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Cheap flights from Cardiff to London Heathrow Airport from £130

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 24/10. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — LHR
6 Jul — 13 Jul1
1 adult

Cheap 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 1 July 2025.

Round-trip from

£185

One-way from

£130

Popular in

August

Cheapest in

September

Average price

£356
5/8-12/8
  • 5/8-12/8
  • 2 total stops
  • 14h 55m total
  • Cardiff to London
24/10
  • 24/10
  • 1 total stop
  • 7h 55m total
  • Cardiff to London
Highest demand for flights based on searches. 9% potential increase in price (£26 potential increase over avg. return price).
Cheapest flight prices on average. 7% potential price decrease (£18 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Cardiff to Heathrow

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 1 July 2025.

Tue 5/816:20CWL - LHR
1 stop5h 20mMultiple Airlines
Tue 12/806:20LHR - CWL
1 stop9h 35mMultiple Airlines
Deal found 30/6£185
Wed 13/817:15CWL - LHR
1 stop3h 40mKLM
Wed 20/820:55LHR - CWL
1 stop12h 20mKLM
Deal found 29/6£233
Tue 22/712:00CWL - LHR
1 stop5h 45mBritish Airways
Tue 29/707:30LHR - CWL
1 stop4h 00mBritish Airways
Deal found 30/6£425

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 1 July 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

Tue 5/8

16:20-21:40

1 stop5h 20m

London Heathrow

Tue 12/8

06:20-15:55

1 stop9h 35m

£185

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Wed 13/8

17:15-20:55

1 stop3h 40m

London Heathrow

Wed 20/8

20:55-09:15

1 stop12h 20m

£233

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 22/7

12:00-17:45

1 stop5h 45m

London Heathrow

Tue 29/7

07:30-11:30

1 stop4h 00m

£425

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Fri 24/10

12:25-20:20

1 stop7h 55m

£130

Flights are sorted by cheapest return flights first.

Deals found on 29/6

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, January is the cheapest month in which you can book a flight from Cardiff to London Heathrow Airport (average of £112). Flying from Cardiff to London Heathrow Airport in August is currently the most expensive (average of £164). 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 1 July 2025.

A simple way to save on the total cost of your ticket is to fly from Cardiff to London Heathrow Airport at midday. If you’re flexible enough to do this you can expect to save up to 5% on your trip compared to booking a flight in the morning.

How much does it cost for a return flight from Cardiff to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 1 July 2025.
Get a feel of what it's like to fly with KLM and British Airways from Cardiff to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

7.2

Crew

8.4

Entertainment

7.1

Overall

7.8

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Food

7.2

Crew

8.4

Entertainment

7.1

Overall

7.8

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Food

7.2

Crew

8.4

Entertainment

7.1

Overall

7.8

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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 1 airline. Cardiff Wales is conveniently located just 9.1 mi from Cardiff’s city center.

  • What are the cheapest airlines flying from Cardiff to London Heathrow Airport round-trip?

    According to our current data, KLM (£233), and British Airways (£425) offers the cheapest pricing from Cardiff to London Heathrow Airport. Users have found that KLM is 33% cheaper than the other options available to this destination.

  • 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, January is the cheapest month in which you can book a flight from Cardiff to London Heathrow Airport (average of £112). Flying from Cardiff to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Croydon
Milton Keynes
Hounslow
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Watford
Southend-on-Sea
Folkestone
Ipswich
Winchester
Hayes
Maidstone
Swindon

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Cardiff to Heathrow

Discover the top airline that operate flights from Cardiff to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 July 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£219Average£384FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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