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Cheap flights from London Heathrow Airport to Klagenfurt from £92

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
4 May — 11 May1
1 adult
1 adult, Economy, 0 bags

Cheap 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 4 April 2026.

Tue 6/1019:30
LHR
-
KLU
1 stop26h 50m
Austrian Airlines
Sat 10/1015:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 1/4£269
Sun 17/520:50
LHR
-
KLU
2 stops17h 20m
Multiple Airlines
Sun 24/520:05
KLU
-
LHR
2 stops16h 05m
Multiple Airlines
Deal found 2/4£275
Sat 18/406:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Wed 22/415:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 1/4£275
Sat 2/506:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Wed 6/515:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 31/3£278
Fri 15/506:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Fri 22/511:10
KLU
-
LHR
1 stop22h 10m
Austrian Airlines
Deal found 31/3£288
Wed 15/409:05
LHR
-
KLU
1 stop3h 55m
Austrian Airlines
Wed 22/415:00
KLU
-
LHR
1 stop4h 40m
Austrian Airlines
Deal found 2/4£289
Sun 28/606:00
LHR
-
KLU
1 stop16h 20m
Austrian Airlines
Fri 3/714:05
KLU
-
LHR
1 stop8h 35m
Austrian Airlines
Deal found 30/3£290
Wed 9/919:30
LHR
-
KLU
1 stop17h 30m
Austrian Airlines
Mon 14/915:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 1/4£298

Find 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 4 April 2026.

Round-trip from

£275

One-way from

£92

Popular in

November

Cheapest in

January

Average price

£52
17/5-24/5
  • 17/5-24/5
  • 4 total stops
  • 33h 25m total
  • London to Klagenfurt
Search Deals
20/4
  • 20/4
  • 2 total stops
  • 16h 50m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£33 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
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 4 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Klagenfurt that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 18/4

06:00-14:00

1 stop7h 00m

Klagenfurt

Wed 22/4

15:00-08:20

1 stop18h 20m

£275

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sun 3/5

06:00-14:00

1 stop7h 00m

Klagenfurt

Sun 10/5

15:00-08:20

1 stop18h 20m

£289

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sun 28/6

06:00-23:20

1 stop16h 20m

Klagenfurt

Fri 3/7

14:05-21:40

1 stop8h 35m

£290

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 9/9

19:30-14:00

1 stop17h 30m

Klagenfurt

Mon 14/9

15:00-08:20

1 stop18h 20m

£298

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 1/8

09:05-14:00

1 stop3h 55m

Klagenfurt

Sun 9/8

14:05-08:20

1 stop19h 15m

£304

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 18/5

20:55-14:40

2 stops16h 45m

Klagenfurt

Mon 25/5

15:45-16:15

2 stops25h 30m

£309
Fastest return journey

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 18/7

06:00-14:00

1 stop7h 00m

Klagenfurt

Sun 19/7

14:05-18:40

1 stop5h 35m

£312

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 30/4

09:05-23:20

1 stop13h 15m

Klagenfurt

Mon 4/5

05:50-11:25

1 stop6h 35m

£312

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 17/7

06:00-13:25

1 stop6h 25m

Klagenfurt

Sun 19/7

14:05-21:40

1 stop8h 35m

£312

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 22/4

09:05-23:20

1 stop13h 15m

Klagenfurt

Sun 3/5

15:00-11:25

1 stop21h 25m

£312

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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.

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 4 April 2026.
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
904 reviews
Check prices

Boarding

7.6

Food

6.8

Overall

7.6

Entertainment

6.8

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful
Austrian Airlines
7.6
Good
904 reviews
Austrian Airlines
7.6
Good
904 reviews
Check prices

Boarding

7.6

Food

6.8

Overall

7.6

Entertainment

6.8

Crew

8.1

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

VIE - DXB

Awful . Flight was overbooked. The boarding cards could not be printed, you had to wait more than one hour in a line that only two kiosks were working, staff was leaving and inside the plane they had the same seats in 3 cases at least winter twice!! I’ve never experienced such a disorganization! Awful

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 7h. 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 £169, was found to be the cheapest airline from London Heathrow Airport to Klagenfurt..

  • 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.

See more FAQs

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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 4 April 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£169Average£289FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights

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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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