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Cheap flights from London to Klagenfurt from £21

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 29/12. Fares are subject to change and may not be available on all flights or dates of travel.
LON — KLU
17 Dec — 24 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Klagenfurt

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 17 November 2025.

Round-trip from

£43

One-way from

£21

Popular in

September

Cheapest in

October

Average price

£182
Ryanair
  • Ryanair
  • 29/11-1/12
  • Nonstop
  • 4h 20m total
  • London to Klagenfurt
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Ryanair
  • Ryanair
  • 29/12
  • Nonstop
  • 2h 10m total
  • London to Klagenfurt
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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Find flight deals from London to Klagenfurt

Enter your travel dates to find the best prices.

Cheapest flights from London to Klagenfurt
Explore the most affordable flight options available from London to Klagenfurt. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 November 2025.

Sat 6/1205:55STN - KLU
Nonstop2h 10mRyanair
Mon 8/1210:00KLU - STN
Nonstop2h 10mRyanair
Deal found 17/11£30
Sat 6/1205:55STN - KLU
Nonstop2h 10mMultiple Airlines
Mon 8/1205:45KLU - STN
2 stops17h 45mMultiple Airlines
Deal found 17/11£200
Wed 31/1219:15LHR - KLU
2 stops41h 35mMultiple Airlines
Wed 7/115:15KLU - LHR
1 stop18h 05mMultiple Airlines
Deal found 16/11£205
Wed 31/1219:15LHR - KLU
2 stops41h 35mLufthansa
Wed 7/115:15KLU - LHR
2 stops8h 40mLufthansa
Deal found 16/11£220
Sat 6/1206:30LHR - KLU
2 stops6h 25mMultiple Airlines
Mon 8/1214:50KLU - LHR
1 stop18h 30mMultiple Airlines
Deal found 17/11£242
Sat 6/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Mon 8/1214:50KLU - LHR
1 stop18h 30mAustrian Airlines
Deal found 17/11£243
Sat 6/1220:15LHR - KLU
2 stops16h 40mLufthansa
Mon 8/1214:50KLU - LHR
2 stops9h 05mLufthansa
Deal found 17/11£245
Wed 31/1218:10LCY - KLU
2 stops42h 40mLufthansa
Wed 7/115:15KLU - LCY
2 stops18h 50mLufthansa
Deal found 16/11£267
Sun 14/1207:40LHR - KLU
2 stops5h 15mMultiple Airlines
Tue 6/115:15KLU - LHR
1 stop7h 25mMultiple Airlines
Deal found 16/11£280
Sun 14/1207:40LHR - KLU
2 stops5h 15mLufthansa
Tue 6/115:15KLU - LHR
2 stops6h 45mLufthansa
Deal found 16/11£294
Mon 29/1206:10STN - KLU
Nonstop2h 10mMultiple Airlines
Mon 29/1215:15KLU - STN
2 stops27h 25mMultiple Airlines
Deal found 17/11£300
Sun 14/1206:00LHR - KLU
1 stop6h 55mAustrian Airlines
Tue 6/115:15KLU - LHR
1 stop7h 25mAustrian Airlines
Deal found 16/11£311

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 17 November 2025.
Use the filters below to find and compare flights from London to Klagenfurt that are best for you.

Fly from

London

Fly to

Klagenfurt

Route

Depart

Return

Price

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Sat 6/12

05:55-09:05

Nonstop2h 10m

Klagenfurt

Mon 8/12

10:00-11:10

Nonstop2h 10m

£30

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Mon 2/2

06:10-09:20

Nonstop2h 10m

Klagenfurt

Mon 9/2

10:00-11:10

Nonstop2h 10m

£45

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Mon 2/2

06:10-09:20

Nonstop2h 10m

Klagenfurt

Sat 7/2

09:30-10:40

Nonstop2h 10m

£50

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Mon 2/2

06:10-09:20

Nonstop2h 10m

Klagenfurt

Fri 6/2

15:15-19:10

1 stop4h 55m

£136

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Mon 2/2

06:10-09:20

Nonstop2h 10m

Klagenfurt

Sat 7/2

16:00-19:10

1 stop4h 10m

£136

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Thu 5/2

08:00-13:50

1 stop4h 50m

Klagenfurt

Mon 9/2

10:00-11:10

Nonstop2h 10m

£169

LondonKlagenfurt

STN - KLU

STNKLU

London Stansted

Thu 5/2

08:00-13:50

1 stop4h 50m

Klagenfurt

Sat 7/2

09:30-10:40

Nonstop2h 10m

£174

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 4/2

06:00-13:50

1 stop6h 50m

Klagenfurt

Mon 9/2

15:15-18:40

1 stop4h 25m

£176

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 5/2

06:00-13:50

1 stop6h 50m

Klagenfurt

Mon 9/2

15:15-18:40

1 stop4h 25m

£176

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Wed 11/2

06:00-13:50

1 stop6h 50m

Klagenfurt

Wed 18/2

15:15-18:40

1 stop4h 25m

£176

Flights are sorted by cheapest return flights first.

Deals found on 17/11

Showing 1-10 of 60 results
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Best time to book a flight from London to Klagenfurt

Have a flexible travel schedule? Discover the best time to fly to Klagenfurt from London 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 to Klagenfurt

How far ahead should I book a flight from London to Klagenfurt?

Use this chart to determine the optimal time to book a return flight from London to Klagenfurt. Price data was last updated on 14 November 2025.

To ensure you get the cheapest price possible for a flight from London to Klagenfurt, you should look to book at least 4 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London to Klagenfurt?

Currently, November is the cheapest month in which you can book a flight from London to Klagenfurt (average of £30). Flying from London to Klagenfurt in December is currently the most expensive (average of £175). 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.

What is the cheapest time of day to fly from LON to KLU?

Find hourly flight availability from London to Klagenfurt. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 November 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Klagenfurt as you normally would.

How much does it cost for a return flight from London to Klagenfurt?

What’s the top stopover airport for flights from London to Klagenfurt?

Share of one-stop return flights from London to Klagenfurt chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Vienna (VIE) – chosen by Cheapflights users on 98% of one-stop itineraries from London to Klagenfurt on Cheapflights.

What’s the cheapest stopover airport for flights from London to Klagenfurt?

Average return fare for one-stop flights from London to Klagenfurt, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Vienna (VIE) is the most affordable one-stop option, with an average return flight price of £184.

What’s the fastest stopover option from London to Klagenfurt?

Shortest average travel time for one-stop one-way flights from London to Klagenfurt, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Munich (MUC) have the shortest average one-way travel time for one-stop routes: 3h 50m.

Which airport typically offers the quickest stopover for flights from London to Klagenfurt?

Average stopover duration for one-stop one-way flights from London to Klagenfurt, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Vienna (VIE) offer the fastest connection on this route, with an average stopover time of 0h 50m.

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 17 November 2025.
Read through reviews of airlines operating flights from London to Klagenfurt, such as Austrian Airlines and Ryanair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.6
Good
873 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.6

Food

6.8

Entertainment

6.8

Overall

7.6

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
873 reviews
Austrian Airlines
7.6
Good
873 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.6

Food

6.8

Entertainment

6.8

Overall

7.6

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.
Ryanair
6.8
Okay
5,194 reviews
Austrian Airlines
7.6
Good
873 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.6

Food

6.8

Entertainment

6.8

Overall

7.6

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 London 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?

    Klagenfurt (KLU), located 2.0 mi from the city center, is the airport you fly into when you book flights from London to Klagenfurt. 2 airlines have flights to Klagenfurt from London on a regular basis. Booking flights from London to Klagenfurt should not be difficult; the airport handles an average of 0 inbound flights from London per day.

  • How long is the flight from London to Klagenfurt?

    Airlines like Ryanair and Austrian Airlines fly from London to Klagenfurt in about 2h 10m. The time it takes to get you to your destination can typically vary by up to 4h 40m. There are 729 mi between London and Klagenfurt. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London to Klagenfurt round-trip?

    Flying on Ryanair is currently your cheapest option to Klagenfurt, with prices starting at £42. Another option worth looking into is Austrian Airlines, starting at £159 return. You may be able to fly from London to Klagenfurt for 70% less than the average price by searching for these airlines.

  • What are the most popular routes from London to Klagenfurt?

    While some choose either London Gatwick - Klagenfurt or London Luton - Klagenfurt, London Heathrow - Klagenfurt is the most popular route from London to Klagenfurt.

  • Can I find deals for flights from London to Klagenfurt that include hotel bookings?

    Yes. In addition to deals on London to Klagenfurt flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Klagenfurt?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Klagenfurt.

  • Can I find deals for business class flights from London to Klagenfurt?

    Yes. Cheapflights offers flight deals from London 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 to Klagenfurt?

    Currently, November is the cheapest month in which you can book a flight from London to Klagenfurt (average of £30). Flying from London to Klagenfurt in December is currently the most expensive (average of £175). 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 London to Klagenfurt

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from London to Klagenfurt

Discover the top 2 airlines that operate flights from London 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 17 November 2025.
AirlineCheapestAverageFlexibilityOn-time
RyanairCheapest£42Average£122FlexibilityNo cancel feeOn-timeN/A
Search Ryanair flights
Austrian AirlinesCheapest£159Average£259FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Klagenfurt?

Cheapflights helps you search for flights from London to Klagenfurt via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from London to Klagenfurt?

Cheapflights helps you find that perfect flight to Klagenfurt from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Klagenfurt with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to Klagenfurt flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to Klagenfurt become cheaper?

Yes, Cheapflights offers price alerts on London to Klagenfurt flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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