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Cheap flights from London Heathrow Airport to Cardiff from £94

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 17/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from London Heathrow Airport to Cardiff

Cheap return flights

Logo
07:40 - 15:55LHR-CWL
8h 15m1 stop
Logo
16:20 - 20:20CWL-LHR
4h 00m1 stop
£174
Find Deal
Tue, 16 Sep - Tue, 23 Sep
Logo
21:10 - 10:35LHR-CWL
13h 25m1 stop
Logo
16:20 - 20:20CWL-LHR
4h 00m1 stop
£193
Find Deal
Sat, 13 Sep - Tue, 16 Sep
Logo
11:05 - 10:35LHR-CWL
23h 30m2 stops
Logo
16:20 - 20:20CWL-LHR
4h 00m1 stop
£201
Find Deal
Sat, 13 Sep - Tue, 16 Sep
KLM Logo
08:40 - 16:45LHR-CWL
8h 05m1 stop
KLM Logo
17:15 - 20:55CWL-LHR
3h 40m1 stop
£217KLM
Find Deal
Fri, 10 Oct - Mon, 13 Oct
KLM Logo
09:55 - 16:45LHR-CWL
6h 50m1 stop
KLM Logo
17:15 - 20:55CWL-LHR
3h 40m1 stop
£221KLM
Find Deal
Thu, 25 Sep - Thu, 2 Oct
KLM Logo
20:55 - 09:15LHR-CWL
12h 20m1 stop
KLM Logo
09:50 - 19:25CWL-LHR
9h 35m1 stop
£255KLM
Find Deal
Wed, 3 Sep - Wed, 10 Sep
KLM Logo
11:45 - 16:45LHR-CWL
5h 00m1 stop
KLM Logo
09:50 - 13:50CWL-LHR
4h 00m1 stop
£259KLM
Find Deal
Wed, 17 Sep - Wed, 24 Sep
British Airways Logo
07:30 - 11:30LHR-CWL
4h 00m1 stop
British Airways Logo
12:00 - 17:45CWL-LHR
5h 45m1 stop
£385British Airways
Find Deal
Tue, 2 Sep - Tue, 9 Sep
British Airways Logo
07:40 - 11:30LHR-CWL
3h 50m1 stop
British Airways Logo
09:00 - 15:20CWL-LHR
6h 20m1 stop
£464British Airways
Find Deal
Wed, 24 Sep - Fri, 26 Sep
British Airways Logo
21:35 - 11:30LHR-CWL
13h 55m2 stops
British Airways Logo
12:00 - 20:50CWL-LHR
8h 50m2 stops
£660British Airways
Find Deal
Wed, 3 Sep - Wed, 10 Sep

KLM flights from London Heathrow Airport to Cardiff

Our best KLM deals on London Heathrow Airport to Cardiff flight tickets
KLM
10 Oct
LHR08:40London Heathrow
8h 05m
1 stop
CWL16:45Cardiff Wales
13 Oct
CWL17:15Cardiff Wales
3h 40m
1 stop
LHR20:55London Heathrow
£217
Find similar
KLM
25 Sept
LHR09:55London Heathrow
6h 50m
1 stop
CWL16:45Cardiff Wales
2 Oct
CWL17:15Cardiff Wales
3h 40m
1 stop
LHR20:55London Heathrow
£221
Find similar
KLM
3 Sept
LHR20:55London Heathrow
12h 20m
1 stop
CWL09:15Cardiff Wales
10 Sept
CWL09:50Cardiff Wales
9h 35m
1 stop
LHR19:25London Heathrow
£255
Find similar

British Airways flights from London Heathrow Airport to Cardiff

Our best British Airways deals on London Heathrow Airport to Cardiff flight tickets
British Airways
2 Sept
LHR07:30London Heathrow
4h 00m
1 stop
CWL11:30Cardiff Wales
9 Sept
CWL12:00Cardiff Wales
5h 45m
1 stop
LHR17:45London Heathrow
£385
Find similar
British Airways
24 Sept
LHR07:40London Heathrow
3h 50m
1 stop
CWL11:30Cardiff Wales
26 Sept
CWL09:00Cardiff Wales
6h 20m
1 stop
LHR15:20London Heathrow
£464
Find similar
British Airways
3 Sept
LHR21:35London Heathrow
13h 55m
2 stops
CWL11:30Cardiff Wales
10 Sept
CWL12:00Cardiff Wales
8h 50m
2 stops
LHR20:50London Heathrow
£660
Find similar

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 5 August 2025.
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

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Tue 16/9

07:40-15:55

1 stop8h 15m

Cardiff Wales

Tue 23/9

16:20-20:20

1 stop4h 00m

£174

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Sat 13/9

21:10-10:35

1 stop13h 25m

Cardiff Wales

Tue 16/9

16:20-20:20

1 stop4h 00m

£193

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Sat 13/9

11:05-10:35

2 stops23h 30m

Cardiff Wales

Tue 16/9

16:20-20:20

1 stop4h 00m

£201

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Fri 10/10

08:40-16:45

1 stop8h 05m

Cardiff Wales

Mon 13/10

17:15-20:55

1 stop3h 40m

£217

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Thu 25/9

09:55-16:45

1 stop6h 50m

Cardiff Wales

Thu 2/10

17:15-20:55

1 stop3h 40m

£221

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Wed 3/9

20:55-09:15

1 stop12h 20m

Cardiff Wales

Wed 10/9

09:50-19:25

1 stop9h 35m

£255

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Wed 17/9

11:45-16:45

1 stop5h 00m

Cardiff Wales

Wed 24/9

09:50-13:50

1 stop4h 00m

£259

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Tue 2/9

07:30-11:30

1 stop4h 00m

Cardiff Wales

Tue 9/9

12:00-17:45

1 stop5h 45m

£385

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Wed 24/9

07:40-11:30

1 stop3h 50m

Cardiff Wales

Fri 26/9

09:00-15:20

1 stop6h 20m

£464

LondonCardiff

LHR - CWL

LHRCWL

London Heathrow

Wed 3/9

21:35-11:30

2 stops13h 55m

Cardiff Wales

Wed 10/9

12:00-20:50

2 stops8h 50m

£660

Flights are sorted by cheapest return flights first.

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

See travel insights to Cardiff from

How to get the cheapest flight ticket from London Heathrow Airport to Cardiff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Cardiff?

The month of December is, on average, the cheapest month to fly to Cardiff from London Heathrow Airport, with most prices found around £230. If you are unable to visit Cardiff during the month of December, then departing from London Heathrow Airport during the month August is also very affordable. Most momondo users find prices during this month for around £288.

What is the cheapest day to depart on your flight to Cardiff?

The cheapest day to depart from London Heathrow Airport to Cardiff is on a Tuesday. Travellers who choose to depart for Cardiff on a Tuesday will often find tickets for as low as £260. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Cardiff for around £333.

What is the cheapest time of day to depart on your flight to Cardiff?

The cheapest time of day to fly to Cardiff is at midday when flights can be purchased for as low as £137. In the afternoon is when there is more demand to fly to Cardiff, so prices are often more expensive at around £314 per ticket.

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

Best price found

£94

Fastest flight time

3h 30m

Direct flights

None

Airports in Cardiff

1 airport
The best one-way flight to Cardiff from London Heathrow Airport in the past 72 hours is £94. The best return flight deal from London Heathrow Airport to Cardiff found on momondo in the last 72 hours is £174.
The fastest flight from London Heathrow Airport to Cardiff takes 3h 30m
There are no direct flights from London Heathrow Airport to Cardiff. Popular non-direct route for this connection is London Heathrow Airport - Cardiff Wales Airport.
There is 1 airport near Cardiff: Cardiff Wales (CWL)
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 3h 30m 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 £198Free CancellationRating
7.8
1,381 reviews
Search KLM flights

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.

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Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport