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Cheap flights from Klagenfurt to London Heathrow Airport from £161

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 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — LHR
12 Feb — 19 Feb1
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 13 January 2026.

Round-trip from

£166

One-way from

£161

Popular in

December

Cheapest in

February

Average price

£43
Austrian Airlines
  • Austrian Airlines
  • 19/3-23/3
  • 2 total stops
  • 25h 20m total
  • Klagenfurt to London
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16/4
  • 16/4
  • 3 total stops
  • 15h 20m total
  • Klagenfurt to London
Search Deals
Highest demand for flights based on searches. 37% potential increase in price (£108 potential increase over avg. return price).
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Cheapest flight prices on average. 11% potential price decrease (£18 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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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 13 January 2026.

Thu 19/314:50
KLU
-
LHR
1 stop7h 50m
Austrian Airlines
Mon 23/319:25
LHR
-
KLU
1 stop17h 30m
Austrian Airlines
Deal found 11/1£166
Fri 13/305:45
KLU
-
LHR
1 stop13h 55m
Austrian Airlines
Sun 15/306:00
LHR
-
KLU
1 stop16h 25m
Austrian Airlines
Deal found 11/1£170
Thu 26/215:15
KLU
-
LHR
1 stop18h 05m
Austrian Airlines
Mon 2/306:00
LHR
-
KLU
1 stop6h 55m
Austrian Airlines
Deal found 11/1£171
Fri 27/215:15
KLU
-
LHR
1 stop7h 25m
Austrian Airlines
Mon 2/306:00
LHR
-
KLU
1 stop16h 25m
Austrian Airlines
Deal found 11/1£172
Sat 14/216:00
KLU
-
LHR
1 stop6h 40m
Austrian Airlines
Wed 18/209:05
LHR
-
KLU
1 stop3h 45m
Austrian Airlines
Deal found 11/1£172
Thu 26/215:15
KLU
-
LHR
1 stop7h 25m
Austrian Airlines
Tue 3/306:00
LHR
-
KLU
1 stop6h 55m
Austrian Airlines
Deal found 12/1£173
Sat 2/515:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Wed 6/506:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Deal found 11/1£175
Thu 12/215:15
KLU
-
LHR
1 stop4h 25m
Austrian Airlines
Tue 17/219:25
LHR
-
KLU
1 stop17h 25m
Austrian Airlines
Deal found 11/1£176
Sun 15/211:15
KLU
-
LHR
1 stop11h 25m
Austrian Airlines
Thu 19/219:25
LHR
-
KLU
1 stop17h 25m
Austrian Airlines
Deal found 12/1£181
Wed 11/215:15
KLU
-
LHR
1 stop7h 25m
Austrian Airlines
Mon 16/206:00
LHR
-
KLU
1 stop6h 50m
Austrian Airlines
Deal found 12/1£181
Fri 13/314:50
KLU
-
LHR
1 stop4h 50m
Austrian Airlines
Fri 20/306:00
LHR
-
KLU
1 stop6h 55m
Austrian Airlines
Deal found 12/1£182
Tue 7/415:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Sat 11/406:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Deal found 12/1£183

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 13 January 2026.
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

Wed 18/2

15:15-21:40

1 stop7h 25m

London Heathrow

Sun 22/2

06:00-10:35

1 stop3h 35m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Wed 18/3

05:45-14:05

1 stop9h 20m

London Heathrow

Tue 24/3

06:00-13:55

1 stop6h 55m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 14/3

16:00-21:40

1 stop6h 40m

London Heathrow

Sat 21/3

06:00-13:55

1 stop6h 55m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Wed 11/2

15:15-21:40

1 stop7h 25m

London Heathrow

Mon 16/2

09:05-13:50

1 stop3h 45m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 12/2

15:15-18:40

1 stop4h 25m

London Heathrow

Mon 16/2

06:00-13:50

1 stop6h 50m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 19/3

14:50-21:40

1 stop7h 50m

London Heathrow

Tue 24/3

06:00-13:55

1 stop6h 55m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Wed 18/3

14:50-18:40

1 stop4h 50m

London Heathrow

Mon 23/3

06:00-13:55

1 stop6h 55m

£173

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 2/5

15:00-21:40

1 stop7h 40m

London Heathrow

Wed 6/5

06:00-14:00

1 stop7h 00m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 12/2

15:15-18:40

1 stop4h 25m

London Heathrow

Tue 17/2

19:25-13:50

1 stop17h 25m

£176

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 13/3

14:50-18:40

1 stop4h 50m

London Heathrow

Fri 20/3

06:00-13:55

1 stop6h 55m

£182

Flights are sorted by cheapest return flights first.

Deals found on 12/1

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, February is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £126). 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 25m. Austrian Airlines provides one of the quickest options available for as low as £173. 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, February is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £126). 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
Croydon
Luton
Northampton
Slough
Gatwick
Hounslow
Wembley
Ilford
Brentford
Hayes
Colchester
Watford
Crawley
Kingston upon Thames
Swindon
Bedford
Chelmsford
Eastbourne
Romford

Browse thousands of different options on Cheapflights for your next trip

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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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