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

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

Low season

January
Best time to beat the crowds (34% less expensive on average)
Most popular time to fly (6% more expensive on average)

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
8.3Boarding
8.1Comfort
8.8Crew
7.3Entertainment
8.0Food
Airline reviews

I wanted to give them a five‑star rating across the board, but they lost my luggage, and that really affected the experience.

8.0 ExcellentNikola, Oct 2026
Read more Bulgaria Air reviews

I wanted to give them a five‑star rating across the board, but they lost my luggage, and that really affected the experience.

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

No wi-fi service Crew could not tell what ingredients were in the special food ordered Plane was held for 90 minutes upon arrival and the pilot and crew did allow passengers to use the restroom. Plane was not moving at all, and easily that could have been arranged. Choice on entertainment system is not very big.

Flying business class saves you. Once you get out of the terminal and onto the plane, it’s fine. The traffic at the gate is a horror. No organization at all. The fact that Business class is promised early boarding is a myth.

The seat was paid for but given for some different person .

Delay rushed to the next plane and bags didn’t arrive in chicago

Boeng Dreamliner has so tiny seats, so even medium and smaller size people have not enough room to fill comfortable..

One of the best experiences ever. Thank you to the crew.

bus ride to the plane was very crowded and had to wait a long time to get to the plane. The flight itself was great.

Lost my suitcase. And communication was poor. No offers of compensation for over 24 hour delay of bag

Horrible trip. Plane was late , so late . the flight conditions were very uncomfortable.

Delay everywhere,5 hours,24 hours,missing all connection flights,terrible trip..

The boarding procedure with Boarding Category Group 5 clients is just undignified.

Proximity of the the gate to the lounge could have been better but overall a nice experience. The lounge was exceptional. Getting from the Schengen side to the international side was also pain free. Boarding the plane, service on board , disembarking at Heathrow and quick delivery of bags all made for a good overall experience.

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

Disappointed as we discovered when checking in at the airport 6hrs before the flight was scheduled, that we had been offloaded onto standby after having purchased these tickets months in advance. We had tried checking in online the night before but were unable to. BA had obviously over sold the seats, and we were told they couldn't confirm we could get on the flight until check in closed. Eventually we did get on but were not seated together. That was a bit of stress we just didn't need.

My flight from Athens to London was delayed 30 minutes. I got automatically booked on a different flight before the plane landed. However, I never received any notification about the new booking so I had zero knowledge about the flight number or even where to go. Checking in: it was absolutely impossible to check in for my flight online. I literally had to call British Airways to check in for my flight and select a seat. It was very inconvenient and a bit stressful.

I ordered a drink, but never got it. I ask what type of drinks they had and they could not tell me and there was not printed copy that I could find that is usually on most airplanes. They served dinner and never walk back to see if any need a drink or anything afterwards until they served the snack just before landing.

Check-in wait time was quite long (understaffed for the volume of customers), but energy and hospitality of flight crew was great!

I really enjoyed the flight…and food and the hospitality but didn’t get the food I requested for.

Everything was terrific. Kevin, and the whole crew, were exceptional. Five stars all around! Thanks so much.

Flight held at gate for other passengers. We ended up being late and missed connection

Should have more cosmopolitan food choices - too many Indian dishes - the only entree not Indian was lamb which I don't eat

The plane was ancient, and its technology was in disrepair. None of the charging stations worked, and the screens were barely functioning.

Worst thing: Luggage took forever to get at LAX despite priority bags. Best: Flight attendants were great!

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