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Cheap flights from London Heathrow Airport to Klagenfurt from £134

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 16/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
9 Jan — 16 Jan1
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 10 December 2025.

Tue 16/1215:50LHR - KLU
2 stops6h 35mMultiple Airlines
Thu 8/115:15KLU - LHR
1 stop7h 25mMultiple Airlines
Deal found 9/12£262
Sun 28/1209:05LHR - KLU
1 stop3h 45mMultiple Airlines
Sun 4/111:10KLU - LHR
2 stops10h 50mMultiple Airlines
Deal found 9/12£369
Sun 28/1207:40LHR - KLU
2 stops5h 10mLufthansa
Sun 4/111:10KLU - LHR
2 stops10h 50mLufthansa
Deal found 9/12£375
Sat 27/1206:00LHR - KLU
1 stop3h 30mMultiple Airlines
Sat 27/1216:00KLU - LHR
2 stops28h 35mMultiple Airlines
Deal found 8/12£425
Sat 27/1206:00LHR - KLU
1 stop3h 30mAustrian Airlines
Sat 27/1216:00KLU - LHR
1 stop6h 40mAustrian Airlines
Deal found 8/12£429
Sun 28/1209:05LHR - KLU
1 stop3h 45mAustrian Airlines
Sun 4/111:10KLU - LHR
1 stop11h 30mAustrian Airlines
Deal found 9/12£429
Sat 13/1220:15LHR - KLU
2 stops16h 40mMultiple Airlines
Mon 15/1214:50KLU - LHR
1 stop4h 50mMultiple Airlines
Deal found 7/12£438
Tue 16/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Thu 8/115:15KLU - LHR
1 stop4h 25mAustrian Airlines
Deal found 9/12£451
Sat 13/1220:15LHR - KLU
2 stops16h 40mLufthansa
Mon 15/1214:50KLU - LHR
2 stops7h 10mLufthansa
Deal found 7/12£462
Sat 13/1219:25LHR - KLU
1 stop27h 00mAustrian Airlines
Mon 15/1214:50KLU - LHR
1 stop4h 50mAustrian Airlines
Deal found 7/12£571

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 10 December 2025.

Round-trip from

£169

One-way from

£134

Popular in

December

Cheapest in

January

Average price

£239
Austrian Airlines
  • Austrian Airlines
  • 22/1-29/1
  • 2 total stops
  • 14h 15m total
  • London to Klagenfurt
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 16/1
  • 1 total stop
  • 6h 50m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 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 10 December 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 22/1

06:00-13:50

1 stop6h 50m

Klagenfurt

Thu 29/1

15:15-21:40

1 stop7h 25m

£169

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 24/1

06:00-10:30

1 stop3h 30m

Klagenfurt

Mon 26/1

15:15-08:20

1 stop18h 05m

£172

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Tue 6/1

06:00-13:50

1 stop6h 50m

Klagenfurt

Mon 12/1

15:15-18:40

1 stop4h 25m

£176

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 7/1

09:05-13:50

1 stop3h 45m

Klagenfurt

Mon 12/1

15:15-21:40

1 stop7h 25m

£176

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 8/1

06:00-13:50

1 stop6h 50m

Klagenfurt

Thu 15/1

15:15-21:40

1 stop7h 25m

£177

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Fri 23/1

06:35-13:50

2 stops6h 15m

Klagenfurt

Fri 30/1

15:15-21:40

1 stop7h 25m

£181

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 12/3

06:00-13:55

1 stop6h 55m

Klagenfurt

Sun 15/3

14:40-14:05

1 stop24h 25m

£182

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 22/1

06:00-13:50

1 stop6h 50m

Klagenfurt

Thu 29/1

15:15-22:55

2 stops8h 40m

£183

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 7/1

07:40-13:50

2 stops5h 10m

Klagenfurt

Mon 12/1

15:15-18:40

1 stop4h 25m

£188

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 17/1

06:00-10:30

1 stop3h 30m

Klagenfurt

Mon 19/1

15:15-22:55

2 stops8h 40m

£190

Flights are sorted by cheapest return flights first.

Deals found on 7/12

Showing 1-10 of 23 results
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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.

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 June is currently the most expensive (average of £332). 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 10 December 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
879 reviews
Check prices

Crew

8.1

Entertainment

6.8

Boarding

7.6

Food

6.8

Overall

7.6

Comfort

7.3

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
879 reviews
Austrian Airlines
7.6
Good
879 reviews
Check prices

Crew

8.1

Entertainment

6.8

Boarding

7.6

Food

6.8

Overall

7.6

Comfort

7.3

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 6h 50m. 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..

  • 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 June is currently the most expensive (average of £332). 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 10 December 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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