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Cheap flights from London Heathrow Airport to Klagenfurt 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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
29 Apr — 6 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 30 March 2026.

Sat 9/506:00
LHR
-
KLU
1 stop3h 30m
Austrian Airlines
Sat 16/511:10
KLU
-
LHR
1 stop11h 30m
Austrian Airlines
Deal found 25/3£184
Mon 11/506:00
LHR
-
KLU
1 stop3h 30m
Austrian Airlines
Mon 18/511:10
KLU
-
LHR
1 stop11h 30m
Austrian Airlines
Deal found 27/3£194
Sat 9/506:00
LHR
-
KLU
1 stop3h 30m
Multiple Airlines
Sat 16/511:10
KLU
-
LHR
2 stops10h 35m
Multiple Airlines
Deal found 25/3£199
Thu 11/606:00
LHR
-
KLU
1 stop16h 20m
Austrian Airlines
Tue 16/615:00
KLU
-
LHR
1 stop7h 40m
Austrian Airlines
Deal found 26/3£201
Mon 13/706:00
LHR
-
KLU
1 stop7h 00m
Austrian Airlines
Fri 17/714:05
KLU
-
LHR
1 stop8h 35m
Austrian Airlines
Deal found 26/3£201
Sun 10/506:00
LHR
-
KLU
1 stop7h 00m
Multiple Airlines
Sun 17/511:10
KLU
-
LHR
2 stops30h 30m
Multiple Airlines
Deal found 26/3£205
Wed 13/506:00
LHR
-
KLU
1 stop3h 30m
Austrian Airlines
Sat 16/511:10
KLU
-
LHR
1 stop8h 30m
Austrian Airlines
Deal found 28/3£212
Mon 11/506:00
LHR
-
KLU
1 stop3h 30m
Multiple Airlines
Mon 18/511:10
KLU
-
LHR
2 stops6h 55m
Multiple Airlines
Deal found 27/3£213
Sun 10/507:25
LHR
-
KLU
2 stops5h 35m
Lufthansa
Sun 17/511:10
KLU
-
LHR
2 stops30h 30m
Lufthansa
Deal found 26/3£217
Sat 9/516:25
LHR
-
KLU
2 stops20h 35m
Lufthansa
Sat 16/511:10
KLU
-
LHR
2 stops23h 45m
Lufthansa
Deal found 25/3£218
Mon 13/706:30
LHR
-
KLU
2 stops6h 30m
Multiple Airlines
Fri 17/714:05
KLU
-
LHR
1 stop8h 35m
Multiple Airlines
Deal found 26/3£219

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 30 March 2026.

Round-trip from

£184

One-way from

£90

Popular in

November

Cheapest in

January

Average price

£124
Austrian Airlines
  • Austrian Airlines
  • 9/5-16/5
  • 2 total stops
  • 15h 00m 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 (£34 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 March 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 30 March 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

Thu 11/6

06:00-23:20

1 stop16h 20m

Klagenfurt

Tue 16/6

15:00-21:40

1 stop7h 40m

£201

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sun 10/5

06:00-14:00

1 stop7h 00m

Klagenfurt

Sun 17/5

11:10-08:20

1 stop22h 10m

£205

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 9/5

16:25-14:00

2 stops20h 35m

Klagenfurt

Sat 16/5

11:10-09:55

2 stops23h 45m

£218

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 10/4

09:05-14:00

1 stop3h 55m

Klagenfurt

Mon 13/4

15:00-08:20

1 stop18h 20m

£222

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 25/7

06:00-14:00

1 stop7h 00m

Klagenfurt

Sun 2/8

14:05-21:40

1 stop8h 35m

£247

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 11/6

11:30-23:20

2 stops10h 50m

Klagenfurt

Tue 16/6

15:00-22:10

2 stops8h 10m

£261

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Tue 12/5

20:50-17:20

2 stops19h 30m

Klagenfurt

Tue 19/5

15:15-09:10

2 stops18h 55m

£262

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 25/7

06:30-14:00

2 stops6h 30m

Klagenfurt

Sun 2/8

14:05-07:40

2 stops18h 35m

£262
Fastest return journey

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 10/4

07:25-14:00

2 stops5h 35m

Klagenfurt

Mon 13/4

15:00-22:10

2 stops8h 10m

£265

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 18/4

09:05-14:00

1 stop3h 55m

Klagenfurt

Wed 22/4

15:00-08:20

1 stop18h 20m

£277

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 23 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 30 March 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
903 reviews
Check prices

Overall

7.6

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

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
903 reviews
Austrian Airlines
7.6
Good
903 reviews
Check prices

Overall

7.6

Entertainment

6.8

Boarding

7.6

Crew

8.1

Food

6.8

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 and Lufthansa fly from London Heathrow Airport to Klagenfurt in about 16h 20m. The time it takes to get you to your destination can typically vary by up to 4h 15m. Airlines will cover a distance of 745 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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 30 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£169Average£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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