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Cheap flights from London Heathrow Airport to Cardiff from £82

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CWL
4 Jan — 11 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Cardiff

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Cardiff
Explore the most affordable flight options available from Heathrow to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Wed 31/1207:50LHR - CWL
1 stop7h 40mMultiple Airlines
Wed 14/115:55CWL - LHR
1 stop3h 55mMultiple Airlines
Deal found 3/12£175
Wed 31/1220:45LHR - CWL
1 stop13h 20mMultiple Airlines
Sat 3/120:05CWL - LHR
1 stop12h 00mMultiple Airlines
Deal found 4/12£184
Mon 15/1212:10LHR - CWL
1 stop10h 55mMultiple Airlines
Wed 24/1207:55CWL - LHR
1 stop8h 55mMultiple Airlines
Deal found 2/12£217
Sun 14/1212:15LHR - CWL
3 stops34h 50mMultiple Airlines
Wed 17/1215:55CWL - LHR
1 stop5h 10mMultiple Airlines
Deal found 3/12£232
Wed 3/1208:50LHR - CWL
1 stop25h 15mMultiple Airlines
Wed 10/1215:55CWL - LHR
1 stop5h 10mMultiple Airlines
Deal found 2/12£246
Wed 17/1206:40LHR - CWL
2 stops8h 50mMultiple Airlines
Sun 21/1221:20CWL - LHR
1 stop11h 45mMultiple Airlines
Deal found 2/12£248
Wed 31/1207:50LHR - CWL
1 stop7h 40mMultiple Airlines
Wed 7/115:55CWL - LHR
1 stop5h 10mMultiple Airlines
Deal found 3/12£280
Tue 9/1216:20LHR - CWL
2 stops21h 05mMultiple Airlines
Fri 12/1222:25CWL - LHR
1 stop9h 40mMultiple Airlines
Deal found 3/12£280

Find flight deals from Heathrow to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Cardiff (CWL). 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 5 December 2025.

Round-trip from

£151

One-way from

£82

Popular in

July

Cheapest in

December

Average price

£199
1/1-8/1
  • 1/1-8/1
  • 2 total stops
  • 15h 35m total
  • London to Cardiff
Search Deals
31/12
  • 31/12
  • 1 total stop
  • 7h 40m total
  • London to Cardiff
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£47 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Cardiff 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 5 December 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Cardiff that are best for you.

Fly from

Heathrow

Fly to

Cardiff

Route

Depart

Return

Price

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Thu 1/1

07:50-16:05

1 stop8h 15m

Cardiff Wales

Thu 8/1

10:30-17:50

1 stop7h 20m

£151

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Thu 1/1

07:50-16:05

1 stop8h 15m

Cardiff Wales

Thu 15/1

10:30-19:50

1 stop9h 20m

£160

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Fri 9/1

07:50-22:00

1 stop14h 10m

Cardiff Wales

Sun 11/1

21:20-11:25

1 stop14h 05m

£161

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Thu 1/1

07:50-16:05

1 stop8h 15m

Cardiff Wales

Mon 5/1

23:30-10:10

1 stop10h 40m

£162

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Sat 3/1

07:50-19:40

1 stop11h 50m

Cardiff Wales

Sat 10/1

20:05-09:05

1 stop13h 00m

£172

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Wed 31/12

07:50-15:30

1 stop7h 40m

Cardiff Wales

Wed 14/1

15:55-19:50

1 stop3h 55m

£175

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Fri 16/1

07:50-22:00

1 stop14h 10m

Cardiff Wales

Fri 23/1

22:25-11:25

1 stop13h 00m

£176

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Wed 31/12

20:45-10:05

1 stop13h 20m

Cardiff Wales

Sat 3/1

20:05-08:05

1 stop12h 00m

£184

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Fri 2/1

07:50-22:00

1 stop14h 10m

Cardiff Wales

Sun 4/1

21:20-09:05

1 stop11h 45m

£184

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Sat 17/1

15:15-19:40

1 stop4h 25m

Cardiff Wales

Sat 24/1

20:05-08:05

1 stop12h 00m

£198

Flights are sorted by cheapest return flights first.

Deals found on 2/12

Showing 1-10 of 19 results
1
2

Best time to book a flight from Heathrow to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Heathrow 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 London Heathrow Airport to Cardiff

What is the cheapest month to book a flight from London Heathrow Airport to Cardiff?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Cardiff (average of £190). Flying from London Heathrow Airport to Cardiff in July is currently the most expensive (average of £441). 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.

What is the cheapest time of day to fly from LHR to CWL?

Find hourly flight availability from Heathrow to Cardiff. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 December 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Cardiff at midday. If you’re flexible enough to do this you can expect to save up to 46% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. 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 Cardiff. Reviews last updated 5 December 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Cardiff, such as KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,430 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,430 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Boarding

7.8

Crew

8.4

Food

7.2

Comfort

7.6

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Related info for your journey

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

  • What airport do you fly into for flights to Cardiff from London Heathrow?

    Most people fly into Cardiff Wales (CWL) if they book a flight to Cardiff from London Heathrow. On average, Cardiff Wales has 0 inbound flights from London Heathrow per day from 1 airline. Cardiff Wales is conveniently located just 9.1 mi from Cardiff’s city center.

  • What is the cheapest airline to fly from London Heathrow Airport to Cardiff round-trip?

    Cheapflights users have booked flights from London Heathrow Airport to Cardiff round-trip from £210. Users have found that KLM is 41% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow to Cardiff 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 London Heathrow Airport to Cardiff?

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Cardiff (average of £190). Flying from London Heathrow Airport to Cardiff in July is currently the most expensive (average of £441). 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

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Heathrow to Cardiff

Discover the top airline that operate flights from Heathrow to Cardiff. 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 5 December 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£210Average£349FlexibilityNo 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 Heathrow to Cardiff?

Deals for Heathrow to Cardiff 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 Heathrow to Cardiff?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Cardiff by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to Cardiff from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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