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Cheap flights from London Heathrow Airport to Cardiff from £75

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Cardiff departing on 27/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from London Heathrow Airport to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
22:10 - 08:05
CWL
-
LHR
9h 55m
1 stop
£155Multiple Airlines
Mon, 13 Apr - Mon, 27 Apr
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
22:10 - 08:05
CWL
-
LHR
9h 55m
1 stop
£158Multiple Airlines
Mon, 13 Apr - Mon, 27 Apr
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
22:10 - 08:05
CWL
-
LHR
9h 55m
1 stop
£160Multiple Airlines
Mon, 13 Apr - Mon, 20 Apr
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
22:10 - 10:20
CWL
-
LHR
12h 10m
1 stop
£163Multiple Airlines
Mon, 13 Apr - Mon, 20 Apr
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
23:50 - 09:05
CWL
-
LHR
9h 15m
1 stop
£164Multiple Airlines
Mon, 20 Apr - Wed, 29 Apr
Multiple Airlines Logo
15:50 - 22:25
LHR
-
CWL
6h 35m
1 stop
Multiple Airlines Logo
22:50 - 08:05
CWL
-
LHR
9h 15m
1 stop
£165Multiple Airlines
Thu, 16 Apr - Thu, 23 Apr
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
07:30 - 17:20
CWL
-
LHR
9h 50m
1 stop
£167Multiple Airlines
Mon, 13 Apr - Sat, 18 Apr
Multiple Airlines Logo
15:50 - 22:50
LHR
-
CWL
7h 00m
1 stop
Multiple Airlines Logo
23:15 - 08:05
CWL
-
LHR
8h 50m
1 stop
£171Multiple Airlines
Tue, 28 Apr - Tue, 5 May
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
Multiple Airlines Logo
23:50 - 09:05
CWL
-
LHR
9h 15m
1 stop
£172Multiple Airlines
Mon, 20 Apr - Wed, 29 Apr
Multiple Airlines Logo
21:10 - 06:55
LHR
-
CWL
9h 45m
1 stop
Multiple Airlines Logo
22:45 - 08:05
CWL
-
LHR
9h 20m
1 stop
£179Multiple Airlines
Fri, 10 Apr - Fri, 17 Apr

KLM flights from London Heathrow Airport to Cardiff

Our best KLM deals on London Heathrow Airport to Cardiff flight tickets
KLM
17 Jun
LHR19:15London Heathrow
14h 00m
1 stop
CWL09:15Cardiff Wales
20 Jun
CWL17:35Cardiff Wales
14h 05m
1 stop
LHR07:40London Heathrow
£257
KLM
19 Jun
LHR08:40London Heathrow
8h 05m
1 stop
CWL16:45Cardiff Wales
20 Jun
CWL09:45Cardiff Wales
6h 30m
1 stop
LHR16:15London Heathrow
£259
KLM
14 Jul
LHR06:30London Heathrow
10h 15m
1 stop
CWL16:45Cardiff Wales
17 Jul
CWL17:15Cardiff Wales
3h 40m
1 stop
LHR20:55London Heathrow
£283

British Airways flights from London Heathrow Airport to Cardiff

Our best British Airways deals on London Heathrow Airport to Cardiff flight tickets
British Airways
27 Mar
LHR19:00London Heathrow
16h 30m
1 stop
CWL11:30Cardiff Wales
30 Mar
CWL12:00Cardiff Wales
7h 50m
1 stop
LHR19:50London Heathrow
£524
British Airways
27 Mar
LHR19:00London Heathrow
16h 30m
1 stop
CWL11:30Cardiff Wales
30 Mar
CWL12:00Cardiff Wales
7h 50m
1 stop
LHR19:50London Heathrow
£542
British Airways
27 Mar
LHR19:00London Heathrow
16h 30m
1 stop
CWL11:30Cardiff Wales
30 Mar
CWL12:00Cardiff Wales
7h 50m
1 stop
LHR19:50London Heathrow
£593

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 18 March 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 13/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Mon 27/4

22:10-08:05

1 stop9h 55m

£155

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 13/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Mon 27/4

22:10-08:05

1 stop9h 55m

£158

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 13/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Mon 20/4

22:10-08:05

1 stop9h 55m

£160

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 13/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Mon 20/4

22:10-10:20

1 stop12h 10m

£163
Fastest return journey

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 20/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Wed 29/4

23:50-09:05

1 stop9h 15m

£164

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Thu 16/4

15:50-22:25

1 stop6h 35m

Cardiff Wales

Thu 23/4

22:50-08:05

1 stop9h 15m

£165

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 13/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Sat 18/4

07:30-17:20

1 stop9h 50m

£167

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Tue 28/4

15:50-22:50

1 stop7h 00m

Cardiff Wales

Tue 5/5

23:15-08:05

1 stop8h 50m

£171

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Mon 20/4

15:50-21:45

1 stop5h 55m

Cardiff Wales

Wed 29/4

23:50-09:05

1 stop9h 15m

£172

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Fri 10/4

21:10-06:55

1 stop9h 45m

Cardiff Wales

Fri 17/4

22:45-08:05

1 stop9h 20m

£179

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

When to book flights from London Heathrow Airport to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Cardiff according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Cardiff (LHR to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Cardiff

Fastest flight time

4h 00m

Direct flights

None
The fastest flight from London Heathrow Airport to Cardiff takes 4h 00m
There are no direct flights from London Heathrow Airport to Cardiff. There are no popular flight routes from London Heathrow Airport to Cardiff.
Search flight deals

  • How far is London Heathrow to Cardiff Wales by plane?

    London Heathrow and Cardiff Wales are 117.1 mi apart from one another. Typically, this will take 4h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from London Heathrow Airport to Cardiff Wales Airport?

    Prices for flights from London Heathrow Airport to Cardiff Wales Airport refresh daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Cardiff Wales Airport?

  • How old do you have to be to fly from London Heathrow Airport to Cardiff Wales Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The necessary travel and health documents for your Cardiff Wales Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from London Heathrow Airport to Cardiff?

Best airlines flying from London Heathrow Airport to Cardiff

Compare and see reviews for airlines that fly from London Heathrow Airport to Cardiff with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £259Free CancellationRating
7.8
1,471 reviews
Search KLM flights

  • How do I get Price Alerts for flights from London Heathrow Airport to Cardiff?

    Price Alerts will notify you by email when the price for flights to Cardiff from London Heathrow Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from London Heathrow Airport to Cardiff with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Travelling to a place near Cardiff?

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

Why use momondo?

Why should I use momondo to find a flight deal from London to Cardiff?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Cardiff . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Cardiff with flexible booking policies on momondo?

momondo does allow users to show only those flights to Cardiff from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Cardiff?

Once all potential London to Cardiff flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to Cardiff right now. Can momondo alert me if prices change?

Yes. momondo can track prices for London to Cardiff flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Cardiff trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport