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Cheap flights from Cardiff to London Heathrow Airport from £120

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — LHR
18 Mar — 25 Mar1
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 13 March 2025.

Round-trip from

£190

One-way from

£120

Popular in

August

Cheapest in

September

Average price

£258
29/4-30/4
  • 29/4-30/4
  • 2 total stops
  • 14h 15m total
  • Cardiff to London
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4/8
  • 4/8
  • 1 total stop
  • 9h 05m total
  • Cardiff to London
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High demand for flights, 2% potential price rise
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Cheapest flight prices on average. 5% potential price decrease (£17 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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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 13 March 2025.

Tue 29/416:20CWL - LHR
1 stop4h 00mMultiple Airlines
Wed 30/421:10LHR - CWL
1 stop10h 15mMultiple Airlines
Deal found 12/3£190
Sat 26/412:00CWL - LHR
1 stop8h 20mBritish Airways
Sat 3/519:20LHR - CWL
1 stop16h 10mBritish Airways
Deal found 11/3£379
Thu 3/717:15CWL - LHR
1 stop3h 40mKLM
Fri 4/711:45LHR - CWL
1 stop21h 30mKLM
Deal found 12/3£620

Find flights from Cardiff to Heathrow within your budget

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 13 March 2025.

Fly from

Cardiff

Fly to

Heathrow

Route

Depart

Return

Price

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Tue 29/4

16:20-20:20

1 stop4h 00m

London Heathrow

Wed 30/4

21:10-07:25

1 stop10h 15m

£190

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Sat 26/4

12:00-20:20

1 stop8h 20m

London Heathrow

Sat 3/5

19:20-11:30

1 stop16h 10m

£379

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Thu 3/7

17:15-20:55

1 stop3h 40m

London Heathrow

Fri 4/7

11:45-09:15

1 stop21h 30m

£620

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 4/8

13:10-22:15

1 stop9h 05m

£120

CardiffLondon

CWL - LHR

CWLLHR

Cardiff Wales

Mon 7/7

17:15-20:55

1 stop3h 40m

£745

Flights are sorted by cheapest return flights first.

Deals found on 13/3

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.

Travel insights for flights from Cardiff to Heathrow

Get recent, data-driven insights about flights from Cardiff to Heathrow including ideal travel times, pricing trends, and more.

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 13 March 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Cardiff to London Heathrow Airport as you normally would.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 13 March 2025.
KLM
7.8
Good
1,320 reviews
Check prices

Boarding

7.8

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

KLM
7.8
Good
1,320 reviews
KLM
7.8
Good
1,320 reviews
Check prices

Boarding

7.8

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

British Airways
6.6
Okay
6,713 reviews
KLM
7.8
Good
1,320 reviews
Check prices

Boarding

7.8

Overall

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Food

7.3

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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, British Airways (£379), and KLM (£620) offers the cheapest pricing from Cardiff to London Heathrow Airport. Users have found that British Airways is 3% 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
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Slough
Luton
Hayes
Eastbourne
Ilford
Swindon
Northampton
Crawley
Southend-on-Sea
Maidstone
Winchester
Wembley
Ipswich
Southall
Watford

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 13 March 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£226Average£338FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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