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Cheap flights from Southeast Europe to London from £37

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 30/3. 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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Find the cheapest flights from Southeast Europe to London

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
08:05 - 10:00
OTP
-
LHR
3h 55mdirect
British Airways Logo
18:10 - 23:25
LHR
-
OTP
3h 15mdirect
£91British Airways
Sat, 14 Mar - Sat, 14 Mar
British Airways Logo
20:20 - 21:50
OTP
-
LHR
3h 30mdirect
British Airways Logo
09:50 - 15:05
LHR
-
OTP
3h 15mdirect
£101British Airways
Fri, 6 Mar - Sun, 15 Mar
Aegean Airlines Logo
16:00 - 17:55
ATH
-
LHR
3h 55mdirect
Aegean Airlines Logo
22:15 - 03:50
LHR
-
ATH
3h 35mdirect
£113Aegean Airlines
Thu, 26 Mar - Thu, 26 Mar
Lufthansa Logo
14:30 - 22:55
SBZ
-
LHR
10h 25m
1 stop
Lufthansa Logo
16:40 - 00:50
LHR
-
SBZ
6h 10m
1 stop
£119Lufthansa
Fri, 27 Feb - Mon, 2 Mar
Aegean Airlines Logo
19:10 - 21:15
ATH
-
LHR
4h 05mdirect
Aegean Airlines Logo
22:15 - 03:50
LHR
-
ATH
3h 35mdirect
£123Aegean Airlines
Mon, 16 Feb - Sun, 22 Feb
LOT Logo
18:00 - 22:00
CLJ
-
LHR
6h 00m
1 stop
LOT Logo
06:30 - 17:20
LHR
-
CLJ
8h 50m
1 stop
£124LOT
Thu, 5 Mar - Mon, 9 Mar
Air Serbia Logo
05:00 - 12:20
SOF
-
LHR
9h 20m
1 stop
Air Serbia Logo
13:20 - 03:05
LHR
-
SOF
11h 45m
1 stop
£125Air Serbia
Sat, 7 Mar - Wed, 11 Mar
Air Serbia Logo
05:00 - 12:20
SOF
-
LHR
9h 20m
1 stop
Air Serbia Logo
13:20 - 15:30
LHR
-
SOF
24h 10m
1 stop
£126Air Serbia
Thu, 26 Feb - Sat, 7 Mar
LOT Logo
18:00 - 09:35
CLJ
-
LHR
17h 35m
1 stop
LOT Logo
10:25 - 17:20
LHR
-
CLJ
4h 55m
1 stop
£127LOT
Thu, 5 Mar - Mon, 9 Mar
Lufthansa Logo
06:00 - 10:45
SBZ
-
LHR
6h 45m
2 stops
Lufthansa Logo
17:50 - 00:50
LHR
-
SBZ
5h 00m
1 stop
£151Lufthansa
Fri, 27 Feb - Mon, 2 Mar

British Airways flights from Southeast Europe to London Heathrow Airport

Our best British Airways deals on Southeast Europe to London Heathrow Airport flight tickets
British Airways
14 Mar
OTP08:05Bucharest Otopeni Intl
3h 55m
LHR10:00London Heathrow
14 Mar
LHR18:10London Heathrow
3h 15m
OTP23:25Bucharest Otopeni Intl
£91
British Airways
6 Mar
OTP20:20Bucharest Otopeni Intl
3h 30m
LHR21:50London Heathrow
15 Mar
LHR09:50London Heathrow
3h 15m
OTP15:05Bucharest Otopeni Intl
£101
British Airways
26 Feb
OTP08:00Bucharest Otopeni Intl
3h 50m
LHR09:50London Heathrow
4 Mar
LHR17:40London Heathrow
3h 15m
OTP22:55Bucharest Otopeni Intl
£102

Lufthansa flights from Southeast Europe to London Heathrow Airport

Our best Lufthansa deals on Southeast Europe to London Heathrow Airport flight tickets
Lufthansa
19 Mar
SBZ06:00Sibiu
15h 35m
1 stop
LHR19:35London Heathrow
26 Mar
LHR08:45London Heathrow
14h 15m
1 stop
SBZ01:00Sibiu
£117
Lufthansa
27 Feb
SBZ14:30Sibiu
10h 25m
1 stop
LHR22:55London Heathrow
2 Mar
LHR16:40London Heathrow
6h 10m
1 stop
SBZ00:50Sibiu
£119
Lufthansa
8 Mar
SOF06:05Sofia
6h 20m
1 stop
LHR10:25London Heathrow
15 Mar
LHR08:45London Heathrow
12h 00m
1 stop
SOF22:45Sofia
£149

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 February 2026.
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

Sat 14/3

08:05-10:00

Nonstop3h 55m

London Heathrow

Sat 14/3

18:10-23:25

Nonstop3h 15m

£91

BucharestLondon

OTP - LHR

OTPLHR

Bucharest Otopeni Intl

Fri 6/3

20:20-21:50

Nonstop3h 30m

London Heathrow

Sun 15/3

09:50-15:05

Nonstop3h 15m

£101

AthensLondon

ATH - LHR

ATHLHR

Athens Eleftherios V.

Thu 26/3

16:00-17:55

Nonstop3h 55m

London Heathrow

Thu 26/3

22:15-03:50

Nonstop3h 35m

£113

SibiuLondon

SBZ - LHR

SBZLHR

Sibiu

Fri 27/2

14:30-22:55

1 stop10h 25m

London Heathrow

Mon 2/3

16:40-00:50

1 stop6h 10m

£119

AthensLondon

ATH - LHR

ATHLHR

Athens Eleftherios V.

Mon 16/2

19:10-21:15

Nonstop4h 05m

London Heathrow

Sun 22/2

22:15-03:50

Nonstop3h 35m

£123

Cluj NapocaLondon

CLJ - LHR

CLJLHR

Cluj Napoca

Thu 5/3

18:00-22:00

1 stop6h 00m

London Heathrow

Mon 9/3

06:30-17:20

1 stop8h 50m

£124

SofiaLondon

SOF - LHR

SOFLHR

Sofia

Sat 7/3

05:00-12:20

1 stop9h 20m

London Heathrow

Wed 11/3

13:20-03:05

1 stop11h 45m

£125

SofiaLondon

SOF - LHR

SOFLHR

Sofia

Thu 26/2

05:00-12:20

1 stop9h 20m

London Heathrow

Sat 7/3

13:20-15:30

1 stop24h 10m

£126

Cluj NapocaLondon

CLJ - LHR

CLJLHR

Cluj Napoca

Thu 5/3

18:00-09:35

1 stop17h 35m

London Heathrow

Mon 9/3

10:25-17:20

1 stop4h 55m

£127

SibiuLondon

SBZ - LHR

SBZLHR

Sibiu

Fri 27/2

06:00-10:45

2 stops6h 45m

London Heathrow

Mon 2/3

17:50-00:50

1 stop5h 00m

£151

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, January 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 £112. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Southeast Europe averaging around £130.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as £117. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £207.

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 £148. 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 £194 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 £164 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 £105 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

Fastest flight time

2h 20m

Direct flights

Every day
The fastest flight from Southeast Europe to London Heathrow Airport takes 2h 20m
Direct flights go from Southeast Europe to London Heathrow Airport every day.
Search flight deals

  • 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
Air SerbiaPriceFrom £42Free CancellationRating
6.1
214 reviews
Search Air Serbia flights
Aegean AirlinesPriceFrom £84Free CancellationRating
8.1
850 reviews
Search Aegean Airlines flights
British AirwaysPriceFrom £88Free CancellationRating
6.7
7,716 reviews
Search British Airways flights
Bulgaria AirPriceFrom £95Free CancellationRating
8.4
58 reviews
Search Bulgaria Air flights
LOTPriceFrom £123Free CancellationRating
7.5
1,179 reviews
Search LOT flights
LufthansaPriceFrom £270Free CancellationRating
6.8
7,762 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
Gatwick
Maidstone
Slough
Northampton
Stratford-upon-Avon
Swindon
Southend-on-Sea
Canterbury
Ipswich
Ilford
Poole
Guildford
Chelmsford
Hayes
Dover
Swanage
Folkestone

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.

An easier way to manage your London Heathrow Airport trip

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