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Cheap flights from Cardiff to London from £79

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 5/8. 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
1 adult, Economy, 0 bags
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Find the cheapest flights from Cardiff to London

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
23:15 - 08:05
CWL
-
LHR
8h 50m
1 stop
Multiple Airlines Logo
15:10 - 22:50
LHR
-
CWL
7h 40m
1 stop
£143Multiple Airlines
Wed, 19 Aug - Wed, 26 Aug
Multiple Airlines Logo
23:15 - 09:05
CWL
-
LHR
9h 50m
1 stop
Multiple Airlines Logo
15:50 - 22:50
LHR
-
CWL
7h 00m
1 stop
£154Multiple Airlines
Tue, 4 Aug - Tue, 11 Aug
Multiple Airlines Logo
23:15 - 08:05
CWL
-
LHR
8h 50m
1 stop
Multiple Airlines Logo
15:50 - 22:50
LHR
-
CWL
7h 00m
1 stop
£155Multiple Airlines
Tue, 18 Aug - Tue, 25 Aug
Multiple Airlines Logo
22:10 - 08:05
CWL
-
LHR
9h 55m
1 stop
Multiple Airlines Logo
07:40 - 21:45
LHR
-
CWL
14h 05m
1 stop
£156Multiple Airlines
Mon, 10 Aug - Mon, 17 Aug
Multiple Airlines Logo
23:15 - 09:05
CWL
-
LHR
9h 50m
1 stop
Multiple Airlines Logo
15:50 - 22:50
LHR
-
CWL
7h 00m
1 stop
£156Multiple Airlines
Tue, 4 Aug - Tue, 11 Aug
Multiple Airlines Logo
23:15 - 09:05
CWL
-
LHR
9h 50m
1 stop
Multiple Airlines Logo
14:20 - 22:50
LHR
-
CWL
8h 30m
1 stop
£157Multiple Airlines
Wed, 19 Aug - Wed, 26 Aug
Multiple Airlines Logo
22:45 - 08:05
CWL
-
LHR
9h 20m
1 stop
Multiple Airlines Logo
16:50 - 22:50
LHR
-
CWL
6h 00m
1 stop
£161Multiple Airlines
Fri, 14 Aug - Tue, 18 Aug
Multiple Airlines Logo
22:45 - 08:05
CWL
-
LHR
9h 20m
1 stop
Multiple Airlines Logo
15:50 - 21:45
LHR
-
CWL
5h 55m
1 stop
£162Multiple Airlines
Fri, 21 Aug - Mon, 24 Aug
Multiple Airlines Logo
23:15 - 09:05
CWL
-
LHR
9h 50m
1 stop
Multiple Airlines Logo
18:10 - 22:50
LHR
-
CWL
4h 40m
1 stop
£163Multiple Airlines
Wed, 19 Aug - Wed, 26 Aug
Multiple Airlines Logo
22:45 - 09:05
CWL
-
LHR
10h 20m
1 stop
Multiple Airlines Logo
21:10 - 06:55
LHR
-
CWL
9h 45m
1 stop
£174Multiple Airlines
Fri, 7 Aug - Fri, 14 Aug

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KLM flights from Cardiff to London Heathrow Airport

Our best KLM deals on Cardiff to London Heathrow Airport flight tickets
KLM
9 Oct
CWL17:15Cardiff Wales
3h 40m
1 stop
LHR20:55London Heathrow
11 Oct
LHR06:30London Heathrow
10h 15m
1 stop
CWL16:45Cardiff Wales
£257
KLM
24 Sept
CWL17:15Cardiff Wales
3h 40m
1 stop
LHR20:55London Heathrow
26 Sept
LHR06:30London Heathrow
10h 35m
1 stop
CWL17:05Cardiff Wales
£269
KLM
6 Aug
CWL17:15Cardiff Wales
3h 40m
1 stop
LHR20:55London Heathrow
13 Aug
LHR06:30London Heathrow
10h 15m
1 stop
CWL16:45Cardiff Wales
£343

Air France flights from Cardiff to London Heathrow Airport

Our best Air France deals on Cardiff to London Heathrow Airport flight tickets
Air France
19 Aug
CWL09:45Cardiff Wales
8h 50m
2 stops
LHR18:35London Heathrow
26 Aug
LHR19:45London Heathrow
21h 00m
2 stops
CWL16:45Cardiff Wales
£441
Air France
19 Aug
CWL09:45Cardiff Wales
8h 50m
2 stops
LHR18:35London Heathrow
26 Aug
LHR19:45London Heathrow
21h 00m
2 stops
CWL16:45Cardiff Wales
£447
Air France
19 Aug
CWL09:45Cardiff Wales
11h 40m
2 stops
LHR21:25London Heathrow
26 Aug
LHR19:45London Heathrow
21h 00m
2 stops
CWL16:45Cardiff Wales
£465

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 July 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

Cheapest return flight

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 19/8

23:15-08:05

1 stop8h 50m

London Heathrow

Wed 26/8

15:10-22:50

1 stop7h 40m

£143

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 4/8

23:15-09:05

1 stop9h 50m

London Heathrow

Tue 11/8

15:50-22:50

1 stop7h 00m

£154

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 18/8

23:15-08:05

1 stop8h 50m

London Heathrow

Tue 25/8

15:50-22:50

1 stop7h 00m

£155

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 10/8

22:10-08:05

1 stop9h 55m

London Heathrow

Mon 17/8

07:40-21:45

1 stop14h 05m

£156

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 4/8

23:15-09:05

1 stop9h 50m

London Heathrow

Tue 11/8

15:50-22:50

1 stop7h 00m

£156

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 19/8

23:15-09:05

1 stop9h 50m

London Heathrow

Wed 26/8

14:20-22:50

1 stop8h 30m

£157

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 14/8

22:45-08:05

1 stop9h 20m

London Heathrow

Tue 18/8

16:50-22:50

1 stop6h 00m

£161

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 21/8

22:45-08:05

1 stop9h 20m

London Heathrow

Mon 24/8

15:50-21:45

1 stop5h 55m

£162
Fastest return journey

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 19/8

23:15-09:05

1 stop9h 50m

London Heathrow

Wed 26/8

18:10-22:50

1 stop4h 40m

£163

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 7/8

22:45-09:05

1 stop10h 20m

London Heathrow

Fri 14/8

21:10-06:55

1 stop9h 45m

£174

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 £540. 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 £1,270.

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 £538. 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 £880 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 to London Heathrow Airport flights?

There is only 1 cabin class available to choose from on Cardiff to London Heathrow Airport 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

Fastest flight time

3h 40m

Direct flights

None
The fastest flight from Cardiff to London Heathrow Airport takes 3h 40m
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

Frequently asked questions about flying from Cardiff to London Heathrow Airport

  • 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 40m 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
Wembley
Gatwick
Milton Keynes
Luton
Stratford-upon-Avon
Southend-on-Sea
Slough
Northampton
Maidstone
Ipswich
Swindon
Ilford
Folkestone
Canterbury
Poole
Guildford
Hayes
Hastings
Chichester

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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