What is the cheapest airline to fly from Klagenfurt to London Heathrow Airport round-trip?

Austrian Airlines, at £175, was found to be the cheapest airline from Klagenfurt to London Heathrow Airport.. This flight start at 16% lower than the current average price 3 months from now.

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.

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).

How far in advance should I book a flight from Klagenfurt to London Heathrow Airport?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 24 days in advance, which can save you up to 93% on flights from Klagenfurt to London Heathrow Airport compared to booking the week you need them. Waiting 24 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £59. For sooner than that we have options available in the next 3 days from £83.

What is the cheapest month to fly from Klagenfurt to London Heathrow Airport?

January can be a great time to fly to London Heathrow Airport from Klagenfurt with a flight ticket averaging about £120. Cheapflights users have found deals in the month of January for as cheap as £30. The most expensive prices can be found in the month of August.

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

When flying from Klagenfurt to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

£90+ Cheap Flights from Klagenfurt to London Heathrow Airport

Cheap flight deals from Klagenfurt to Heathrow

Round-trip from	£175
One-way from	£90
Popular in	December
Cheapest in	January
Average price	£208

Austrian Airlines
11/9-14/9
2 total stops
20h 25m total
Klagenfurt to London

Search Deals

7/10
2 total stops
31h 00m total
Klagenfurt to London

Search Deals

High demand for flights, 1% potential price rise

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Klagenfurt to Heathrow

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 August 2025.

Thu 11/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Sun 14/906:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 11/8£175

Thu 9/1005:45KLU - LHR

1 stop4h 00mAustrian Airlines

Sun 12/1009:05LHR - KLU

1 stop3h 55mAustrian Airlines

Deal found 11/8£176

Thu 4/915:00KLU - LHR

1 stop18h 20mAustrian Airlines

Thu 18/906:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 12/8£178

Tue 4/1114:50KLU - LHR

1 stop4h 50mAustrian Airlines

Sat 8/1114:50LHR - KLU

1 stop22h 05mAustrian Airlines

Deal found 11/8£179

Thu 11/1214:50KLU - LHR

1 stop4h 50mAustrian Airlines

Sun 14/1206:00LHR - KLU

1 stop6h 55mAustrian Airlines

Deal found 12/8£189

Thu 25/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Sun 28/906:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 12/8£192

Fri 19/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Mon 22/906:00LHR - KLU

1 stop7h 00mAustrian Airlines

Deal found 12/8£193

Mon 1/1214:50KLU - LHR

1 stop18h 30mMultiple Airlines

Sat 6/1206:35LHR - KLU

2 stops6h 20mMultiple Airlines

Deal found 12/8£196

Fri 19/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Sun 21/906:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 11/8£197

Best flights from Klagenfurt to Heathrow
Discover carefully curated flight deals from Klagenfurt to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 August 2025.

Thu 11/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Sun 14/906:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 11/8£175

Mon 1/1214:50KLU - LHR

1 stop18h 30mAustrian Airlines

Sat 6/1206:00LHR - KLU

1 stop6h 55mAustrian Airlines

Deal found 11/8£175

Fri 3/1015:00KLU - LHR

1 stop7h 40mAustrian Airlines

Mon 6/1006:00LHR - KLU

1 stop7h 00mAustrian Airlines

Deal found 11/8£175

Thu 23/1015:00KLU - LHR

1 stop4h 40mAustrian Airlines

Mon 27/1006:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 12/8£175

Tue 18/1114:50KLU - LHR

1 stop7h 50mAustrian Airlines

Sat 22/1106:00LHR - KLU

1 stop6h 55mAustrian Airlines

Deal found 12/8£175

Fri 26/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Mon 29/906:00LHR - KLU

1 stop7h 00mAustrian Airlines

Deal found 11/8£175

Thu 20/1105:45KLU - LHR

1 stop9h 20mAustrian Airlines

Mon 24/1106:00LHR - KLU

1 stop6h 55mAustrian Airlines

Deal found 12/8£175

Sat 10/116:00KLU - LHR

1 stop6h 40mAustrian Airlines

Wed 14/114:50LHR - KLU

1 stop22h 00mAustrian Airlines

Deal found 12/8£175

Fri 3/1015:00KLU - LHR

1 stop7h 40mAustrian Airlines

Tue 7/1009:05LHR - KLU

1 stop3h 55mAustrian Airlines

Deal found 11/8£175

Thu 2/1005:45KLU - LHR

1 stop4h 00mAustrian Airlines

Thu 9/1009:05LHR - KLU

1 stop3h 55mAustrian Airlines

Deal found 11/8£175

Last-minute flights from Klagenfurt to Heathrow
Discover last-minute flight deals from Klagenfurt to Heathrow. Data last updated 13 August 2025 and is based on user searches.

Tue 19/805:45KLU - LHR

1 stop4h 00mAustrian Airlines

Thu 11/906:00LHR - KLU

1 stop7h 00mAustrian Airlines

Deal found 12/8£210

Tue 19/805:45KLU - LHR

2 stops7h 55mMultiple Airlines

Thu 11/906:00LHR - KLU

1 stop7h 00mMultiple Airlines

Deal found 12/8£247

Tue 19/805:45KLU - LHR

2 stops7h 55mLufthansa

Thu 11/911:30LHR - KLU

2 stops10h 55mLufthansa

Deal found 12/8£284

Thu 21/815:00KLU - LHR

1 stop4h 40mAustrian Airlines

Thu 11/906:00LHR - KLU

1 stop7h 00mAustrian Airlines

Deal found 12/8£234

Thu 21/815:00KLU - LHR

1 stop4h 40mAustrian Airlines

Tue 26/809:05LHR - KLU

1 stop3h 55mAustrian Airlines

Deal found 12/8£250

Thu 21/805:45KLU - LHR

2 stops9h 55mMultiple Airlines

Tue 26/806:00LHR - KLU

1 stop7h 00mMultiple Airlines

Deal found 12/8£264

Thu 21/805:45KLU - LHR

2 stops10h 55mMultiple Airlines

Sun 24/806:00LHR - KLU

1 stop16h 25mMultiple Airlines

Deal found 11/8£282

Thu 21/805:45KLU - LHR

1 stop4h 00mAustrian Airlines

Sun 24/806:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 11/8£307

Fri 22/815:00KLU - LHR

2 stops6h 40mMultiple Airlines

Sun 24/806:00LHR - KLU

1 stop16h 25mMultiple Airlines

Deal found 11/8£278

Thu 4/915:00KLU - LHR

1 stop18h 20mAustrian Airlines

Thu 18/906:00LHR - KLU

1 stop16h 25mAustrian Airlines

Deal found 12/8£178

Thu 4/915:00KLU - LHR

2 stops8h 40mMultiple Airlines

Thu 11/906:00LHR - KLU

1 stop16h 25mMultiple Airlines

Deal found 12/8£198

Thu 4/915:00KLU - LHR

2 stops8h 40mMultiple Airlines

Sun 7/919:30LHR - KLU

1 stop26h 55mMultiple Airlines

Deal found 12/8£200

One-way flights from Klagenfurt to Heathrow
Search for one-way flight options from Klagenfurt to Heathrow. Find affordable one-way fares based on user searches. Data last updated 13 August 2025.

Tue 7/1008:45KLU - LHR

2 stops31h 00mMultiple Airlines

Deal found 12/8£90

Sun 19/1021:10KLU - LHR

2 stops18h 35mMultiple Airlines

Deal found 11/8£96

Thu 25/914:55KLU - LHR

2 stops19h 15mMultiple Airlines

Deal found 11/8£102

Thu 25/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Deal found 11/8£139

Tue 7/1015:00KLU - LHR

1 stop7h 40mAustrian Airlines

Deal found 12/8£140

Mon 6/1014:30KLU - LHR

1 stop5h 35mEurowings

Deal found 12/8£142

Thu 21/814:55KLU - LHR

2 stops19h 15mMultiple Airlines

Deal found 12/8£157

Thu 11/905:45KLU - LHR

1 stop4h 00mAustrian Airlines

Deal found 12/8£166

Sat 13/915:00KLU - LHR

1 stop7h 40mAustrian Airlines

Deal found 11/8£167

Thu 25/905:45KLU - LHR

2 stops11h 55mLufthansa

Deal found 11/8£168

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 11/9

05:45-08:45

1 stop4h 00m

London Heathrow

Sun 14/9

06:00-23:25

1 stop16h 25m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Mon 1/12

14:50-08:20

1 stop18h 30m

London Heathrow

Sat 6/12

06:00-13:55

1 stop6h 55m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 3/10

15:00-21:40

1 stop7h 40m

London Heathrow

Mon 6/10

06:00-14:00

1 stop7h 00m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 23/10

15:00-18:40

1 stop4h 40m

London Heathrow

Mon 27/10

06:00-23:25

1 stop16h 25m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Tue 18/11

14:50-21:40

1 stop7h 50m

London Heathrow

Sat 22/11

06:00-13:55

1 stop6h 55m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 26/9

05:45-08:45

1 stop4h 00m

London Heathrow

Mon 29/9

06:00-14:00

1 stop7h 00m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 20/11

05:45-14:05

1 stop9h 20m

London Heathrow

Mon 24/11

06:00-13:55

1 stop6h 55m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 10/1

16:00-21:40

1 stop6h 40m

London Heathrow

Wed 14/1

14:50-13:50

1 stop22h 00m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 3/10

15:00-21:40

1 stop7h 40m

London Heathrow

Tue 7/10

09:05-14:00

1 stop3h 55m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 2/10

05:45-08:45

1 stop4h 00m

London Heathrow

Thu 9/10

09:05-14:00

1 stop3h 55m

£175

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 18 results

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, January is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £112). Flying from Klagenfurt 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.

Related info for your journey

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.
What is the cheapest airline to fly from Klagenfurt to London Heathrow Airport round-trip?
Austrian Airlines, at £175, was found to be the cheapest airline from Klagenfurt to London Heathrow Airport.. This flight start at 16% lower than the current average price 3 months from now.
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, January is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £112). Flying from Klagenfurt 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.

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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.

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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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Cheap flights from Klagenfurt to London Heathrow Airport from £90

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Klagenfurt to Heathrow

Round-trip from

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Find flight deals from Klagenfurt to Heathrow

Cheapest flights from Klagenfurt to HeathrowExplore 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 August 2025.

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 August 2025.

Cheapflights Fare Finder

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

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.

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?

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?

What is the cheapest airline to fly from Klagenfurt to London Heathrow Airport round-trip?

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

How can I find direct flights from Klagenfurt to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

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.

Fly with Cheapflights

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

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

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

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

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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 August 2025.