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Cheap flights from Klagenfurt to London Heathrow Airport from £139

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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — LHR
26 Dec — 2 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Klagenfurt to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Klagenfurt (KLU) 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 26 November 2025.

Round-trip from

£173

One-way from

£139

Popular in

December

Cheapest in

January

Average price

£278
Austrian Airlines
  • Austrian Airlines
  • 8/1-15/1
  • 2 total stops
  • 11h 10m total
  • Klagenfurt to London
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Austrian Airlines
  • Austrian Airlines
  • 6/2
  • 1 total stop
  • 4h 25m total
  • Klagenfurt to London
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£29 potential increase over avg. return price).
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Cheapest flight prices on average. 6% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Find flight deals from Klagenfurt to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Klagenfurt to Heathrow
Explore the most affordable flight options available from Klagenfurt to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 November 2025.

Sat 6/1214:50KLU - LHR
1 stop7h 50mAustrian Airlines
Tue 9/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 24/11£207
Tue 2/1214:50KLU - LHR
1 stop18h 30mAustrian Airlines
Thu 25/1219:25LHR - KLU
1 stop17h 25mAustrian Airlines
Deal found 25/11£226
Sat 6/1214:50KLU - LHR
1 stop7h 50mMultiple Airlines
Tue 9/1207:40LHR - KLU
2 stops5h 15mMultiple Airlines
Deal found 24/11£233
Sat 13/1205:45KLU - LHR
1 stop9h 20mMultiple Airlines
Tue 16/1206:30LHR - KLU
2 stops6h 25mMultiple Airlines
Deal found 24/11£247
Sat 6/1214:50KLU - LHR
1 stop7h 50mMultiple Airlines
Mon 8/1206:30LHR - KLU
2 stops6h 25mMultiple Airlines
Deal found 24/11£250
Sat 6/1214:50KLU - LHR
2 stops7h 10mLufthansa
Tue 9/1206:35LHR - KLU
2 stops6h 20mLufthansa
Deal found 24/11£256
Tue 2/1214:50KLU - LHR
2 stops9h 05mMultiple Airlines
Thu 25/1219:25LHR - KLU
1 stop17h 25mMultiple Airlines
Deal found 25/11£258
Sun 21/1214:40KLU - LHR
1 stop5h 00mMultiple Airlines
Thu 25/1219:15LHR - KLU
2 stops17h 35mMultiple Airlines
Deal found 26/11£259
Sat 29/1105:45KLU - LHR
1 stop13h 55mAustrian Airlines
Sat 6/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 24/11£269
Mon 22/1215:15KLU - LHR
1 stop18h 05mAustrian Airlines
Mon 29/1206:00LHR - KLU
1 stop6h 50mAustrian Airlines
Deal found 26/11£270
Sat 6/1214:50KLU - LHR
2 stops7h 10mLufthansa
Mon 8/1206:30LHR - KLU
2 stops6h 25mLufthansa
Deal found 24/11£273

Cheapflights Fare Finder

 
Customise your flight search to find flights from Klagenfurt 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 26 November 2025.
Use the filters below to find and compare flights from Klagenfurt to London Heathrow Airport that are best for you.

Fly from

Klagenfurt

Fly to

Heathrow

Route

Depart

Return

Price

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Mon 9/3

14:50-21:40

1 stop7h 50m

London Heathrow

Sun 15/3

09:05-23:25

1 stop13h 20m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Mon 12/1

15:15-21:40

1 stop7h 25m

London Heathrow

Fri 16/1

09:05-13:50

1 stop3h 45m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Mon 16/3

14:50-18:40

1 stop4h 50m

London Heathrow

Sat 21/3

06:00-13:55

1 stop6h 55m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Wed 11/3

14:50-21:40

1 stop7h 50m

London Heathrow

Sun 15/3

09:05-23:25

1 stop13h 20m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Mon 12/1

15:15-18:40

1 stop4h 25m

London Heathrow

Thu 22/1

06:00-13:50

1 stop6h 50m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 13/3

14:50-21:40

1 stop7h 50m

London Heathrow

Sun 15/3

09:05-23:25

1 stop13h 20m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 16/1

15:15-21:40

1 stop7h 25m

London Heathrow

Sun 18/1

06:00-13:50

1 stop6h 50m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 14/2

16:00-21:40

1 stop6h 40m

London Heathrow

Thu 19/2

09:05-23:20

1 stop13h 15m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 15/1

15:15-18:40

1 stop4h 25m

London Heathrow

Thu 22/1

09:05-13:50

1 stop3h 45m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 13/3

14:50-18:40

1 stop4h 50m

London Heathrow

Mon 16/3

06:00-13:55

1 stop6h 55m

£177

Flights are sorted by cheapest return flights first.

Deals found on 26/11

Showing 1-10 of 23 results
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Best time to book a flight from Klagenfurt to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Klagenfurt 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 Klagenfurt to London Heathrow Airport

What is the cheapest month to book a flight from Klagenfurt to London Heathrow Airport?

Currently, March is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £137). Flying from Klagenfurt to London Heathrow Airport in November is currently the most expensive (average of £192). 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.

Related info for your journey

Find useful and relevant information for your journey from Klagenfurt 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 Klagenfurt to London Heathrow?

    Klagenfurt (KLU) is the airport you will fly out of if you book a flight from Klagenfurt to London Heathrow. You should not have trouble finding flights to London Heathrow from Klagenfurt; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Klagenfurt airport to London Heathrow. It is only a 2.0 mi journey to Klagenfurt (KLU) from Klagenfurt’s city center.

  • How long is the flight from Klagenfurt to London Heathrow Airport?

    A quick flight from Klagenfurt to London Heathrow Airport can take about 7h 50m. Austrian Airlines provides one of the quickest options available for as low as £177. Klagenfurt and London Heathrow Airport are separated by a distance of 745 mi.

  • Can I find deals for flights from Klagenfurt to Heathrow that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Klagenfurt 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 Klagenfurt to London Heathrow Airport?

    Currently, March is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £137). Flying from Klagenfurt to London Heathrow Airport in November is currently the most expensive (average of £192). 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
Slough
Croydon
Hounslow
Northampton
Gatwick
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Brentford
Winchester
Swindon
Crawley
Romford
Chichester
Bedford

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Alternative routes for Klagenfurt to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Klagenfurt to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Klagenfurt to Heathrow for you. Better yet — we are completely free to use.

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

Yes! Cheapflights helps users easily find flights from Klagenfurt to Heathrow with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from Klagenfurt today and book when prices fit your budget.

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