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Cheap flights from London Heathrow Airport to Klagenfurt from £137

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 22/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KLU
3 Feb — 10 Feb1
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 January 2026.

Sat 14/306:00LHR - KLU
1 stop3h 30mAustrian Airlines
Wed 18/314:50KLU - LHR
1 stop4h 50mAustrian Airlines
Deal found 4/1£167
Thu 12/314:50LHR - KLU
1 stop7h 35mAustrian Airlines
Sun 15/314:40KLU - LHR
1 stop18h 40mAustrian Airlines
Deal found 2/1£168
Thu 5/206:00LHR - KLU
1 stop6h 50mAustrian Airlines
Thu 12/215:15KLU - LHR
1 stop4h 25mAustrian Airlines
Deal found 4/1£169
Fri 30/109:05LHR - KLU
1 stop3h 45mAustrian Airlines
Sun 1/214:05KLU - LHR
1 stop8h 35mAustrian Airlines
Deal found 2/1£169
Sat 2/506:00LHR - KLU
1 stop7h 00mAustrian Airlines
Sat 9/505:45KLU - LHR
1 stop13h 55mAustrian Airlines
Deal found 3/1£170
Sat 31/106:00LHR - KLU
1 stop3h 30mAustrian Airlines
Mon 2/215:15KLU - LHR
1 stop18h 05mAustrian Airlines
Deal found 4/1£172
Mon 16/206:00LHR - KLU
1 stop6h 50mAustrian Airlines
Mon 23/206:00KLU - LHR
1 stop9h 05mAustrian Airlines
Deal found 4/1£176
Sat 14/306:00LHR - KLU
1 stop3h 30mMultiple Airlines
Wed 18/314:50KLU - LHR
2 stops7h 10mMultiple Airlines
Deal found 3/1£183
Thu 5/209:05LHR - KLU
1 stop3h 45mMultiple Airlines
Thu 12/215:15KLU - LHR
2 stops8h 40mMultiple Airlines
Deal found 4/1£183
Fri 30/109:05LHR - KLU
1 stop3h 45mMultiple Airlines
Sun 1/214:05KLU - LHR
2 stops21h 20mMultiple Airlines
Deal found 2/1£184

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 January 2026.

Round-trip from

£167

One-way from

£137

Popular in

May

Cheapest in

January

Average price

£166
Austrian Airlines
  • Austrian Airlines
  • 14/3-18/3
  • 2 total stops
  • 8h 20m total
  • London to Klagenfurt
Search Deals
Austrian Airlines
  • Austrian Airlines
  • 22/2
  • 1 total stop
  • 13h 15m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£14 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 January 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 January 2026.
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

Sat 14/3

06:00-10:30

1 stop3h 30m

Klagenfurt

Wed 18/3

14:50-18:40

1 stop4h 50m

£167

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 12/3

14:50-23:25

1 stop7h 35m

Klagenfurt

Sun 15/3

14:40-21:40

1 stop8h 00m

£167

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 19/2

06:00-23:20

1 stop16h 20m

Klagenfurt

Mon 23/2

15:15-18:40

1 stop4h 25m

£167

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 5/2

06:00-13:50

1 stop6h 50m

Klagenfurt

Thu 12/2

15:15-18:40

1 stop4h 25m

£169

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 2/5

06:00-14:00

1 stop7h 00m

Klagenfurt

Sat 9/5

05:45-11:25

1 stop6h 40m

£171

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 31/1

06:00-10:30

1 stop3h 30m

Klagenfurt

Mon 2/2

15:15-08:20

1 stop18h 05m

£172

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 7/2

06:00-10:30

1 stop3h 30m

Klagenfurt

Mon 16/2

15:15-21:40

1 stop7h 25m

£172

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 16/2

06:00-13:50

1 stop6h 50m

Klagenfurt

Mon 23/2

06:00-14:05

1 stop9h 05m

£176

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 12/3

14:50-23:25

1 stop7h 35m

Klagenfurt

Sun 15/3

14:40-22:55

2 stops9h 15m

£183

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 16/2

06:00-13:50

1 stop6h 50m

£138

Flights are sorted by cheapest return flights first.

Deals found on 4/1

Showing 1-10 of 21 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 £144). Flying from London Heathrow Airport to Klagenfurt in July is currently the most expensive (average of £268). 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 4 January 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
888 reviews
Check prices

Entertainment

6.8

Boarding

7.6

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

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
888 reviews
Austrian Airlines
7.6
Good
888 reviews
Check prices

Entertainment

6.8

Boarding

7.6

Overall

7.6

Comfort

7.3

Crew

8.1

Food

6.8

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 3h 30m. 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 £156, 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 £144). Flying from London Heathrow Airport to Klagenfurt in July is currently the most expensive (average of £268). 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 4 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest£156Average£254FlexibilityNo 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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