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Cheap flights from Cardiff to London from £85

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 29/3. 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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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
23:30 - 08:05
CWL
-
LHR
8h 35m
1 stop
Multiple Airlines Logo
18:10 - 22:00
LHR
-
CWL
3h 50m
1 stop
£161Multiple Airlines
Pzt, 23 Mar - Pzt, 30 Mar
Multiple Airlines Logo
23:30 - 09:05
CWL
-
LHR
9h 35m
1 stop
Multiple Airlines Logo
18:10 - 22:00
LHR
-
CWL
3h 50m
1 stop
£172Multiple Airlines
Pzt, 23 Mar - Pzt, 30 Mar
Multiple Airlines Logo
23:30 - 08:05
CWL
-
LHR
8h 35m
1 stop
Multiple Airlines Logo
07:50 - 15:30
LHR
-
CWL
7h 40m
1 stop
£177Multiple Airlines
Pzt, 23 Şub - Çar, 25 Şub
Multiple Airlines Logo
23:30 - 08:05
CWL
-
LHR
8h 35m
1 stop
Multiple Airlines Logo
07:50 - 15:30
LHR
-
CWL
7h 40m
1 stop
£178Multiple Airlines
Pzt, 23 Şub - Çar, 25 Şub
Multiple Airlines Logo
15:55 - 19:50
CWL
-
LHR
3h 55m
1 stop
Multiple Airlines Logo
19:35 - 23:25
LHR
-
CWL
3h 50m
1 stop
£184Multiple Airlines
Çar, 25 Mar - Çar, 1 Nis
Multiple Airlines Logo
16:45 - 14:45
CWL
-
LHR
22h 00m
2 stops
Multiple Airlines Logo
18:10 - 22:50
LHR
-
CWL
4h 40m
1 stop
£202Multiple Airlines
Sal, 24 Mar - Sal, 31 Mar
Multiple Airlines Logo
23:30 - 08:05
CWL
-
LHR
8h 35m
1 stop
Multiple Airlines Logo
06:40 - 15:30
LHR
-
CWL
8h 50m
2 stops
£209Multiple Airlines
Pzt, 23 Şub - Çar, 25 Şub
Multiple Airlines Logo
23:30 - 08:05
CWL
-
LHR
8h 35m
1 stop
Multiple Airlines Logo
17:45 - 23:05
LHR
-
CWL
5h 20m
1 stop
£213Multiple Airlines
Pzt, 9 Mar - Pzt, 16 Mar
Multiple Airlines Logo
23:30 - 08:05
CWL
-
LHR
8h 35m
1 stop
Multiple Airlines Logo
16:20 - 22:00
LHR
-
CWL
5h 40m
1 stop
£216Multiple Airlines
Pzt, 23 Şub - Cum, 27 Şub
Multiple Airlines Logo
20:05 - 08:05
CWL
-
LHR
12h 00m
1 stop
Multiple Airlines Logo
07:50 - 15:30
LHR
-
CWL
7h 40m
1 stop
£226Multiple Airlines
Cmt, 21 Şub - Çar, 25 Şub

KLM flights from Cardiff to London Heathrow Airport

Our best KLM deals on Cardiff to London Heathrow Airport flight tickets
KLM
21 Mar
CWL17:25Cardiff Wales
3h 25m
1 stop
LHR20:50London Heathrow
23 Mar
LHR20:25London Heathrow
13h 25m
1 stop
CWL09:50Cardiff Wales
£256
KLM
24 Mar
CWL17:25Cardiff Wales
3h 25m
1 stop
LHR20:50London Heathrow
31 Mar
LHR20:55London Heathrow
12h 20m
1 stop
CWL09:15Cardiff Wales
£271
KLM
10 Mar
CWL10:20Cardiff Wales
10h 30m
1 stop
LHR20:50London Heathrow
17 Mar
LHR11:45London Heathrow
5h 10m
1 stop
CWL16:55Cardiff Wales
£430

British Airways flights from Cardiff to London Heathrow Airport

Our best British Airways deals on Cardiff to London Heathrow Airport flight tickets
British Airways
11 Apr
CWL12:00Cardiff Wales
19h 55m
1 stop
LHR07:55London Heathrow
15 Apr
LHR07:40London Heathrow
3h 50m
1 stop
CWL11:30Cardiff Wales
£377
British Airways
11 Apr
CWL12:00Cardiff Wales
19h 55m
1 stop
LHR07:55London Heathrow
15 Apr
LHR07:40London Heathrow
3h 50m
1 stop
CWL11:30Cardiff Wales
£379
British Airways
21 Mar
CWL12:00Cardiff Wales
8h 40m
2 stops
LHR20:40London Heathrow
23 Mar
LHR06:10London Heathrow
5h 20m
2 stops
CWL11:30Cardiff Wales
£647

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 9 Şubat 2026.
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

Pzt 23/3

23:30-08:05

1 stop8h 35m

London Heathrow

Pzt 30/3

18:10-22:00

1 stop3h 50m

£161

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Pzt 23/3

23:30-09:05

1 stop9h 35m

London Heathrow

Pzt 30/3

18:10-22:00

1 stop3h 50m

£172

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Pzt 23/2

23:30-08:05

1 stop8h 35m

London Heathrow

Çar 25/2

07:50-15:30

1 stop7h 40m

£177

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Pzt 23/2

23:30-08:05

1 stop8h 35m

London Heathrow

Çar 25/2

07:50-15:30

1 stop7h 40m

£178

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Çar 25/3

15:55-19:50

1 stop3h 55m

London Heathrow

Çar 1/4

19:35-23:25

1 stop3h 50m

£184

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sal 24/3

16:45-14:45

2 stops22h 00m

London Heathrow

Sal 31/3

18:10-22:50

1 stop4h 40m

£202

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Pzt 23/2

23:30-08:05

1 stop8h 35m

London Heathrow

Çar 25/2

06:40-15:30

2 stops8h 50m

£209

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Pzt 9/3

23:30-08:05

1 stop8h 35m

London Heathrow

Pzt 16/3

17:45-23:05

1 stop5h 20m

£213

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Pzt 23/2

23:30-08:05

1 stop8h 35m

London Heathrow

Cum 27/2

16:20-22:00

1 stop5h 40m

£216

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Cmt 21/2

20:05-08:05

1 stop12h 00m

London Heathrow

Çar 25/2

07:50-15:30

1 stop7h 40m

£226

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 £569. 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 £892.

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 £530. 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 £864 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

£827

Fastest flight time

3h 25m

Direct flights

None
The best flight deal from Cardiff to London Heathrow Airport found on momondo in the last 72 hours is £827
The fastest flight from Cardiff to London Heathrow Airport takes 3h 25m
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 25m 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 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Northampton
Stratford-upon-Avon
Swindon
Southend-on-Sea
Canterbury
Ipswich
Ilford
Poole
Guildford
Chelmsford
Hayes
Dover
Swanage
Folkestone

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.

An easier way to manage your London Heathrow Airport trip

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