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Cheap flights from London Heathrow Airport to Klagenfurt from £110

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
24 Aug — 31 Aug1
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 25 July 2026.

Tue 8/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Tue 15/915:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 25/7£185
Wed 16/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Sat 19/915:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 20/7£186
Fri 18/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Wed 23/915:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 23/7£189
Fri 18/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Tue 22/915:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 23/7£197
Wed 16/906:55
LHR
-
KLU
2 stops6h 05m
Multiple Airlines
Sat 19/915:00
KLU
-
LHR
1 stop18h 20m
Multiple Airlines
Deal found 20/7£198
Tue 8/907:25
LHR
-
KLU
2 stops5h 35m
Multiple Airlines
Tue 15/915:00
KLU
-
LHR
1 stop18h 20m
Multiple Airlines
Deal found 24/7£200
Sat 5/906:00
LHR
-
KLU
1 stop6h 25m
Austrian Airlines
Mon 7/915:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 22/7£202
Mon 7/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Mon 14/915:00
KLU
-
LHR
1 stop18h 20m
Austrian Airlines
Deal found 24/7£203
Fri 18/906:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Thu 24/915:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 23/7£205
Mon 7/906:00
LHR
-
KLU
1 stop7h 00m
Multiple Airlines
Mon 14/915:00
KLU
-
LHR
2 stops18h 15m
Multiple Airlines
Deal found 24/7£211

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 25 July 2026.

Round-trip from

£185

One-way from

£110

Popular in

April

Cheapest in

January

Average price

£116
Austrian Airlines
  • Austrian Airlines
  • 8/9-15/9
  • 2 total stops
  • 25h 20m total
  • London to Klagenfurt
Search Deals
31/8
  • 31/8
  • 2 total stops
  • 16h 50m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 20% potential price decrease (£31 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 25 July 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

Tue 8/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Tue 15/9

15:00-08:20

1 stop18h 20m

£185

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 16/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Sat 19/9

15:00-08:20

1 stop18h 20m

£186
Fastest return journey

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 19/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Wed 23/9

15:00-21:40

1 stop7h 40m

£189

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 18/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Tue 22/9

15:00-21:40

1 stop7h 40m

£197

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 16/9

06:55-14:00

2 stops6h 05m

Klagenfurt

Sat 19/9

15:00-08:20

1 stop18h 20m

£198

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Tue 8/9

07:25-14:00

2 stops5h 35m

Klagenfurt

Tue 15/9

15:00-08:20

1 stop18h 20m

£201

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 5/9

06:00-13:25

1 stop6h 25m

Klagenfurt

Mon 7/9

15:00-08:20

1 stop18h 20m

£202

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 14/9

20:50-14:40

2 stops16h 50m

Klagenfurt

Wed 16/9

17:55-09:10

2 stops16h 15m

£203

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 7/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Mon 14/9

15:00-08:20

1 stop18h 20m

£203

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 19/9

06:00-14:00

1 stop7h 00m

Klagenfurt

Thu 24/9

15:00-21:40

1 stop7h 40m

£205

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Showing 1-10 of 21 resultsSorted by cheapest first
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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 25 July 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
951 reviews
Check prices

Crew

8.1

Entertainment

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Edward,Jul 2026

YUL - VIE

I was upgraded to business class due to my bid because accepted. EXTREMELY polite and friendly service. Decent seats and good food. Highly recommend it. If you can arrange to travel on a day when not very many business people are traveling (e.g., Wednesday) then you can possibly get an excellent seat at a great price.
Austrian Airlines
7.6
Good
951 reviews
Austrian Airlines
7.6
Good
951 reviews
Check prices

Crew

8.1

Entertainment

6.8

Overall

7.6

Boarding

7.6

Comfort

7.3

Food

6.8

Reviews

1 / 20
10.0
Excellent

Edward,Jul 2026

YUL - VIE

I was upgraded to business class due to my bid because accepted. EXTREMELY polite and friendly service. Decent seats and good food. Highly recommend it. If you can arrange to travel on a day when not very many business people are traveling (e.g., Wednesday) then you can possibly get an excellent seat at a great price.

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 £168, 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 25 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£168Average£288FlexibilityNo 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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