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Cheap flights from Klagenfurt to London Heathrow Airport from £142

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 14/12. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — LHR
5 Dec — 12 Dec1
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 5 November 2025.

Round-trip from

£175

One-way from

£142

Popular in

December

Cheapest in

January

Average price

£195
Austrian Airlines
  • Austrian Airlines
  • 27/11-3/12
  • 2 total stops
  • 24h 15m total
  • Klagenfurt to London
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Austrian Airlines
  • Austrian Airlines
  • 14/12
  • 1 total stop
  • 18h 40m total
  • Klagenfurt to London
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£1 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£7 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 5 November 2025.

Thu 27/1114:50KLU - LHR
1 stop7h 50mAustrian Airlines
Wed 3/1206:00LHR - KLU
1 stop16h 25mAustrian Airlines
Deal found 4/11£175
Sat 29/1105:45KLU - LHR
1 stop9h 20mAustrian Airlines
Mon 1/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 4/11£176
Sat 6/1214:50KLU - LHR
1 stop4h 50mAustrian Airlines
Tue 9/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 4/11£179
Wed 26/1105:45KLU - LHR
1 stop9h 20mAustrian Airlines
Sat 29/1106:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 3/11£185
Mon 24/1114:50KLU - LHR
1 stop18h 30mAustrian Airlines
Mon 1/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 3/11£187
Tue 25/1114:50KLU - LHR
1 stop7h 50mAustrian Airlines
Sat 29/1106:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 3/11£188
Wed 3/1214:50KLU - LHR
1 stop7h 50mMultiple Airlines
Wed 10/1206:35LHR - KLU
2 stops6h 20mMultiple Airlines
Deal found 3/11£197
Sat 29/1105:45KLU - LHR
1 stop9h 20mMultiple Airlines
Wed 10/1206:35LHR - KLU
2 stops6h 20mMultiple Airlines
Deal found 3/11£198
Sat 22/1114:50KLU - LHR
1 stop7h 50mAustrian Airlines
Sat 29/1106:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 4/11£200
Thu 27/1114:50KLU - LHR
2 stops9h 05mMultiple Airlines
Wed 3/1206:00LHR - KLU
1 stop16h 25mMultiple Airlines
Deal found 4/11£201
Sat 22/1105:45KLU - LHR
1 stop16h 55mAustrian Airlines
Mon 1/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Deal found 3/11£203
Thu 18/1214:50KLU - LHR
1 stop7h 50mAustrian Airlines
Thu 25/1219:25LHR - KLU
1 stop17h 25mAustrian Airlines
Deal found 3/11£207

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 5 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

Sat 29/11

05:45-18:40

1 stop13h 55m

London Heathrow

Tue 9/12

06:00-13:55

1 stop6h 55m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 27/11

14:50-21:40

1 stop7h 50m

London Heathrow

Wed 10/12

06:00-13:55

1 stop6h 55m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 12/3

05:45-14:05

1 stop9h 20m

London Heathrow

Mon 16/3

14:50-23:25

1 stop7h 35m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 6/12

14:50-18:40

1 stop4h 50m

London Heathrow

Tue 9/12

06:00-13:55

1 stop6h 55m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 6/12

14:50-18:40

1 stop4h 50m

London Heathrow

Wed 10/12

06:00-13:55

1 stop6h 55m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Tue 31/3

15:00-18:40

1 stop4h 40m

London Heathrow

Sun 5/4

06:00-14:00

1 stop7h 00m

£181

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 29/11

14:50-18:40

1 stop4h 50m

London Heathrow

Sat 6/12

07:40-13:55

2 stops5h 15m

£198

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 28/11

05:45-14:05

1 stop9h 20m

London Heathrow

Tue 9/12

07:40-13:55

2 stops5h 15m

£198

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 6/12

14:50-21:40

1 stop7h 50m

London Heathrow

Tue 9/12

07:40-13:55

2 stops5h 15m

£198

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 6/12

14:50-18:40

1 stop4h 50m

London Heathrow

Wed 10/12

07:40-13:55

2 stops5h 15m

£198

Flights are sorted by cheapest return flights first.

Deals found on 3/11

Showing 1-10 of 22 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 £139). Flying from Klagenfurt to London Heathrow Airport in October is currently the most expensive (average of £184). 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 13h 55m. Austrian Airlines provides one of the quickest options available for as low as £179. 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 £139). Flying from Klagenfurt to London Heathrow Airport in October is currently the most expensive (average of £184). 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
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Swindon
Crawley
Brentford
Romford
Chichester
Ipswich

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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?

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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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