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Cheap flights from Cardiff to London from £70

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to London departing on 16/10. 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 Cardiff to London

Cheap return flights

Multiple Airlines Logo
20:20 - 14:45CWL-LHR
18h 25m2 stops
Multiple Airlines Logo
17:45 - 22:00LHR-CWL
4h 15m1 stop
£150Multiple Airlines
Find Deal
Tue, 14 Oct - Fri, 31 Oct
Multiple Airlines Logo
16:20 - 20:20CWL-LHR
4h 00m1 stop
Multiple Airlines Logo
15:10 - 22:00LHR-CWL
6h 50m1 stop
£161Multiple Airlines
Find Deal
Tue, 14 Oct - Fri, 31 Oct
Multiple Airlines Logo
13:10 - 18:55CWL-LHR
5h 45m1 stop
Multiple Airlines Logo
07:40 - 12:45LHR-CWL
5h 05m1 stop
£162Multiple Airlines
Find Deal
Mon, 13 Oct - Mon, 20 Oct
KLM Logo
17:15 - 20:50CWL-LHR
3h 35m1 stop
KLM Logo
08:40 - 16:45LHR-CWL
8h 05m1 stop
£249KLM
Find Deal
Mon, 3 Nov - Mon, 10 Nov
KLM Logo
10:20 - 19:15CWL-LHR
8h 55m1 stop
KLM Logo
11:45 - 16:45LHR-CWL
5h 00m1 stop
£254KLM
Find Deal
Tue, 20 Jan - Fri, 23 Jan
KLM Logo
09:50 - 20:55CWL-LHR
11h 05m1 stop
KLM Logo
20:55 - 09:15LHR-CWL
12h 20m1 stop
£402KLM
Find Deal
Fri, 26 Sep - Sun, 28 Sep
KLM Logo
17:15 - 20:55CWL-LHR
3h 40m1 stop
KLM Logo
08:40 - 16:45LHR-CWL
8h 05m1 stop
£428KLM
Find Deal
Mon, 29 Sep - Thu, 2 Oct
British Airways Logo
12:00 - 19:20CWL-LHR
7h 20m2 stops
British Airways Logo
06:10 - 11:30LHR-CWL
5h 20m2 stops
£604British Airways
Find Deal
Sat, 15 Nov - Mon, 17 Nov
British Airways Logo
12:00 - 07:25CWL-LHR
19h 25m2 stops
British Airways Logo
21:35 - 11:30LHR-CWL
13h 55m2 stops
£661British Airways
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Mon, 13 Oct - Mon, 20 Oct
British Airways Logo
12:00 - 18:55CWL-LHR
6h 55m2 stops
British Airways Logo
14:20 - 11:30LHR-CWL
21h 10m2 stops
£859British Airways
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Tue, 30 Sep - Wed, 1 Oct

KLM flights from Cardiff to London Heathrow Airport

Our best KLM deals on Cardiff to London Heathrow Airport flight tickets
KLM
3 Nov
CWL17:15Cardiff Wales
3h 35m
1 stop
LHR20:50London Heathrow
10 Nov
LHR08:40London Heathrow
8h 05m
1 stop
CWL16:45Cardiff Wales
£249
Find similar
KLM
20 Jan
CWL10:20Cardiff Wales
8h 55m
1 stop
LHR19:15London Heathrow
23 Jan
LHR11:45London Heathrow
5h 00m
1 stop
CWL16:45Cardiff Wales
£254
Find similar
KLM
26 Sept
CWL09:50Cardiff Wales
11h 05m
1 stop
LHR20:55London Heathrow
28 Sept
LHR20:55London Heathrow
12h 20m
1 stop
CWL09:15Cardiff Wales
£402
Find similar

British Airways flights from Cardiff to London Heathrow Airport

Our best British Airways deals on Cardiff to London Heathrow Airport flight tickets
British Airways
15 Nov
CWL12:00Cardiff Wales
7h 20m
2 stops
LHR19:20London Heathrow
17 Nov
LHR06:10London Heathrow
5h 20m
2 stops
CWL11:30Cardiff Wales
£604
Find similar
British Airways
13 Oct
CWL12:00Cardiff Wales
19h 25m
2 stops
LHR07:25London Heathrow
20 Oct
LHR21:35London Heathrow
13h 55m
2 stops
CWL11:30Cardiff Wales
£661
Find similar
British Airways
30 Sept
CWL12:00Cardiff Wales
6h 55m
2 stops
LHR18:55London Heathrow
1 Oct
LHR14:20London Heathrow
21h 10m
2 stops
CWL11:30Cardiff Wales
£859
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to London Heathrow Airport 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 17 September 2025.
Use the filters below to find and compare flights from Cardiff to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 14/10

20:20-14:45

2 stops18h 25m

London Heathrow

Fri 31/10

17:45-22:00

1 stop4h 15m

£150

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 14/10

16:20-20:20

1 stop4h 00m

London Heathrow

Fri 31/10

15:10-22:00

1 stop6h 50m

£161

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 13/10

13:10-18:55

1 stop5h 45m

London Heathrow

Mon 20/10

07:40-12:45

1 stop5h 05m

£162

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 3/11

17:15-20:50

1 stop3h 35m

London Heathrow

Mon 10/11

08:40-16:45

1 stop8h 05m

£249

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 20/1

10:20-19:15

1 stop8h 55m

London Heathrow

Fri 23/1

11:45-16:45

1 stop5h 00m

£254

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 26/9

09:50-20:55

1 stop11h 05m

London Heathrow

Sun 28/9

20:55-09:15

1 stop12h 20m

£402

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 29/9

17:15-20:55

1 stop3h 40m

London Heathrow

Thu 2/10

08:40-16:45

1 stop8h 05m

£428

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 15/11

12:00-19:20

2 stops7h 20m

London Heathrow

Mon 17/11

06:10-11:30

2 stops5h 20m

£604

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 13/10

12:00-07:25

2 stops19h 25m

London Heathrow

Mon 20/10

21:35-11:30

2 stops13h 55m

£661

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 30/9

12:00-18:55

2 stops6h 55m

London Heathrow

Wed 1/10

14:20-11:30

2 stops21h 10m

£859

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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See travel insights to London from

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

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 day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Cardiff is on a Monday. momondo users have found tickets for Monday departures for as low as £627. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £891.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Cardiff to London Heathrow Airport in the morning for as low as £529. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £974 on average. Flights to London Heathrow Airport from Cardiff in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Cardiff Wales to London Heathrow flight route?

Fly from Cardiff Wales to London Heathrow for the best Cardiff Wales - London Heathrow flight prices

What cabin class options are available on Cardiff Wales to London Heathrow flights?

There is only 1 cabin class available to choose from on Cardiff Wales to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

When to book flights from Cardiff to London Heathrow Airport

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

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

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

Best price found

£579

Direct flights

None
The best flight deal from Cardiff to London Heathrow Airport found on momondo in the last 72 hours is £579
There are no direct flights from Cardiff to London Heathrow Airport. Popular non-direct route for this connection is Cardiff Wales Airport - London Heathrow Airport.
Search flight deals

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

    Cardiff Wales and London Heathrow are 117.1 mi apart from one another. Typically, this will take 3h 35m by plane in normal conditions.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cardiff Wales Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow 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 Cardiff to London Heathrow Airport?

Best airlines flying from Cardiff to London Heathrow Airport

Compare and see reviews for airlines that fly from Cardiff to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £216Free CancellationRating
7.8
1,386 reviews
Search KLM flights

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Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Cardiff to London for you.

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Cardiff.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Cardiff and alert you when they change.

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