£54 Find Cheap Flights from Southeast Europe to London Heathrow Airport – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Flight Deals
Useful Info
Flight Deals

Cheap Flights from Southeast Europe to Heathrow

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Southeast Europe to Heathrow

Sat, 21 Nov - Sun, 29 Nov
British Airways Logo
16:10 - 17:40OTP  Bucharest Otopeni Intl-LHR London Heathrow
3h 30mdirect
British Airways Logo
18:50 - 00:05LHR  London Heathrow-OTP Bucharest Otopeni Intl
3h 15mdirect
£104British Airways
Tue, 17 Nov - Tue, 24 Nov
British Airways Logo
16:25 - 17:55OTP  Bucharest Otopeni Intl-LHR London Heathrow
3h 30mdirect
British Airways Logo
18:50 - 00:05LHR  London Heathrow-OTP Bucharest Otopeni Intl
3h 15mdirect
£104British Airways
Wed, 7 Oct - Wed, 14 Oct
Multiple Airlines Logo
21:40 - 09:10SOF  Sofia-LHR London Heathrow
13h 30m1 stop Barcelona-El Prat
Multiple Airlines Logo
20:50 - 09:45LHR  London Heathrow-SOF Sofia
10h 55m1 stop Barcelona-El Prat
£113Multiple Airlines
Wed, 7 Oct - Wed, 14 Oct
Multiple Airlines Logo
21:40 - 09:10SOF  Sofia-LHR London Heathrow
13h 30m1 stop Barcelona-El Prat
Multiple Airlines Logo
20:50 - 09:45LHR  London Heathrow-SOF Sofia
10h 55m1 stop Barcelona-El Prat
£117Multiple Airlines
Tue, 26 Jan - Fri, 29 Jan
Aegean Airlines Logo
16:00 - 17:55ATH  Athens Eleftherios V.-LHR London Heathrow
3h 55mdirect
Aegean Airlines Logo
19:00 - 00:35LHR  London Heathrow-ATH Athens Eleftherios V.
3h 35mdirect
£123Aegean Airlines
Tue, 26 Jan - Fri, 29 Jan
Aegean Airlines Logo
19:10 - 21:15ATH  Athens Eleftherios V.-LHR London Heathrow
4h 05mdirect
Aegean Airlines Logo
19:00 - 00:35LHR  London Heathrow-ATH Athens Eleftherios V.
3h 35mdirect
£123Aegean Airlines
Wed, 28 Oct - Sat, 31 Oct
LOT Logo
18:40 - 22:00SOF  Sofia-LHR London Heathrow
5h 20m1 stop Warsaw Frederic Chopin
LOT Logo
10:35 - 17:55LHR  London Heathrow-SOF Sofia
5h 20m1 stop Warsaw Frederic Chopin
£125LOT
Tue, 17 Nov - Tue, 24 Nov
LOT Logo
18:30 - 09:35OTP  Bucharest Otopeni Intl-LHR London Heathrow
17h 05m1 stop Warsaw Frederic Chopin
LOT Logo
18:20 - 01:45LHR  London Heathrow-OTP Bucharest Otopeni Intl
5h 25m1 stop Warsaw Frederic Chopin
£133LOT
Mon, 26 Oct - Fri, 30 Oct
Lufthansa Logo
14:40 - 18:35TSR  Timisoara-LHR London Heathrow
5h 55m1 stop Munich Franz Josef Strauss
Lufthansa Logo
06:35 - 14:00LHR  London Heathrow-TSR Timisoara
5h 25m1 stop Munich Franz Josef Strauss
£160Lufthansa
Mon, 26 Oct - Fri, 30 Oct
Lufthansa Logo
14:40 - 18:35TSR  Timisoara-LHR London Heathrow
5h 55m1 stop Munich Franz Josef Strauss
Lufthansa Logo
06:35 - 14:00LHR  London Heathrow-TSR Timisoara
5h 25m1 stop Munich Franz Josef Strauss
£162Lufthansa
Useful Info

Good to know - Cheap tickets from Southeast Europe to London Heathrow Airport

Low season

January

Cheapest flight

£54
Best time to beat the crowds (27% less expensive on average)
Most popular time to fly and prices are also 6% lower on average.
Flight from Bucharest to London Heathrow Airport

Flights from Southeast Europe to Heathrow: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Southeast Europe to Heathrow 
SebastianFlew with American Airlines-Jun 2026
Do not wait for the flight to show up on the board, ours didn’t, you are just supposed to find the British Airways checkin desk
Verified travelerFlew with British Airways-Jun 2025
Be sure to have at least 2 hour layover when flying through London. Also, we have TSA Global and when we checked our luggage, asked to confirm it was on our flight. We were told it was. It was not
JeremiahFlew with British Airways-Dec 2024
Economy is a little tight but the short flight isn’t bad just have headphone and 1-2 movies downloaded to watch
Verified travelerFlew with British Airways-Dec 2023
Watch out for transit times in Heathrow. Always put your liquids in the little stupid baggies.

FAQs for booking Southeast Europe to London Heathrow Airport flights

  • How does KAYAK find such low prices on flights from Southeast Europe to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Southeast Europe to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Southeast Europe to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Southeast Europe is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Southeast Europe to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Southeast Europe with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Southeast Europe to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Southeast Europe up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Southeast Europe to Heathrow

 
Need help choosing which airline to fly with from Southeast Europe to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Bulgaria AirOverall score based on 59 reviews
8.8Crew
8.1Comfort
8.3Boarding
7.2Entertainment
7.9Food
Airline reviews

This was managed by Bulgaria Air. Lots of confusion to whether we had tickets or not. Aegean Airlines also printed both our Aegean Airline and American Airlines flights on the same boarding pass. This caused multiple issues in the Sofia and Athens airports. We could not get a boarding pass from American Airlines since it was booked through Aegean. At passport control in Athens we were so delayed that we almost missed our flight. Passport control was not going to let us pass. They let us go when they announced our flight was boarding.

2.0 MediocreBrian, Aug 2026
Read more Bulgaria Air reviews

This was managed by Bulgaria Air. Lots of confusion to whether we had tickets or not. Aegean Airlines also printed both our Aegean Airline and American Airlines flights on the same boarding pass. This caused multiple issues in the Sofia and Athens airports. We could not get a boarding pass from American Airlines since it was booked through Aegean. At passport control in Athens we were so delayed that we almost missed our flight. Passport control was not going to let us pass. They let us go when they announced our flight was boarding.

Bulgaria Air should stop using buses for boarding if possible. It is very inconvenient and delays the departure

Easy check in. Hot snack with wine if desired. Then chocolate, tea or coffee. Altogether excellent.

Seats are quite small, but due to the plane being empty we were aloud to switch seats to have more room

The water was handed out as we were entering the plane, instead of when we are set down and our hands are free of luggage. There was absolutely no food offered from Sofia to London, except a low quality chocolate, which was not delicious. The flight between London and Miami was ok, as far as service and food, but it was absolutely freezing, throughout the whole aircraft, especially in the back seats, I had to cover my head with a scarf, besides using the blanket and still I was feeling extremely uncomfortable. The passengers seating around me shared the same opinion. We did ask for something to be done about it. The gentleman did try to adjust it, but the effect last very short time, and towards the end of the flight it was extremely cold and blowing strong again ….

Seats that recline. Ice for soft drinks. No charge for did drinks. Wifi.

The crew aboard Aegean were excellent, they picked on our son’s anxiety and immediately came to the rescue to see what they could do to make it go away.

Lovely experience with Aegean. The crew felt with some extremely rude customers with professionalism and poise. The flight went off without a hitch and even landed early!

I love flying with Aegean. Crew is always polite and empathetic. Boardi

The flight was good. There was free WiFi which was fantastic. The crew was a bit rude and short tempered. The landing was super smooth

Got boarded on the plane on time and held there without moving for 2h to avoid paying delay fees. typical Aegean airlines. They should have left us on the gate and do the boarding when we are ready to go.

This is my first time flying Aegean Air and I had a great first time experience. I will fly this airline again.

Just ok. No much of a great travel experience. If you need point A to B they are ok.

Very bad experience during the boarding, the Aegean employees were very rude, and impatient with the passengers

2 hours delay on the plane causing is to miss our connection

Good flight but there was no entertainment. I wouldn’t have complained but you asked.

Flights were delayed and due to a checked hand luggage bag by an overzealous gate agent in Berlin I missed my ground connection costing me another £80. Food was cold and bland, I honestly expect better from a national carrier operating out of one of their major hubs.

A bit more space? Not practical, I know. I felt squished in but part of that could have been the man sitting next to me.

It was my first experience in business class. It was everything I expected and more. Service was impeccable, food was delicious and I felt rested once I arrived to London

Missed our flight to London and we were put on coach seats to Munich.

Seats were terribly uncomfortable! Couldn’t sleep! I paid for good seats when scheduled with Lufthansa, got crappy mid-section seats on Air Canada!

The seats are much too narrow and the arm rests are hard and awkwardly high, resulting in shoulder cramps. I am an average sized person ( definitely not overweight). The seats are a similar size to car seats with the added discomfort of incorporating hard plastic arm rests, that force average height individuals (I'm 5 ft 7 (f)) to hold their arms uncomfortably for several hours. The seats are much too close to the ones in front and behind making it extremely difficult to allow fellow passengers to get out, especially when the seat in front is declined. The leg room also necessitates knees banging into passengers backs for the entire flight. This used to be a quality airline who now offer mediocre service for premium cost, coupled with charging exorbitant prices for basic needs, like a seat, or luggage. Blatant and unabashed gouging of clients.

Try to humanize onboarding and take AI out. It's embarrassing and useless

I ended up buying (for $340) "extra space" seats because I my flying partner was given a STY boarding pass, leading me to conclude that she was on standby and that we had to buy seats on the flight. I later learned that the flight was not sold out and that we could have gotten on as usual. To be honest, I felt swindled.

I'm Canadian. I have the unfortunate experience of pretty not having the choice to fly with them. THEY ARE TERRIBLE.

Check in at bcn was a nightmare. In-seat screen did not work, asked for help twice but was not able to use overhead light, watch the safety briefing, watch entertainment or monitor map

Over sold! Never again. Got bumped even though I checked in and arrived on time with all my documents in order. Wasn’t even offer food/drink voucher for the next flight that was 6 hours later.

The flight was canceled. It was very troubling because the rescheduled to Air France was two days later. I incurred two days extra of hotel, was not able to get a boarding pass until I reach the boarding desk at the airline. I don’t know what happened British Airways, but I was very disappointed.

There was a delay on departure. Seat configuration is horrible. BA should not fly this confirmation any longer until the new seat conjugation is installed. Your competition is beating you. Food was poor to average. Not many choices. Arrival was delayed at the gate due to another plane being at the gate. You would think after the delay at the departure, BA and ground control would figure out how to ensure you passengers wouldn’t be late and running to their next connection. Overall, BA continues to be very low on satisfaction. If I had an other choice, I would choose another airline.

We missed our connection because they loaded the plane wrong. And had to fix the weight and balance

Check in desks at Bodrum we’re not labelled properly to the point we ended up queuing at the desk only for the signs for business and economy to be put up later and we had to move lines to go into the economy queue. By the time we got to the front, we ended up be ushered to the business queue anyway to get checked in. The flight left on time but then we had to circle the air for a good 15 mins and then when we landed we had to wait to be taxied for another hour. Our baggage didn’t arrive but nobodies did but were told after an hour of waiting that no more bags would be delivered to all passengers had to fill out a form to get their bags delivered. Could have told us that a while ago. Very poor communications

Boarding was seamless, crew were great. Less disruptions on the night flight would have improved the experience and turning off lights earlier.

Worst customer service I've ever experienced on a flight. They downgraded my seat without giving me any other options, then sat in a seat with an arched back for 10 hours. I was not able to get ahold of any customer service representatives to understand what alternatives I might have, or how they will be handling a refund for the difference in fares between business and premium economy that I was downgraded to.

British airways needs to improve their luggage handling process and communications. The luggage was lost/left in UK. But, this was not communicated to me as a traveler and because of the wait at the carousel in Seattle (we have to go through customs and immigration on arrival to US) I missed the connecting flight and had to be rebooked. No one informed me that the luggage wasn't there, and there was no one there at the carousel to check with or help me get through security faster. I wasn't the only one- there were a lot of people waiting for luggage that didn't arrive.

My bags were lost. I waited in a line for 5 hours after I landed and got no resolution to the issue.

Basic, 737 Boeing, business class is just an economy class seat with blocked middle seat (European standard).

Entertainment is nonexistent. Food might have been good, however due to language barriers I didn’t get to have any food. Flat bed seats and layout was excellent. Crew efficient and straightforward, but lacking any western style approach. Not that I’d expect anything else, but one could have hoped.

Delaying more than 5 hours from Belgrade to Tirana Information very rude to questions

They had lost my ticket and despite showing them the confirmation email with the itinerary and receipt of payment for the flight they could not put me on that flight and rescheduled departure postponing it by a whole week

Long delay (6 hour late departure, not informative enough to provide up to date info on flight, poor food quality

This was my connection flight that was moved time ahead for a almost entire day so I lost it and I had to purchase new ticket once I landed in Copenhagen since nobody wanted to take responsibility for moving flight in that way so it’s impossible to make it. Very poor job by Underpricer, Air Serbia and SAS.

Lacking online check in, had to wait an hour in order to check in on the counter even without language.

Seats are very small and uncomfortable so such a long flight. My tray table was broken and taped up. Flight attendant untaped it to put my tray on. I taped it back up when done. The armrest between seats was broken and metal exposed. I will not book Air Serbia again.

Our flight was delayed from 1st July to 2nd July. But I wasnt informed! Checked my emails,every detail but I was definitely not informed! I and my family went to the airport on 1st July and learned that rhe flight is delayed to 2nd July at the airport! I am going to complain about this. I had to stay ın Kraljevo one more night. Luckily we could find a room. What ıf We couldn't?

Omg my flight was delayed from 4pm to 9:45 pm with no explanation- that is ridiculous

Travelling to a place near Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Gatwick
Eastbourne
Milton Keynes
Hounslow
Luton
Southend-on-Sea
Northampton
Folkestone
Newport
Winchester
Swindon
Poole
Croydon
Slough
Stansted
Colchester
Chichester
Crawley
Maidstone
Salisbury

More options for your flight to Heathrow