Bilbao
Explore the most affordable flight options available from Cardiff to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Sun 19/1012:45CWL - BIO
2 stops17h 50mMultiple Airlines
Tue 21/1008:25BIO - CWL
1 stop9h 15mMultiple Airlines
Deal found 16/9£145
Fri 3/1020:55CWL - BIO
1 stop13h 30mMultiple Airlines
Tue 7/1017:15BIO - CWL
2 stops39h 10mMultiple Airlines
Deal found 17/9£167

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from Cardiff to Bilbao that are best for you.

Fly from

Cardiff

Fly to

Bilbao

Route

Depart

Return

Price

CardiffBilbao

CWL - BIO

CWLBIO

Cardiff Wales

Sun 19/10

12:45-07:35

2 stops17h 50m

Bilbao

Tue 21/10

08:25-16:40

1 stop9h 15m

£145

CardiffBilbao

CWL - BIO

CWLBIO

Cardiff Wales

Fri 3/10

20:55-11:25

1 stop13h 30m

Bilbao

Tue 7/10

17:15-07:25

2 stops39h 10m

£167

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Best time to book a flight from Cardiff to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Cardiff with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to Bilbao

What is the cheapest month to book a flight from Cardiff to Bilbao?

Currently, January is the cheapest month in which you can book a flight from Cardiff to Bilbao (average of £74). Flying from Cardiff to Bilbao in August is currently the most expensive (average of £223). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated 18 September 2025.
See what other customers who have flown with KLM from Cardiff to Bilbao have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,386 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,386 reviews
KLM
7.8
Good
1,386 reviews
Check prices

Comfort

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
4.0
Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Cardiff to Bilbao round-trip?

    Flying on KLM is currently your cheapest option to Bilbao, with prices starting at £193.

  • Can I find deals for flights from Cardiff to Bilbao that include hotel bookings?

    Yes. In addition to deals on Cardiff to Bilbao flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Bilbao.

  • Can I find deals for business class flights from Cardiff to Bilbao?

    Yes. Cheapflights offers flight deals from Cardiff to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Cardiff to Bilbao?

    Currently, January is the cheapest month in which you can book a flight from Cardiff to Bilbao (average of £74). Flying from Cardiff to Bilbao in August is currently the most expensive (average of £223). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Cardiff to Bilbao

See prices for flight routes from nearby airports that may be better suited for you.
Manchester to Bilbao flights
Bristol to Bilbao flights
Manchester to San Sebastian flights
Bristol to San Sebastian flights

Top airline flying from Cardiff to Bilbao

Discover the top airline that operate flights from Cardiff to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£193Average£364FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Cardiff to Bilbao?

Deals for Cardiff to Bilbao flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Cardiff to Bilbao?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Cardiff to Bilbao.

Can Cheapflights find flights from Cardiff to Bilbao with no change fees?

Need flexible booking options for your flight to Bilbao from Cardiff? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Cardiff to Bilbao become cheaper?

Yes! Start tracking prices for Cardiff to Bilbao flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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