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Cheap flights from Cardiff to London from £97

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 15/12. 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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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
22:00 - 09:05CWL-LHR
11h 05m1 stop
Multiple Airlines Logo
20:45 - 07:00LHR-CWL
10h 15m1 stop
£193Multiple Airlines
Find Deal
Tue, 23 Dec - Tue, 30 Dec
Multiple Airlines Logo
10:30 - 15:35CWL-LHR
5h 05m1 stop
Multiple Airlines Logo
20:45 - 10:05LHR-CWL
13h 20m1 stop
£215Multiple Airlines
Find Deal
Thu, 11 Dec - Wed, 17 Dec
Multiple Airlines Logo
22:25 - 08:05CWL-LHR
9h 40m1 stop
Multiple Airlines Logo
18:50 - 15:30LHR-CWL
20h 40m2 stops
£215Multiple Airlines
Find Deal
Fri, 21 Nov - Tue, 25 Nov
Multiple Airlines Logo
10:30 - 15:35CWL-LHR
5h 05m1 stop
Multiple Airlines Logo
17:45 - 23:05LHR-CWL
5h 20m1 stop
£222Multiple Airlines
Find Deal
Thu, 20 Nov - Mon, 24 Nov
Multiple Airlines Logo
22:25 - 08:05CWL-LHR
9h 40m1 stop
Multiple Airlines Logo
17:45 - 23:05LHR-CWL
5h 20m1 stop
£231Multiple Airlines
Find Deal
Fri, 21 Nov - Mon, 8 Dec
KLM Logo
10:20 - 17:00CWL-LHR
6h 40m1 stop
KLM Logo
06:30 - 16:55LHR-CWL
10h 25m1 stop
£328KLM
Find Deal
Thu, 4 Dec - Thu, 11 Dec
British Airways Logo
12:00 - 19:50CWL-LHR
7h 50m1 stop
British Airways Logo
07:30 - 11:30LHR-CWL
4h 00m1 stop
£391British Airways
Find Deal
Mon, 30 Mar - Tue, 31 Mar
British Airways Logo
12:00 - 19:50CWL-LHR
7h 50m1 stop
British Airways Logo
07:30 - 11:30LHR-CWL
4h 00m1 stop
£392British Airways
Find Deal
Mon, 30 Mar - Tue, 31 Mar
British Airways Logo
12:00 - 16:45CWL-LHR
4h 45m1 stop
British Airways Logo
07:30 - 11:30LHR-CWL
4h 00m1 stop
£393British Airways
Find Deal
Mon, 30 Mar - Tue, 31 Mar
KLM Logo
10:20 - 19:15CWL-LHR
8h 55m1 stop
KLM Logo
08:40 - 16:55LHR-CWL
8h 15m1 stop
£396KLM
Find Deal
Tue, 23 Dec - Tue, 30 Dec

British Airways flights from Cardiff to London Heathrow Airport

Our best British Airways deals on Cardiff to London Heathrow Airport flight tickets
British Airways
30 Mar
CWL12:00Cardiff Wales
7h 50m
1 stop
LHR19:50London Heathrow
31 Mar
LHR07:30London Heathrow
4h 00m
1 stop
CWL11:30Cardiff Wales
£391
Find similar
British Airways
30 Mar
CWL12:00Cardiff Wales
7h 50m
1 stop
LHR19:50London Heathrow
31 Mar
LHR07:30London Heathrow
4h 00m
1 stop
CWL11:30Cardiff Wales
£392
Find similar
British Airways
30 Mar
CWL12:00Cardiff Wales
4h 45m
1 stop
LHR16:45London Heathrow
31 Mar
LHR07:30London Heathrow
4h 00m
1 stop
CWL11:30Cardiff Wales
£393
Find similar

KLM flights from Cardiff to London Heathrow Airport

Our best KLM deals on Cardiff to London Heathrow Airport flight tickets
KLM
4 Dec
CWL10:20Cardiff Wales
6h 40m
1 stop
LHR17:00London Heathrow
11 Dec
LHR06:30London Heathrow
10h 25m
1 stop
CWL16:55Cardiff Wales
£328
Find similar
KLM
23 Dec
CWL10:20Cardiff Wales
8h 55m
1 stop
LHR19:15London Heathrow
30 Dec
LHR08:40London Heathrow
8h 15m
1 stop
CWL16:55Cardiff Wales
£396
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 7 November 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 23/12

22:00-09:05

1 stop11h 05m

London Heathrow

Tue 30/12

20:45-07:00

1 stop10h 15m

£193

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 11/12

10:30-15:35

1 stop5h 05m

London Heathrow

Wed 17/12

20:45-10:05

1 stop13h 20m

£215

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 21/11

22:25-08:05

1 stop9h 40m

London Heathrow

Tue 25/11

18:50-15:30

2 stops20h 40m

£215

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 20/11

10:30-15:35

1 stop5h 05m

London Heathrow

Mon 24/11

17:45-23:05

1 stop5h 20m

£222

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 21/11

22:25-08:05

1 stop9h 40m

London Heathrow

Mon 8/12

17:45-23:05

1 stop5h 20m

£231

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 4/12

10:20-17:00

1 stop6h 40m

London Heathrow

Thu 11/12

06:30-16:55

1 stop10h 25m

£328

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 30/3

12:00-19:50

1 stop7h 50m

London Heathrow

Tue 31/3

07:30-11:30

1 stop4h 00m

£391

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 30/3

12:00-19:50

1 stop7h 50m

London Heathrow

Tue 31/3

07:30-11:30

1 stop4h 00m

£392

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 30/3

12:00-16:45

1 stop4h 45m

London Heathrow

Tue 31/3

07:30-11:30

1 stop4h 00m

£393

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 23/12

10:20-19:15

1 stop8h 55m

London Heathrow

Tue 30/12

08:40-16:55

1 stop8h 15m

£396

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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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 £592. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £1,297.

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 £551. 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 £1,006 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

Direct flights

None
There are no direct flights from Cardiff to London Heathrow Airport. There are no popular flight routes from Cardiff to 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 4h 30m 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 £224Free CancellationRating
7.7
1,405 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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