CWL - LHR

£100 Find Cheap Flights from Cardiff to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cardiff to Heathrow departing on 22/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cardiff to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Cardiff to London, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Cardiff to Heathrow (CWL-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Cardiff to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Cardiff to Heathrow

Tue, 22 Jul - Wed, 23 Jul
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16:20 - 10:20CWL-LHR
18h 00m1 stop
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15:50 - 07:25LHR-CWL
15h 35m1 stop
£177
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Sat, 26 Jul - Sat, 2 Aug
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09:00 - 20:20CWL-LHR
11h 20m1 stop
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21:10 - 10:35LHR-CWL
13h 25m1 stop
£195
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Sat, 12 Jul - Sat, 19 Jul
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09:00 - 20:20CWL-LHR
11h 20m1 stop
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20:10 - 10:35LHR-CWL
14h 25m1 stop
£197
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Thu, 10 Jul - Thu, 17 Jul
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07:55 - 18:55CWL-LHR
11h 00m1 stop
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21:10 - 12:00LHR-CWL
14h 50m1 stop
£217
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Sat, 12 Jul - Tue, 15 Jul
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09:00 - 20:20CWL-LHR
11h 20m1 stop
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08:50 - 15:55LHR-CWL
7h 05m1 stop
£219
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Sat, 12 Jul - Tue, 15 Jul
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09:00 - 19:25CWL-LHR
10h 25m1 stop
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08:50 - 15:55LHR-CWL
7h 05m1 stop
£222
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Fri, 1 Aug - Sun, 3 Aug
KLM Logo
17:15 - 20:55CWL-LHR
3h 40m1 stop
KLM Logo
20:55 - 09:15LHR-CWL
12h 20m1 stop
£311KLM
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Fri, 1 Aug - Sun, 3 Aug
British Airways Logo
09:00 - 21:35CWL-LHR
12h 35m2 stops
British Airways Logo
21:45 - 11:30LHR-CWL
13h 45m2 stops
£659British Airways
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Wed, 9 Jul - Fri, 11 Jul
British Airways Logo
12:00 - 07:25CWL-LHR
19h 25m2 stops
British Airways Logo
21:45 - 11:30LHR-CWL
13h 45m2 stops
£667British Airways
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Thu, 26 Jun - Thu, 3 Jul
British Airways Logo
12:00 - 20:40CWL-LHR
8h 40m2 stops
British Airways Logo
12:05 - 08:20LHR-CWL
20h 15m2 stops
£922British Airways
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KAYAK's insights & trends for Cardiff to Heathrow flights

Get data-powered insights and trends into flights from Cardiff to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Cardiff to London Heathrow Airport?

The average price of all round-trip flights from Cardiff to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to London Heathrow Airport on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Cardiff to London Heathrow Airport. For your return ticket, we recommend flying on a Wednesday and avoiding Fridays for the best deals.

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Good to know - Cheap tickets from Cardiff to London Heathrow Airport

Low seasonSeptember
High seasonDecember
Cheapest flight£100
Best time to beat the crowds (38% less expensive on average)
Most popular time to fly (9% more expensive on average)
Flight from Cardiff to London Heathrow Airport

When to book flights from Cardiff to Heathrow

Are your dates flexible? Find out the best times to travel from Cardiff to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Cardiff to London Heathrow Airport flights

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

    In the last 3 days, the lowest price for a flight from Cardiff to London Heathrow Airport was £136 for a one-way ticket and £241 for a return.

  • Which aircraft models fly most regularly from Cardiff to London Heathrow Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Cardiff to London Heathrow Airport?

    oneworld, and SkyTeam are the airline alliances operating flights between Cardiff and London Heathrow Airport, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Cardiff to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Cardiff to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Cardiff to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Cardiff is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Cardiff to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Cardiff with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Cardiff to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Cardiff up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Cardiff to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Cardiff to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Cardiff to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1358 reviews
7.1Entertainment
7.7Comfort
7.2Food
7.8Boarding
8.4Crew
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

Everything you need to know for your flight from Cardiff to Heathrow

Information on your arrival and departure airports

Cardiff (CWL)
Heathrow (LHR)

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