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Cheap flights from Cardiff to London Heathrow Airport from £203

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — LHR
11 Jan — 18 Jan1
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 12 December 2025.

Wed 31/1215:55CWL - LHR
1 stop5h 10mMultiple Airlines
Thu 1/107:50LHR - CWL
1 stop8h 15mMultiple Airlines
Deal found 9/12£209
Sat 27/1220:25CWL - LHR
2 stops18h 20mMultiple Airlines
Wed 31/1207:50LHR - CWL
1 stop7h 40mMultiple Airlines
Deal found 12/12£364
Fri 26/1210:20CWL - LHR
1 stop8h 55mKLM
Tue 30/1208:40LHR - CWL
1 stop8h 15mKLM
Deal found 10/12£394
Fri 26/1210:20CWL - LHR
2 stops9h 30mMultiple Airlines
Tue 30/1220:45LHR - CWL
1 stop10h 15mMultiple Airlines
Deal found 10/12£418
Fri 12/1216:05CWL - LHR
2 stops16h 20mMultiple Airlines
Fri 19/1220:45LHR - CWL
1 stop26h 35mMultiple Airlines
Deal found 11/12£426
Thu 11/1210:30CWL - LHR
1 stop5h 05mMultiple Airlines
Thu 18/1207:50LHR - CWL
1 stop8h 15mMultiple Airlines
Deal found 10/12£427
Sat 27/1210:20CWL - LHR
1 stop10h 30mKLM
Wed 31/1220:25LHR - CWL
1 stop13h 25mKLM
Deal found 12/12£465
Fri 26/1210:20CWL - LHR
1 stop6h 40mKLM
Fri 26/1220:25LHR - CWL
1 stop13h 25mKLM
Deal found 10/12£687

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 12 December 2025.

Round-trip from

£203

Popular in

June

Cheapest in

May

Average price

£264
12/2-15/2
  • 12/2-15/2
  • 2 total stops
  • 14h 00m total
  • Cardiff to London
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 9% potential price decrease (£20 potential savings vs. average return price).
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Average for round-trip flights in December 2025
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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 12 December 2025.
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

Thu 12/2

10:30-17:50

1 stop7h 20m

London Heathrow

Sun 15/2

14:15-20:55

1 stop6h 40m

£203

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 31/12

15:55-21:05

1 stop5h 10m

London Heathrow

Thu 1/1

07:50-16:05

1 stop8h 15m

£209

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 9/1

22:25-20:05

2 stops21h 40m

London Heathrow

Fri 16/1

17:45-22:00

1 stop4h 15m

£217

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 10/1

20:05-08:05

1 stop12h 00m

London Heathrow

Sat 17/1

15:15-19:40

1 stop4h 25m

£227

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 8/1

10:20-20:50

1 stop10h 30m

London Heathrow

Thu 15/1

11:45-09:50

1 stop22h 05m

£281

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 10/1

10:20-17:00

1 stop6h 40m

London Heathrow

Sat 17/1

08:40-16:45

1 stop8h 05m

£281

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 8/1

10:30-16:50

1 stop6h 20m

London Heathrow

Thu 15/1

20:50-15:40

2 stops18h 50m

£310

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 27/12

20:25-14:45

2 stops18h 20m

London Heathrow

Wed 31/12

07:50-15:30

1 stop7h 40m

£364

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 6/2

08:35-20:55

1 stop12h 20m

London Heathrow

Sat 7/3

07:00-11:30

1 stop4h 30m

£373

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 17/12

12:00-17:05

1 stop5h 05m

£314

Flights are sorted by cheapest return flights first.

Deals found on 11/12

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 £211). Flying from Cardiff to London Heathrow Airport in August is currently the most expensive (average of £364). 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 12 December 2025.

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 45% 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 £211). Flying from Cardiff to London Heathrow Airport in August is currently the most expensive (average of £364). 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
Slough
Northampton
Hounslow
Luton
Gatwick
Wembley
Ilford
Brentford
Colchester
Watford
Hayes
Crawley
Winchester
Swindon
Deal
Bedford
Romford
Chichester

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

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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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