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 £157, 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.

In terms of precipitation, rainfall in Klagenfurt ranges from 40.0 - 110.0 inches per month. June is typically the wettest month, when rainfall can reach 110.0 mm. January is typically the driest time to visit Klagenfurt when rainfall is around 40.0 mm.

If weather is an important factor for your trip to Klagenfurt, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -4.0 C).

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

When flying from London Heathrow Airport to Klagenfurt, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

£136+ Flights from London Heathrow Airport to Klagenfurt

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 5 December 2025.

Mon 29/1206:00LHR - KLU

1 stop6h 50mAustrian Airlines

Fri 2/115:15KLU - LHR

1 stop7h 25mAustrian Airlines

Deal found 3/12£375

Mon 29/1206:35LHR - KLU

2 stops6h 15mMultiple Airlines

Fri 2/115:15KLU - LHR

1 stop7h 25mMultiple Airlines

Deal found 3/12£415

Mon 29/1206:35LHR - KLU

2 stops6h 15mLufthansa

Fri 2/115:15KLU - LHR

2 stops6h 35mLufthansa

Deal found 3/12£473

Best flights from Heathrow to Klagenfurt
Discover carefully curated flight deals from Heathrow to Klagenfurt that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.

Sat 17/106:00LHR - KLU

1 stop3h 30mAustrian Airlines

Sat 31/116:00KLU - LHR

1 stop17h 20mAustrian Airlines

Deal found 3/12£166

Mon 19/107:40LHR - KLU

2 stops5h 10mMultiple Airlines

Mon 26/115:15KLU - LHR

1 stop4h 25mMultiple Airlines

Deal found 4/12£182

Mon 19/107:40LHR - KLU

2 stops5h 10mLufthansa

Mon 26/115:15KLU - LHR

2 stops8h 40mLufthansa

Deal found 4/12£197

Mon 19/109:05LHR - KLU

1 stop3h 45mAustrian Airlines

Mon 26/115:15KLU - LHR

1 stop4h 25mAustrian Airlines

Deal found 4/12£169

Mon 19/107:40LHR - KLU

2 stops5h 10mMultiple Airlines

Sat 31/116:00KLU - LHR

1 stop17h 20mMultiple Airlines

Deal found 4/12£187

Mon 19/109:05LHR - KLU

1 stop3h 45mAustrian Airlines

Sat 31/116:00KLU - LHR

1 stop17h 20mAustrian Airlines

Deal found 4/12£172

Sat 17/106:00LHR - KLU

1 stop3h 30mMultiple Airlines

Sat 31/116:00KLU - LHR

2 stops22h 00mMultiple Airlines

Deal found 3/12£188

Thu 7/506:00LHR - KLU

1 stop7h 00mAustrian Airlines

Sun 10/515:00KLU - LHR

1 stop18h 20mAustrian Airlines

Deal found 3/12£184

Sat 10/106:00LHR - KLU

1 stop3h 30mMultiple Airlines

Mon 12/115:15KLU - LHR

2 stops20h 10mMultiple Airlines

Deal found 4/12£195

Thu 7/507:25LHR - KLU

2 stops5h 35mMultiple Airlines

Sun 10/515:00KLU - LHR

1 stop18h 20mMultiple Airlines

Deal found 3/12£196

Sat 17/120:15LHR - KLU

2 stops16h 35mMultiple Airlines

Mon 19/115:15KLU - LHR

1 stop7h 25mMultiple Airlines

Deal found 4/12£196

Last-minute flights from Heathrow to Klagenfurt
Discover last-minute flight deals from Heathrow to Klagenfurt. Data last updated 5 December 2025 and is based on user searches.

Sat 10/106:00LHR - KLU

1 stop3h 30mMultiple Airlines

Mon 12/115:15KLU - LHR

2 stops20h 10mMultiple Airlines

Deal found 4/12£195

Sat 10/120:15LHR - KLU

2 stops16h 35mLufthansa

Mon 12/115:15KLU - LHR

2 stops6h 45mLufthansa

Deal found 4/12£211

Sat 17/106:00LHR - KLU

1 stop3h 30mAustrian Airlines

Sat 31/116:00KLU - LHR

1 stop17h 20mAustrian Airlines

Deal found 3/12£166

Sat 17/106:00LHR - KLU

1 stop3h 30mMultiple Airlines

Sat 31/116:00KLU - LHR

2 stops22h 00mMultiple Airlines

Deal found 3/12£188

Sat 17/120:15LHR - KLU

2 stops16h 35mMultiple Airlines

Mon 19/115:15KLU - LHR

1 stop7h 25mMultiple Airlines

Deal found 4/12£196

Sat 17/113:50LHR - KLU

2 stops23h 00mLufthansa

Sat 31/116:00KLU - LHR

2 stops22h 00mLufthansa

Deal found 3/12£202

Mon 19/109:05LHR - KLU

1 stop3h 45mAustrian Airlines

Mon 26/115:15KLU - LHR

1 stop4h 25mAustrian Airlines

Deal found 4/12£169

Mon 19/109:05LHR - KLU

1 stop3h 45mAustrian Airlines

Sat 31/116:00KLU - LHR

1 stop17h 20mAustrian Airlines

Deal found 4/12£172

Mon 19/107:40LHR - KLU

2 stops5h 10mMultiple Airlines

Mon 26/115:15KLU - LHR

1 stop4h 25mMultiple Airlines

Deal found 4/12£182

Mon 19/107:40LHR - KLU

2 stops5h 10mMultiple Airlines

Sat 31/116:00KLU - LHR

1 stop17h 20mMultiple Airlines

Deal found 4/12£187

Mon 19/107:40LHR - KLU

2 stops5h 10mLufthansa

Mon 26/115:15KLU - LHR

2 stops8h 40mLufthansa

Deal found 4/12£197

One-way flights from Heathrow to Klagenfurt
Search for one-way flight options from Heathrow to Klagenfurt. Find affordable one-way fares based on user searches. Data last updated 5 December 2025.

Sun 18/106:00LHR - KLU

1 stop6h 50mAustrian Airlines

Deal found 4/12£136

Sun 18/107:40LHR - KLU

2 stops5h 10mLufthansa

Deal found 4/12£147

Sat 21/218:20LHR - KLU

2 stops28h 00mMultiple Airlines

Deal found 4/12£182

Fri 19/1209:45LHR - KLU

2 stops12h 40mMultiple Airlines

Deal found 4/12£251

Sun 18/117:50LHR - KLU

3 stops19h 00mMultiple Airlines

Deal found 4/12£263

Tue 23/1206:35LHR - KLU

2 stops6h 15mLufthansa

Deal found 3/12£283

Wed 17/1209:55LHR - KLU

2 stops12h 30mMultiple Airlines

Deal found 3/12£289

Thu 18/1207:30LHR - KLU

2 stops14h 55mLufthansa

Deal found 3/12£299

Sat 20/1208:50LHR - KLU

1 stop5h 25mMultiple Airlines

Deal found 3/12£338

Tue 23/1209:05LHR - KLU

1 stop3h 45mAustrian Airlines

Deal found 3/12£366

Find flight deals from Heathrow to Klagenfurt

Round-trip from	£166
One-way from	£136
Popular in	May
Cheapest in	January
Average price	£277

Austrian Airlines
17/1-31/1
2 total stops
20h 50m total
London to Klagenfurt

Search Deals

Austrian Airlines
18/1
1 total stop
6h 50m total
London to Klagenfurt

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£15 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 December 2025

Search Deals

Cheapflights Fare Finder

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

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 17/1

06:00-10:30

1 stop3h 30m

Klagenfurt

Sat 31/1

16:00-08:20

1 stop17h 20m

£166

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 19/1

09:05-13:50

1 stop3h 45m

Klagenfurt

Mon 26/1

15:15-18:40

1 stop4h 25m

£169

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 19/1

09:05-13:50

1 stop3h 45m

Klagenfurt

Sat 31/1

16:00-08:20

1 stop17h 20m

£172

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 19/1

07:40-13:50

2 stops5h 10m

Klagenfurt

Mon 26/1

15:15-18:40

1 stop4h 25m

£182

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 7/5

06:00-14:00

1 stop7h 00m

Klagenfurt

Sun 10/5

15:00-08:20

1 stop18h 20m

£184

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Mon 19/1

07:40-13:50

2 stops5h 10m

Klagenfurt

Sat 31/1

16:00-08:20

1 stop17h 20m

£187

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 17/1

06:00-10:30

1 stop3h 30m

Klagenfurt

Sat 31/1

16:00-13:00

2 stops22h 00m

£188

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 10/1

06:00-10:30

1 stop3h 30m

Klagenfurt

Mon 12/1

15:15-10:25

2 stops20h 10m

£195

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Thu 7/5

07:25-14:00

2 stops5h 35m

Klagenfurt

Sun 10/5

15:00-08:20

1 stop18h 20m

£196

LondonKlagenfurt

LHR - KLU

LHRKLU

London Heathrow

Sat 17/1

20:15-13:50

2 stops16h 35m

Klagenfurt

Mon 19/1

15:15-21:40

1 stop7h 25m

£196

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 21 results

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 May is currently the most expensive (average of £318). 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

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

875 reviews

Check prices

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

875 reviews

Austrian Airlines

7.6

Good

875 reviews

Check prices

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

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 £157, 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 £145). Flying from London Heathrow Airport to Klagenfurt in May is currently the most expensive (average of £318). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Heathrow to Klagenfurt

Heathrow to Vienna flights

Stansted to Vienna flights

Luton to Vienna flights

London City to Vienna flights

Gatwick to Vienna flights

Gatwick to Salzburg flights

Gatwick to Innsbruck flights

Heathrow to Innsbruck flights

Luton to Innsbruck flights

Southend to Vienna flights

London City to Salzburg flights

Stansted to Salzburg flights

Stansted to Innsbruck flights

Heathrow to Salzburg flights

Luton to Salzburg flights

London City to Innsbruck flights

Heathrow to Graz flights

Southend to Salzburg flights

Southend to Innsbruck flights

Stansted to Graz flights

London City to Graz flights

Gatwick to Graz flights

Luton to Graz flights

Stansted to Klagenfurt flights

Luton to Klagenfurt flights

London City to Klagenfurt flights

Gatwick to Klagenfurt flights

Luton to Linz flights

Stansted to Linz flights

Gatwick to Linz flights

London City to Linz flights

Heathrow to Linz flights

Top airline flying from Heathrow to Klagenfurt

Airline	Cheapest	Average	Flexibility	On-time
Austrian Airlines	Cheapest£157	Average£256	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Klagenfurt from Heathrow today with Cheapflights!

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Klagenfurt from £136

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 18/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Klagenfurt

Cheapest flights from Heathrow to KlagenfurtExplore 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 5 December 2025.

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 5 December 2025.

Find flight deals from Heathrow to Klagenfurt

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Klagenfurt that are best for you.

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.

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?

Reviews of airlines servicing Klagenfurt

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.

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?

How long is the flight from London Heathrow Airport to Klagenfurt?

What is the cheapest airline to fly from London Heathrow Airport to Klagenfurt round-trip?

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

How can I find direct flights from Heathrow to Klagenfurt?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Klagenfurt

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Heathrow to Klagenfurt

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 Heathrow to Klagenfurt?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 5 December 2025.