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Cheap flights from London Heathrow Airport to Klagenfurt 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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
23 Nov — 30 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Heathrow to Klagenfurt

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Klagenfurt
Explore the most affordable flight options available from Heathrow to Klagenfurt. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2025.

Mon 1/1206:00LHR - KLU
1 stop16h 25mAustrian Airlines
Mon 15/1214:50KLU - LHR
1 stop18h 30mAustrian Airlines
Deal found 23/10£168
Sat 22/1106:00LHR - KLU
1 stop6h 55mAustrian Airlines
Mon 24/1114:50KLU - LHR
1 stop24h 15mAustrian Airlines
Deal found 24/10£174
Sat 6/1219:25LHR - KLU
1 stop17h 30mAustrian Airlines
Sat 13/1205:45KLU - LHR
1 stop13h 55mAustrian Airlines
Deal found 22/10£178
Mon 1/1206:00LHR - KLU
1 stop6h 55mMultiple Airlines
Mon 15/1214:50KLU - LHR
2 stops9h 05mMultiple Airlines
Deal found 23/10£184
Sat 22/1106:00LHR - KLU
1 stop6h 55mMultiple Airlines
Mon 24/1114:50KLU - LHR
2 stops7h 10mMultiple Airlines
Deal found 23/10£193
Fri 21/1106:00LHR - KLU
1 stop6h 55mAustrian Airlines
Fri 28/1114:50KLU - LHR
1 stop7h 50mAustrian Airlines
Deal found 22/10£198
Sat 6/1220:15LHR - KLU
2 stops16h 40mMultiple Airlines
Sat 13/1205:45KLU - LHR
1 stop9h 20mMultiple Airlines
Deal found 22/10£199

Cheap flight deals from Heathrow to Klagenfurt

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Klagenfurt (KLU). 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 24 October 2025.

Round-trip from

£162

One-way from

£142

Popular in

May

Cheapest in

January

Average price

£294
Austrian Airlines
  • Austrian Airlines
  • 9/4-16/4
  • 2 total stops
  • 24h 05m total
  • London to Klagenfurt
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 18/11
  • 1 total stop
  • 6h 55m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Klagenfurt 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 24 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Klagenfurt that are best for you.

Fly from

Heathrow

Fly to

Klagenfurt

Route

Depart

Return

Price

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 9/4

06:00-23:25

1 stop16h 25m

Klagenfurt

Thu 16/4

15:00-21:40

1 stop7h 40m

£162

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 1/12

06:00-23:25

1 stop16h 25m

Klagenfurt

Mon 15/12

14:50-08:20

1 stop18h 30m

£168

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 22/11

06:00-13:55

1 stop6h 55m

Klagenfurt

Mon 24/11

14:50-14:05

1 stop24h 15m

£174

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 6/12

19:25-13:55

1 stop17h 30m

Klagenfurt

Sat 13/12

05:45-18:40

1 stop13h 55m

£178

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 30/3

06:00-14:00

1 stop7h 00m

Klagenfurt

Sat 4/4

15:00-21:40

1 stop7h 40m

£183

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 1/12

06:00-13:55

1 stop6h 55m

Klagenfurt

Mon 15/12

14:50-22:55

2 stops9h 05m

£184

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 19/3

09:05-13:55

1 stop3h 50m

Klagenfurt

Thu 26/3

14:50-22:55

2 stops9h 05m

£185

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 22/11

06:00-13:55

1 stop6h 55m

Klagenfurt

Mon 24/11

14:50-22:55

2 stops9h 05m

£193

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Tue 18/11

06:00-13:55

1 stop6h 55m

£142

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Tue 18/11

13:50-23:25

2 stops8h 35m

£148

Flights are sorted by cheapest return flights first.

Deals found on 23/10

Showing 1-10 of 19 results
1
2

Best time to book a flight from Heathrow to Klagenfurt

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

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

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Klagenfurt (average of £145). Flying from London Heathrow Airport to Klagenfurt in May is currently the most expensive (average of £318). 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.

Reviews of airlines servicing Klagenfurt

Get insights into the airlines that provide service to Klagenfurt. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Klagenfurt. Reviews last updated 24 October 2025.
Read reviews from past customers who have flown with Austrian Airlines from London Heathrow Airport to Klagenfurt. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
863 reviews
Check prices

Food

6.8

Comfort

7.3

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sept 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.
Austrian Airlines
7.6
Good
863 reviews
Austrian Airlines
7.6
Good
863 reviews
Check prices

Food

6.8

Comfort

7.3

Crew

8.1

Boarding

7.6

Overall

7.6

Entertainment

6.8

Reviews

1 / 20
10.0
Excellent

Andrew,Sept 2025

FLR - VIE

Staff was really nice, they provided water as a beverage. Otherwise you had to purchase beverages or food. A complementary chocolate was provided at the end of the flight.

Related info for your journey

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

    Klagenfurt (KLU) is the airport you will fly into if you book a flight from London Heathrow to Klagenfurt. You should not have trouble finding flights to Klagenfurt from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Klagenfurt airport from London Heathrow. It is only a 2.0 mi journey from Klagenfurt (KLU) to Klagenfurt’s city center.

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

    Airlines like Austrian Airlines fly from London Heathrow Airport to Klagenfurt in about 16h 25m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 745 mi.

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

    Austrian Airlines, at £157, was found to be the cheapest airline from London Heathrow Airport to Klagenfurt.. This flight start at 35% lower than the current average price 3 months from now.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Klagenfurt (average of £145). Flying from London Heathrow Airport to Klagenfurt in May is currently the most expensive (average of £318). 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

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Alternative routes for Heathrow to Klagenfurt

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Heathrow to Klagenfurt

Discover the top airline that operate flights from Heathrow to Klagenfurt. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 24 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£157Average£256FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights

Fly with Cheapflights

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

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

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Klagenfurt for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Need flexible booking options for your flight to Klagenfurt from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

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

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