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Cheap flights from Southeast Europe to London from £31

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Southeast Europe to London departing on 12/12. 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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Cheap return flights

British Airways Logo
20:25 - 21:55OTP-LHR
3h 30mdirect
British Airways Logo
17:40 - 22:55LHR-OTP
3h 15mdirect
£75British Airways
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Mon, 22 Dec - Wed, 31 Dec
British Airways Logo
08:05 - 09:55OTP-LHR
3h 50mdirect
British Airways Logo
18:10 - 23:25LHR-OTP
3h 15mdirect
£81British Airways
Find Deal
Wed, 3 Dec - Sat, 6 Dec
Aegean Airlines Logo
16:00 - 17:55ATH-LHR
3h 55mdirect
Aegean Airlines Logo
16:35 - 22:20LHR-ATH
3h 45mdirect
£120Aegean Airlines
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Tue, 13 Jan - Thu, 15 Jan
Aegean Airlines Logo
19:10 - 21:15ATH-LHR
4h 05mdirect
Aegean Airlines Logo
22:15 - 03:50LHR-ATH
3h 35mdirect
£124Aegean Airlines
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Mon, 17 Nov - Wed, 19 Nov
Air Serbia Logo
16:10 - 12:30SKG-LHR
22h 20m1 stop
Air Serbia Logo
13:30 - 03:10LHR-SKG
11h 40m1 stop
£141Air Serbia
Find Deal
Wed, 1 Oct - Sun, 5 Oct
Air Serbia Logo
04:00 - 12:30TIA-LHR
9h 30m1 stop
Air Serbia Logo
19:55 - 14:20LHR-TIA
17h 25m1 stop
£144Air Serbia
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Wed, 1 Oct - Sat, 4 Oct
Lufthansa Logo
19:25 - 22:40SOF-LHR
5h 15m1 stop
Lufthansa Logo
09:00 - 18:40LHR-SOF
7h 40m1 stop
£154Lufthansa
Find Deal
Wed, 1 Oct - Thu, 16 Oct
Lufthansa Logo
14:05 - 18:25TSR-LHR
6h 20m1 stop
Lufthansa Logo
11:10 - 17:45LHR-TSR
4h 35m1 stop
£154Lufthansa
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Sat, 25 Oct - Fri, 31 Oct
Bulgaria Air Logo
06:25 - 08:05SOF-LHR
3h 40mdirect
Bulgaria Air Logo
08:55 - 14:05LHR-SOF
3h 10mdirect
£187Bulgaria Air
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Sat, 13 Sep - Sun, 19 Oct
Bulgaria Air Logo
06:25 - 08:05SOF-LHR
3h 40mdirect
Bulgaria Air Logo
08:55 - 14:05LHR-SOF
3h 10mdirect
£187Bulgaria Air
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Sat, 27 Sep - Sun, 5 Oct

KLM flights from Southeast Europe to London Heathrow Airport

Our best KLM deals on Southeast Europe to London Heathrow Airport flight tickets
KLM
21 Nov
ATH13:45Athens Eleftherios V.
7h 30m
1 stop
LHR19:15London Heathrow
27 Nov
LHR08:40London Heathrow
5h 55m
1 stop
ATH16:35Athens Eleftherios V.
£164
Find similar
KLM
18 Nov
LJU12:50Ljubljana Joze Pucnik
5h 10m
1 stop
LHR17:00London Heathrow
21 Nov
LHR20:25London Heathrow
14h 55m
1 stop
LJU12:20Ljubljana Joze Pucnik
£166
Find similar
KLM
8 Aug
CLJ09:05Cluj Napoca
10h 30m
2 stops
LHR17:35London Heathrow
13 Aug
LHR06:30London Heathrow
10h 45m
2 stops
CLJ19:15Cluj Napoca
£403
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Turkish Airlines flights from Southeast Europe to London Heathrow Airport

Our best Turkish Airlines deals on Southeast Europe to London Heathrow Airport flight tickets
Turkish Airlines
17 Sept
SKG09:35Thessaloniki Makedonia
9h 05m
1 stop
LHR16:40London Heathrow
24 Sept
LHR18:20London Heathrow
12h 25m
1 stop
SKG08:45Thessaloniki Makedonia
£202
Find similar
Turkish Airlines
12 Aug
LJU09:25Ljubljana Joze Pucnik
7h 35m
1 stop
LHR16:00London Heathrow
12 Aug
LHR18:00London Heathrow
13h 30m
1 stop
LJU08:30Ljubljana Joze Pucnik
£309
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momondo Fare Finder

 
Customise your flight search to find flights from Southeast Europe 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 6 August 2025.
Use the filters below to find and compare flights from Southeast Europe to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BucharestLondon

OTP - LHR

OTPLHR

Bucharest Otopeni Intl

Mon 22/12

20:25-21:55

Nonstop3h 30m

London Heathrow

Wed 31/12

17:40-22:55

Nonstop3h 15m

£75

BucharestLondon

OTP - LHR

OTPLHR

Bucharest Otopeni Intl

Wed 3/12

08:05-09:55

Nonstop3h 50m

London Heathrow

Sat 6/12

18:10-23:25

Nonstop3h 15m

£81

AthensLondon

ATH - LHR

ATHLHR

Athens Eleftherios V.

Tue 13/1

16:00-17:55

Nonstop3h 55m

London Heathrow

Thu 15/1

16:35-22:20

Nonstop3h 45m

£120

AthensLondon

ATH - LHR

ATHLHR

Athens Eleftherios V.

Mon 17/11

19:10-21:15

Nonstop4h 05m

London Heathrow

Wed 19/11

22:15-03:50

Nonstop3h 35m

£124

ThessalonikiLondon

SKG - LHR

SKGLHR

Thessaloniki Makedonia

Wed 1/10

16:10-12:30

1 stop22h 20m

London Heathrow

Sun 5/10

13:30-03:10

1 stop11h 40m

£141

TiranaLondon

TIA - LHR

TIALHR

Tirana Rinas

Wed 1/10

04:00-12:30

1 stop9h 30m

London Heathrow

Sat 4/10

19:55-14:20

1 stop17h 25m

£144

SofiaLondon

SOF - LHR

SOFLHR

Sofia

Wed 1/10

19:25-22:40

1 stop5h 15m

London Heathrow

Thu 16/10

09:00-18:40

1 stop7h 40m

£154

TimisoaraLondon

TSR - LHR

TSRLHR

Timisoara

Sat 25/10

14:05-18:25

1 stop6h 20m

London Heathrow

Fri 31/10

11:10-17:45

1 stop4h 35m

£154

SofiaLondon

SOF - LHR

SOFLHR

Sofia

Sat 13/9

06:25-08:05

Nonstop3h 40m

London Heathrow

Sun 19/10

08:55-14:05

Nonstop3h 10m

£187

SofiaLondon

SOF - LHR

SOFLHR

Sofia

Sat 27/9

06:25-08:05

Nonstop3h 40m

London Heathrow

Sun 5/10

08:55-14:05

Nonstop3h 10m

£187

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Southeast Europe 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, February is the cheapest month to fly from Southeast Europe to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £116. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from Southeast Europe averaging around £139.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Southeast Europe is on a Monday. momondo users have found tickets for Monday departures for as low as £156. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £194.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Southeast Europe to London Heathrow Airport in the evening for as low as £136. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £204 on average. Flights to London Heathrow Airport from Southeast Europe in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Southeast Europe to London Heathrow flight route?

Fly from Bucharest Otopeni Intl to London Heathrow for the best Southeast Europe - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Southeast Europe when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £160 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Southeast Europe for as low as £101 on momondo.

What cabin class options are available on Southeast Europe to London Heathrow flights?

There are 3 cabin classes available to choose from on Southeast Europe to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Southeast Europe to London Heathrow Airport flights?

No. A direct flight is the cheapest option for a flight between Southeast Europe to London Heathrow Airport.

Cheap Southeast Europe to London Heathrow Airport flight deals and tips

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

Best price found

£31

Fastest flight time

2h 20m

Direct flights

Mon, Thu, Fri, Sat and Sun
The best one-way flight to London Heathrow Airport from Southeast Europe in the past 72 hours is £31. The best return flight deal from Southeast Europe to London Heathrow Airport found on momondo in the last 72 hours is £75.
The fastest flight from Southeast Europe to London Heathrow Airport takes 2h 20m
Direct flights go from Southeast Europe to London Heathrow Airport on Monday, Thursday, Friday, Saturday and Sunday. Airlines offering direct flights are: Croatia Airlines and British Airways..
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  • When did momondo last update prices for flights from Southeast Europe to London Heathrow Airport?

    Prices for flights from Southeast Europe to London Heathrow Airport refresh daily.

  • How many operators does momondo search for flights from Southeast Europe to London Heathrow Airport?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Southeast Europe to London Heathrow Airport.

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

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Southeast Europe to London Heathrow Airport?

Best airlines flying from Southeast Europe to London Heathrow Airport

Compare and see reviews for airlines that fly from Southeast Europe to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Wizz AirPriceFrom £55Free CancellationRating
6.8
1,057 reviews
Search Wizz Air flights
Bulgaria AirPriceFrom £90Free CancellationRating
8.0
58 reviews
Search Bulgaria Air flights
British AirwaysPriceFrom £92Free CancellationRating
6.6
7,237 reviews
Search British Airways flights
Air SerbiaPriceFrom £93Free CancellationRating
6.3
197 reviews
Search Air Serbia flights
LOTPriceFrom £126Free CancellationRating
7.6
1,102 reviews
Search LOT flights
Aegean AirlinesPriceFrom £134Free CancellationRating
8.1
782 reviews
Search Aegean Airlines flights
LufthansaPriceFrom £154Free CancellationRating
6.8
7,287 reviews
Search Lufthansa flights

Travelling to a place near London?

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

Why use momondo?

Why should I use momondo to find a flight deal from Southeast Europe 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 Southeast Europe.

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

Flights from Southeast Europe 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 Southeast Europe to London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Southeast Europe to London.

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

Price alerts on flights to London from Southeast Europe are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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