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Cheap flights from Klagenfurt to London Heathrow Airport from £148

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 18/8. Fares are subject to change and may not be available on all flights or dates of travel.
KLU — LHR
30 Mar — 6 Apr1
1 adult

Cheap flight deals from Klagenfurt to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Klagenfurt (KLU) to Heathrow (LHR). 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 25 March 2025.

Round-trip from

£166

One-way from

£148

Popular in

December

Cheapest in

January

Average price

£179
Austrian Airlines
  • Austrian Airlines
  • 16/9-21/9
  • 2 total stops
  • 34h 45m total
  • Klagenfurt to London
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Eurowings
  • Eurowings
  • 18/8
  • 1 total stop
  • 18h 40m total
  • Klagenfurt to London
Search Deals
High demand for flights, 4% potential price rise
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Cheapest flight prices on average. 3% potential price decrease (£7 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Find flight deals from Klagenfurt to Heathrow

Cheapest flights from Klagenfurt to Heathrow
Explore the most affordable flight options available from Klagenfurt to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2025.

Tue 16/915:00KLU - LHR
1 stop18h 20mAustrian Airlines
Sun 21/906:00LHR - KLU
1 stop16h 25mAustrian Airlines
Deal found 24/3£166
Wed 7/515:00KLU - LHR
2 stops6h 45mMultiple Airlines
Sun 11/506:00LHR - KLU
1 stop16h 25mMultiple Airlines
Deal found 24/3£193
Thu 12/615:00KLU - LHR
2 stops8h 10mLufthansa
Sun 15/608:30LHR - KLU
2 stops28h 30mLufthansa
Deal found 25/3£220

Cheapflights Fare Finder

Customise your flight search to find flights from Klagenfurt to Heathrow 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 25 March 2025.
Use the filters below to find and compare flights from Klagenfurt to London Heathrow Airport that are best for you.

Fly from

Klagenfurt

Fly to

Heathrow

Route

Depart

Return

Price

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Tue 16/9

15:00-08:20

1 stop18h 20m

London Heathrow

Sun 21/9

06:00-23:25

1 stop16h 25m

£166

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Wed 7/5

15:00-20:45

2 stops6h 45m

London Heathrow

Sun 11/5

06:00-23:25

1 stop16h 25m

£193

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 12/6

15:00-22:10

2 stops8h 10m

London Heathrow

Sun 15/6

08:30-14:00

2 stops28h 30m

£220

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Mon 18/8

14:30-08:10

1 stop18h 40m

£148

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Tue 19/8

15:00-08:20

1 stop18h 20m

£162

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Tue 19/8

15:00-20:45

2 stops6h 45m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 17/4

14:55-08:00

2 stops18h 05m

£182

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Best time to book a flight from Klagenfurt to Heathrow

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

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

Currently, January is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £112). Flying from Klagenfurt to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 25 March 2025.
See what other customers who have flown with Austrian Airlines, Lufthansa and Eurowings from Klagenfurt to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Austrian Airlines
7.5
Good
769 reviews
Check prices

Comfort

7.3

Food

6.8

Overall

7.5

Entertainment

6.7

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Austrian Airlines
7.5
Good
769 reviews
Austrian Airlines
7.5
Good
769 reviews
Check prices

Comfort

7.3

Food

6.8

Overall

7.5

Entertainment

6.7

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Lufthansa
6.7
Okay
6,949 reviews
Austrian Airlines
7.5
Good
769 reviews
Check prices

Comfort

7.3

Food

6.8

Overall

7.5

Entertainment

6.7

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Eurowings
6.6
Okay
274 reviews
Austrian Airlines
7.5
Good
769 reviews
Check prices

Comfort

7.3

Food

6.8

Overall

7.5

Entertainment

6.7

Boarding

7.6

Crew

8.1

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.

Related info for your journey

Find useful and relevant information for your journey from Klagenfurt to Heathrow. 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 from for flights from Klagenfurt to London Heathrow?

    Klagenfurt (KLU) is the airport you will fly out of if you book a flight from Klagenfurt to London Heathrow. You should not have trouble finding flights to London Heathrow from Klagenfurt; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Klagenfurt airport to London Heathrow. It is only a 2.0 mi journey to Klagenfurt (KLU) from Klagenfurt’s city center.

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

    Austrian Airlines, at £166, was found to be the cheapest airline from Klagenfurt to London Heathrow Airport. An alternate airline flying to your destination would be Lufthansa. These flights start at 26% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Klagenfurt to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with Eurowings, which is currently one of the cheapest options available, starting at £148. Austrian Airlines flights start at £162 while deals on Lufthansa start at £179 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Klagenfurt to Heathrow 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 Klagenfurt to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Klagenfurt to London Heathrow Airport (average of £112). Flying from Klagenfurt to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near Klagenfurt?

Book flights to Klagenfurt if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Northampton
Swindon
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall

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Alternative routes for Klagenfurt to Heathrow

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

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

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

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

Yes! Cheapflights helps users easily find flights from Klagenfurt to Heathrow with no change fees.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from Klagenfurt today and book when prices fit your budget.

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