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Cheap flights from London Heathrow Airport to Cardiff from £82

LHR — CWL
20 Sep — 27 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Cardiff

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Cardiff

Wed 16/914:20 -
1 stop9h 05m
Tue 22/923:15 -
1 stop11h 55m
Deal found 17/8£151
Tue 15/915:50 -
1 stop7h 00m
Tue 22/923:15 -
1 stop13h 25m
Deal found 16/8£153
Wed 23/918:10 -
1 stop5h 15m
Sun 27/921:45 -
1 stop13h 25m
Deal found 16/8£154
Fri 25/916:50 -
1 stop5h 30m
Mon 28/922:10 -
1 stop9h 55m
Deal found 17/8£156
Tue 15/915:50 -
1 stop7h 00m
Tue 29/923:15 -
1 stop9h 50m
Deal found 18/8£159
Tue 8/915:50 -
1 stop7h 00m
Thu 10/922:50 -
1 stop9h 15m
Deal found 17/8£162
Wed 16/914:20 -
1 stop9h 05m
Wed 23/923:50 -
1 stop10h 30m
Deal found 17/8£164
Fri 25/915:50 -
1 stop6h 30m
Sun 27/921:45 -
1 stop12h 35m
Deal found 16/8£168

Find flight deals from Heathrow to Cardiff

Round-trip from

£151

One-way from

£82

Popular in

March

Cheapest in

May

Average price

£159
16/9-22/9
  • 16/9-22/9
  • 2 total stops
  • 21h 00m total
  • London to Cardiff
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10/9
  • 10/9
  • 1 total stop
  • 7h 15m total
  • London to Cardiff
Search Deals
Highest demand for flights based on searches. 35% potential increase in price (£88 potential increase over avg. return price).
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Cheapest flight prices on average. 10% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from London Heathrow Airport to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Wed 16/9

14:20-23:25

1 stop9h 05m

Cardiff Wales

Wed 30/9

23:50-09:05

1 stop9h 15m

£162

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Wed 16/9

14:20-23:25

1 stop9h 05m

Cardiff Wales

Wed 23/9

23:50-10:20

1 stop10h 30m

£165

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Thu 17/9

15:10-22:25

1 stop7h 15m

Cardiff Wales

Thu 24/9

22:50-08:05

1 stop9h 15m

£171

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Fri 4/9

21:10-06:55

1 stop9h 45m

Cardiff Wales

Sun 6/9

21:45-08:05

1 stop10h 20m

£181

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Wed 16/9

09:55-08:35

2 stops22h 40m

Cardiff Wales

Tue 22/9

16:15-09:10

2 stops16h 55m

£213

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Sun 4/10

15:30-13:10

2 stops21h 40m

Cardiff Wales

Sun 11/10

21:45-08:05

1 stop10h 20m

£221
Fastest return journey

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Tue 5/1

06:30-09:50

1 stop3h 20m

Cardiff Wales

Tue 12/1

10:20-16:05

1 stop5h 45m

£241

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Sat 19/9

06:30-17:05

1 stop10h 35m

Cardiff Wales

Fri 25/9

17:15-20:55

1 stop3h 40m

£244

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Sat 26/9

06:30-17:05

1 stop10h 35m

Cardiff Wales

Fri 2/10

17:15-20:55

1 stop3h 40m

£247
Cheapest one-way

LondonCardiff

LHR London Heathrow - CWL Cardiff Wales

LHRCWL

London Heathrow

Thu 10/9

15:10-22:25

1 stop7h 15m

£82

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Heathrow with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Cardiff

What is the cheapest time of day to fly from LHR to CWL?

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

Related info for your journey

  • What airport do you fly into for flights to Cardiff from London Heathrow?

    Most people fly into Cardiff Wales (CWL) if they book a flight to Cardiff from London Heathrow. On average, Cardiff Wales has 0 inbound flights from 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 Heathrow to Cardiff that include hotel bookings?

    Yes. In addition to deals on Heathrow to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Cardiff.

  • Can I find deals for business class flights from Heathrow to Cardiff?

    Yes. Cheapflights offers flight deals from Heathrow to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Bridgend
Barry

Browse thousands of different options on Cheapflights for your next trip

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

Deals for Heathrow to Cardiff flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Cardiff by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to Cardiff with no change fees?

Certainly. Search results for flights to Cardiff from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Cardiff become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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