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Cheap flights from Cardiff to London Heathrow Airport from £90

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/3. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — LHR
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Cardiff to Heathrow
Explore the most affordable flight options available from Cardiff to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 February 2026.

Mon 16/316:40
CWL
-
LHR
2 stops22h 05m
Multiple Airlines
Mon 23/317:45
LHR
-
CWL
1 stop5h 20m
Multiple Airlines
Deal found 30/1£190
Mon 16/223:30
CWL
-
LHR
1 stop8h 35m
Multiple Airlines
Fri 20/217:45
LHR
-
CWL
1 stop4h 15m
Multiple Airlines
Deal found 1/2£197
Sat 14/220:05
CWL
-
LHR
1 stop12h 00m
Multiple Airlines
Wed 18/216:20
LHR
-
CWL
1 stop17h 45m
Multiple Airlines
Deal found 30/1£215
Tue 3/317:25
CWL
-
LHR
1 stop3h 25m
KLM
Tue 10/320:25
LHR
-
CWL
1 stop13h 25m
KLM
Deal found 1/2£271
Tue 3/310:20
CWL
-
LHR
2 stops11h 05m
Multiple Airlines
Tue 10/320:50
LHR
-
CWL
2 stops18h 40m
Multiple Airlines
Deal found 1/2£296
Wed 17/612:00
CWL
-
LHR
1 stop8h 55m
Multiple Airlines
Fri 19/617:20
LHR
-
CWL
1 stop18h 10m
Multiple Airlines
Deal found 31/1£327
Sun 1/321:20
CWL
-
LHR
2 stops13h 25m
Multiple Airlines
Sun 8/307:50
LHR
-
CWL
1 stop4h 10m
Multiple Airlines
Deal found 1/2£329
Tue 31/312:00
CWL
-
LHR
1 stop5h 45m
Multiple Airlines
Thu 2/418:30
LHR
-
CWL
1 stop13h 50m
Multiple Airlines
Deal found 1/2£337
Thu 12/308:35
CWL
-
LHR
1 stop3h 35m
British Airways
Wed 18/317:10
LHR
-
CWL
1 stop14h 55m
British Airways
Deal found 30/1£356
Sat 11/412:00
CWL
-
LHR
1 stop19h 55m
British Airways
Wed 15/407:40
LHR
-
CWL
1 stop3h 50m
British Airways
Deal found 29/1£359

Find flight deals from Cardiff to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 February 2026.

Round-trip from

£197

One-way from

£90

Popular in

June

Cheapest in

May

Average price

£337

Good round-trip deal

£594 or less
16/2-20/2
  • 16/2-20/2
  • 2 total stops
  • 12h 50m total
  • Cardiff to London
Search Deals
29/3
  • 29/3
  • 1 total stop
  • 10h 20m total
  • Cardiff to London
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Cardiff Wales to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 2 February 2026.
Use the filters below to find and compare flights from Cardiff to London Heathrow Airport that are best for you.

Fly from

Cardiff

Fly to

Heathrow

Route

Depart

Return

Price

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 16/3

16:40-14:45

2 stops22h 05m

London Heathrow

Mon 23/3

17:45-23:05

1 stop5h 20m

£190

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 14/2

20:05-08:05

1 stop12h 00m

London Heathrow

Wed 18/2

16:20-10:05

1 stop17h 45m

£215

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 3/3

17:25-20:50

1 stop3h 25m

London Heathrow

Tue 10/3

20:25-09:50

1 stop13h 25m

£271

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 3/3

10:20-21:25

2 stops11h 05m

London Heathrow

Tue 10/3

20:50-15:30

2 stops18h 40m

£296

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 17/6

12:00-20:55

1 stop8h 55m

London Heathrow

Fri 19/6

17:20-11:30

1 stop18h 10m

£327

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sun 1/3

21:20-10:45

2 stops13h 25m

London Heathrow

Sun 8/3

07:50-12:00

1 stop4h 10m

£329

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 31/3

12:00-17:45

1 stop5h 45m

London Heathrow

Thu 2/4

18:30-08:20

1 stop13h 50m

£337

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 12/3

08:35-12:10

1 stop3h 35m

London Heathrow

Sat 21/3

07:00-11:30

1 stop4h 30m

£356

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 12/3

08:35-12:10

1 stop3h 35m

London Heathrow

Wed 18/3

17:10-08:05

1 stop14h 55m

£356

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 12/3

08:35-12:10

1 stop3h 35m

London Heathrow

Sun 22/3

06:50-11:30

1 stop4h 40m

£356

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 15 results
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Best time to book a flight from Cardiff to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Cardiff with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to London Heathrow Airport

What is the cheapest month to book a flight from Cardiff to London Heathrow Airport?

Currently, September is the cheapest month in which you can book a flight from Cardiff to London Heathrow Airport (average of £206). Flying from Cardiff to London Heathrow Airport in August is currently the most expensive (average of £356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CWL to LHR?

Find hourly flight availability from Cardiff to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 2 February 2026.

A simple way to save on the total cost of your ticket is to fly from Cardiff to London Heathrow Airport in the morning. If you’re flexible enough to do this you can expect to save up to 38% on your trip compared to booking a flight in the evening.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Cardiff to London Heathrow?

    Most people fly from Cardiff Wales (CWL) if they book a flight from Cardiff to London Heathrow. On average, Cardiff Wales has 0 outbound flights to London Heathrow per day from 0 airlines. Cardiff Wales is conveniently located just 9.1 mi from Cardiff’s city center.

  • How long is the flight from Cardiff to London Heathrow Airport?

    Departing from Cardiff to London Heathrow Airport will take you 3h 25m. The distance from Cardiff to London Heathrow Airport is about 124 mi.

  • What are the cheapest flights from Cardiff to London Heathrow Airport?

    On average you can expect to pay £823 for a flight from Cardiff to London Heathrow Airport. The cheapest flight overall is £509 while the most popular route, (Cardiff Wales - London Heathrow) is currently priced at £190.

  • Can I find deals for flights from Cardiff to Heathrow that include hotel bookings?

    Yes. In addition to deals on Cardiff to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Heathrow.

  • Can I find deals for business class flights from Cardiff to Heathrow?

    Yes. Cheapflights offers flight deals from Cardiff to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Cardiff to London Heathrow Airport?

    Currently, September is the cheapest month in which you can book a flight from Cardiff to London Heathrow Airport (average of £206). Flying from Cardiff to London Heathrow Airport in August is currently the most expensive (average of £356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

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Can Cheapflights find flights from Cardiff to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Cardiff to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Cardiff to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on Cardiff to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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