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Cheap flights from Klagenfurt to London from £122

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Klagenfurt to London departing on 28/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Klagenfurt to London

Cheap return flights

Austrian Airlines Logo
05:45 - 08:45KLU-LHR
4h 00m1 stop
Austrian Airlines Logo
15:05 - 23:25LHR-KLU
7h 20m1 stop
£174Austrian Airlines
Find Deal
Fri, 10 Oct - Mon, 13 Oct
Austrian Airlines Logo
05:45 - 18:40KLU-LHR
13h 55m1 stop
Austrian Airlines Logo
14:50 - 23:25LHR-KLU
7h 35m1 stop
£175Austrian Airlines
Find Deal
Fri, 21 Nov - Mon, 24 Nov
Austrian Airlines Logo
05:45 - 08:45KLU-LHR
4h 00m1 stop
Austrian Airlines Logo
06:00 - 13:55LHR-KLU
6h 55m1 stop
£177Austrian Airlines
Find Deal
Thu, 23 Oct - Sun, 26 Oct
Austrian Airlines Logo
15:00 - 21:40KLU-LHR
7h 40m1 stop
Austrian Airlines Logo
09:05 - 23:25LHR-KLU
13h 20m1 stop
£177Austrian Airlines
Find Deal
Thu, 23 Oct - Tue, 28 Oct
Austrian Airlines Logo
14:50 - 21:40KLU-LHR
7h 50m1 stop
Austrian Airlines Logo
09:05 - 13:55LHR-KLU
3h 50m1 stop
£178Austrian Airlines
Find Deal
Sat, 22 Nov - Tue, 25 Nov
Austrian Airlines Logo
14:50 - 21:40KLU-LHR
7h 50m1 stop
Austrian Airlines Logo
06:00 - 13:55LHR-KLU
6h 55m1 stop
£179Austrian Airlines
Find Deal
Sat, 22 Nov - Mon, 24 Nov
Multiple Airlines Logo
05:45 - 08:45KLU-LHR
4h 00m1 stop
Multiple Airlines Logo
06:55 - 14:00LHR-KLU
6h 05m2 stops
£198Multiple Airlines
Find Deal
Fri, 10 Oct - Mon, 13 Oct
Lufthansa Logo
15:00 - 20:45KLU-LHR
6h 45m2 stops
Lufthansa Logo
07:40 - 13:55LHR-KLU
5h 15m2 stops
£219Lufthansa
Find Deal
Wed, 22 Oct - Tue, 28 Oct
Lufthansa Logo
05:45 - 13:00KLU-LHR
8h 15m2 stops
Lufthansa Logo
07:40 - 13:55LHR-KLU
5h 15m2 stops
£221Lufthansa
Find Deal
Sat, 22 Nov - Mon, 24 Nov
Lufthansa Logo
14:50 - 21:00KLU-LHR
7h 10m2 stops
Lufthansa Logo
11:10 - 23:25LHR-KLU
11h 15m2 stops
£222Lufthansa
Find Deal
Fri, 13 Mar - Mon, 16 Mar

Lufthansa flights from Klagenfurt to London Heathrow Airport

Our best Lufthansa deals on Klagenfurt to London Heathrow Airport flight tickets
Lufthansa
22 Oct
KLU15:00Klagenfurt
6h 45m
2 stops
LHR20:45London Heathrow
28 Oct
LHR07:40London Heathrow
5h 15m
2 stops
KLU13:55Klagenfurt
£219
Find similar
Lufthansa
22 Nov
KLU05:45Klagenfurt
8h 15m
2 stops
LHR13:00London Heathrow
24 Nov
LHR07:40London Heathrow
5h 15m
2 stops
KLU13:55Klagenfurt
£221
Find similar
Lufthansa
13 Mar
KLU14:50Klagenfurt
7h 10m
2 stops
LHR21:00London Heathrow
16 Mar
LHR11:10London Heathrow
11h 15m
2 stops
KLU23:25Klagenfurt
£222
Find similar

Austrian Airlines flights from Klagenfurt to London Heathrow Airport

Our best Austrian Airlines deals on Klagenfurt to London Heathrow Airport flight tickets
Austrian Airlines
10 Oct
KLU05:45Klagenfurt
4h 00m
1 stop
LHR08:45London Heathrow
13 Oct
LHR15:05London Heathrow
7h 20m
1 stop
KLU23:25Klagenfurt
£174
Find similar
Austrian Airlines
21 Nov
KLU05:45Klagenfurt
13h 55m
1 stop
LHR18:40London Heathrow
24 Nov
LHR14:50London Heathrow
7h 35m
1 stop
KLU23:25Klagenfurt
£175
Find similar
Austrian Airlines
23 Oct
KLU05:45Klagenfurt
4h 00m
1 stop
LHR08:45London Heathrow
26 Oct
LHR06:00London Heathrow
6h 55m
1 stop
KLU13:55Klagenfurt
£177
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Klagenfurt to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from Klagenfurt to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 10/10

05:45-08:45

1 stop4h 00m

London Heathrow

Mon 13/10

15:05-23:25

1 stop7h 20m

£174

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 21/11

05:45-18:40

1 stop13h 55m

London Heathrow

Mon 24/11

14:50-23:25

1 stop7h 35m

£175

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 23/10

05:45-08:45

1 stop4h 00m

London Heathrow

Sun 26/10

06:00-13:55

1 stop6h 55m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Thu 23/10

15:00-21:40

1 stop7h 40m

London Heathrow

Tue 28/10

09:05-23:25

1 stop13h 20m

£177

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 22/11

14:50-21:40

1 stop7h 50m

London Heathrow

Tue 25/11

09:05-13:55

1 stop3h 50m

£178

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 22/11

14:50-21:40

1 stop7h 50m

London Heathrow

Mon 24/11

06:00-13:55

1 stop6h 55m

£179

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 10/10

05:45-08:45

1 stop4h 00m

London Heathrow

Mon 13/10

06:55-14:00

2 stops6h 05m

£198

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Wed 22/10

15:00-20:45

2 stops6h 45m

London Heathrow

Tue 28/10

07:40-13:55

2 stops5h 15m

£219

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Sat 22/11

05:45-13:00

2 stops8h 15m

London Heathrow

Mon 24/11

07:40-13:55

2 stops5h 15m

£221

KlagenfurtLondon

KLU - LHR

KLULHR

Klagenfurt

Fri 13/3

14:50-21:00

2 stops7h 10m

London Heathrow

Mon 16/3

11:10-23:25

2 stops11h 15m

£222

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Klagenfurt to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, January is the cheapest month to fly from Klagenfurt to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £152. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Klagenfurt averaging around £169.

When to book flights from Klagenfurt to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Klagenfurt to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Klagenfurt to London Heathrow Airport (KLU to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Klagenfurt to London Heathrow Airport

Direct flights

None
There are no direct flights from Klagenfurt to London Heathrow Airport. There are no popular flight routes from Klagenfurt to London Heathrow Airport.
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  • How far is Klagenfurt to London Heathrow by plane?

    The distance between Klagenfurt and London Heathrow is about 745.3 mi. Typically, this will take 4h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from Klagenfurt Airport to London Heathrow Airport?

    Prices for flights from Klagenfurt Airport to London Heathrow Airport were last updated today.

  • How old do you have to be to fly from Klagenfurt Airport to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Klagenfurt Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Guildford
Swanage
Poole
Colchester
Worthing
Salisbury
Chelmsford

Why use momondo?

Why should I use momondo to find a flight deal from Klagenfurt to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Klagenfurt.

Can I find flights from Klagenfurt to London with flexible booking policies on momondo?

Flights from Klagenfurt to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Klagenfurt to London?

Once all potential Klagenfurt to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Klagenfurt to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Klagenfurt to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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