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Cheap flights from Cardiff to London Heathrow Airport from £73

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — LHR
2 May — 9 May1
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 April 2026.

Mon 27/422:10
CWL
-
LHR
1 stop14h 30m
Multiple Airlines
Wed 29/414:20
LHR
-
CWL
1 stop9h 05m
Multiple Airlines
Deal found 29/3£144
Tue 28/423:15
CWL
-
LHR
1 stop11h 05m
Multiple Airlines
Wed 6/512:00
LHR
-
CWL
1 stop11h 05m
Multiple Airlines
Deal found 29/3£152
Tue 21/423:15
CWL
-
LHR
1 stop11h 55m
Multiple Airlines
Wed 22/415:50
LHR
-
CWL
1 stop7h 35m
Multiple Airlines
Deal found 29/3£156
Wed 29/423:50
CWL
-
LHR
1 stop9h 15m
Multiple Airlines
Wed 6/514:20
LHR
-
CWL
1 stop8h 45m
Multiple Airlines
Deal found 30/3£165
Mon 13/422:10
CWL
-
LHR
1 stop14h 30m
Multiple Airlines
Fri 17/421:10
LHR
-
CWL
1 stop9h 45m
Multiple Airlines
Deal found 29/3£177
Thu 16/416:20
CWL
-
LHR
2 stops16h 50m
Multiple Airlines
Mon 20/416:50
LHR
-
CWL
1 stop4h 55m
Multiple Airlines
Deal found 1/4£178
Thu 14/522:50
CWL
-
LHR
1 stop9h 15m
Multiple Airlines
Thu 21/508:50
LHR
-
CWL
1 stop13h 35m
Multiple Airlines
Deal found 30/3£186
Mon 3/822:10
CWL
-
LHR
1 stop12h 10m
Multiple Airlines
Tue 11/812:00
LHR
-
CWL
1 stop10h 50m
Multiple Airlines
Deal found 29/3£187
Tue 19/523:15
CWL
-
LHR
1 stop8h 50m
Multiple Airlines
Fri 22/521:10
LHR
-
CWL
1 stop9h 45m
Multiple Airlines
Deal found 1/4£198
Fri 15/522:45
CWL
-
LHR
1 stop9h 20m
Multiple Airlines
Fri 22/519:35
LHR
-
CWL
1 stop11h 20m
Multiple Airlines
Deal found 31/3£204
Sun 26/421:45
CWL
-
LHR
1 stop10h 20m
Multiple Airlines
Sun 3/515:50
LHR
-
CWL
1 stop5h 30m
Multiple Airlines
Deal found 29/3£209
Fri 1/522:45
CWL
-
LHR
1 stop9h 20m
Multiple Airlines
Fri 8/521:10
LHR
-
CWL
1 stop9h 45m
Multiple Airlines
Deal found 1/4£211

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 April 2026.

Round-trip from

£144

One-way from

£73
27/4-29/4
  • 27/4-29/4
  • 2 total stops
  • 23h 35m total
  • Cardiff to London
Search Deals
5/5
  • 5/5
  • 1 total stop
  • 11h 05m total
  • Cardiff to London
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 April 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

Mon 27/4

22:10-12:40

1 stop14h 30m

London Heathrow

Wed 29/4

14:20-23:25

1 stop9h 05m

£144

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 29/4

23:50-09:05

1 stop9h 15m

London Heathrow

Wed 6/5

14:20-23:05

1 stop8h 45m

£165

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 16/4

22:50-08:05

1 stop9h 15m

London Heathrow

Mon 20/4

16:50-21:45

1 stop4h 55m

£178

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 14/5

22:50-08:05

1 stop9h 15m

London Heathrow

Thu 21/5

08:50-22:25

1 stop13h 35m

£186

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 15/5

22:45-08:05

1 stop9h 20m

London Heathrow

Fri 22/5

19:35-06:55

1 stop11h 20m

£204

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 1/5

22:45-08:05

1 stop9h 20m

London Heathrow

Fri 8/5

21:10-06:55

1 stop9h 45m

£211

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 13/5

23:30-08:05

1 stop8h 35m

London Heathrow

Wed 20/5

18:10-23:05

1 stop4h 55m

£214

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 14/4

23:15-09:05

1 stop9h 50m

London Heathrow

Sat 18/4

09:55-08:55

3 stops23h 00m

£246

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 24/4

17:45-12:45

2 stops19h 00m

London Heathrow

Sat 25/4

19:50-17:15

2 stops21h 25m

£302

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 2/5

17:35-07:40

1 stop14h 05m

London Heathrow

Sat 9/5

06:30-17:05

1 stop10h 35m

£321

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Showing 1-10 of 18 resultsSorted by cheapest first
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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 £212). Flying from Cardiff to London Heathrow Airport in May is currently the most expensive (average of £427). 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 April 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.

  • 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 £212). Flying from Cardiff to London Heathrow Airport in May is currently the most expensive (average of £427). 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
Wembley
Croydon
Northampton
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Bedford
Chelmsford

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How does Cheapflights help users find flights from Cardiff to Heathrow?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Cardiff today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Cardiff to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Cardiff by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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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