£46 Find Cheap Flights from Southeast Europe to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 17/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 26% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Cheap Flight Deals from Southeast Europe to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Southeast Europe to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from Southeast Europe to Heathrow

KAYAK's recommended return flight deals from the most popular airlines that fly from Southeast Europe to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
British Airways Logo
20:05 - 21:30OTP-LHR
3h 25mdirect
British Airways Logo
18:35 - 23:50LHR-OTP
3h 15mdirect
£100British Airways
Find Deal
Sat, 24 May - Sat, 31 May
British Airways Logo
15:40 - 17:10OTP-LHR
3h 30mdirect
British Airways Logo
20:05 - 01:25LHR-OTP
3h 20mdirect
£106British Airways
Find Deal
Thu, 22 May - Wed, 28 May
Air Serbia Logo
16:05 - 12:30SOF-LHR
22h 25m1 stop
Air Serbia Logo
19:25 - 15:35LHR-SOF
18h 10m1 stop
£129Air Serbia
Find Deal
Thu, 26 Jun - Sun, 29 Jun
Air Serbia Logo
04:30 - 19:05ATH-LHR
16h 35m1 stop
Air Serbia Logo
13:30 - 03:25LHR-ATH
11h 55m1 stop
£129Air Serbia
Find Deal
Sat, 14 Jun - Sat, 21 Jun
LOT Logo
18:40 - 09:20SOF-LHR
16h 40m1 stop
LOT Logo
10:15 - 17:55LHR-SOF
5h 40m1 stop
£130LOT
Find Deal
Wed, 28 May - Wed, 4 Jun
LOT Logo
05:20 - 22:00SOF-LHR
18h 40m1 stop
LOT Logo
06:30 - 13:50LHR-SOF
5h 20m1 stop
£132LOT
Find Deal
Thu, 22 May - Sat, 31 May
Aegean Airlines Logo
16:00 - 17:55ATH-LHR
3h 55mdirect
Aegean Airlines Logo
22:15 - 03:50LHR-ATH
3h 35mdirect
£143Aegean Airlines
Find Deal
Thu, 31 Jul - Sun, 3 Aug
Aegean Airlines Logo
09:15 - 11:15ATH-LHR
4h 00mdirect
Aegean Airlines Logo
22:15 - 03:50LHR-ATH
3h 35mdirect
£162Aegean Airlines
Find Deal
Sun, 25 May - Sun, 1 Jun
Bulgaria Air Logo
06:25 - 08:05SOF-LHR
3h 40mdirect
Bulgaria Air Logo
17:55 - 23:15LHR-SOF
3h 20mdirect
£186Bulgaria Air
Find Deal
Sat, 24 May - Mon, 2 Jun
Bulgaria Air Logo
15:20 - 16:45SOF-LHR
3h 25mdirect
Bulgaria Air Logo
17:55 - 23:15LHR-SOF
3h 20mdirect
£191Bulgaria Air
Find Deal
Wed, 28 May - Wed, 4 Jun
Useful Info

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

Low seasonJanuary
High seasonDecember
Cheapest flight£46
Best time to beat the crowds (21% less expensive on average)
Most popular time to fly and prices are also 9% 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 
JeremiahFlew with British AirwaysOTP-LHRDec 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 AirwaysZAG-LHRSept 2024
Avoid BA at all costs! This is the second consecutive time I have had problems with BA! I will not fly with BA again!
GerhardFlew with British AirwaysATH-LHRJun 2024
Olympic has a fantastic loyalty scheme and cheaper than BA
CraigFlew with British AirwaysATH-LHRJul 2024
Avoid British air. My experience is Heathrow is always busy and my bag did not make my connecting flight
Verified travelerFlew with British AirwaysOTP-LHRJul 2024
fly a different company, if possible. take food on board if you don't want to order on plane.
Verified travelerFlew with British AirwaysATH-LHRDec 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.

Top 5 airlines serving 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.
8.1
Aegean AirlinesOverall score based on 739 reviews
7.8Comfort
6.9Entertainment
7.3Food
7.8Boarding
8.6Crew
Airline reviews

A thoroughly enjoyable experience in business class, which we “won” in the airlines lottery In exchange for a relatively small deposit. The breakfast served at the beginning of this three hour flight was absolutely phenomenal. I would be tempted to fly Aegean airlines on a transatlantic flight in light of this experience.

10.0 ExcellentJeffrey, Apr 2025HER - MUC
Read more Aegean Airlines reviews

A thoroughly enjoyable experience in business class, which we “won” in the airlines lottery In exchange for a relatively small deposit. The breakfast served at the beginning of this three hour flight was absolutely phenomenal. I would be tempted to fly Aegean airlines on a transatlantic flight in light of this experience.

Was grateful that this flight was held for us as we were late from our prior flight.

Our connecting flight from Barcelona to Athens was late and it appeared that we would not make the connectimg flight to Telaviv. The plane ended up waiting and we made the connection. The airline redeemed itself.

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!

When a flight has a delay of about an hour it is customary to announce the passengers

Nice business class service for shot flight. Especially when the free WiFi works

I liked bumping up to Business for less than full price. Also the option to choose your own meal online. In retrospect I would have gone with the standard meal option, but c'st la vie. Overall pretty standard flight, got good views of Greece as the sun rose. That's about it.

It was a short flight (2hours) so the tiny, tiny seats were somewhat tolerable. People with long legs had their knees up to the chair in front of them, quite uncomfortable. I was pleasantly surprised they served a small meal which was quite good. Staff were all great.

Boarding in BCN was really poorly managed. No communication from airline staff and no signs as to what groups line up where. It was just guessing. There were delays that were also not communicated so everybody was standing in line for almost an hour.

they were good. they coordinated pick up of luaggage at final destination. The had text updates on phone with gate/dep.time etc.

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 ….

Cons: "Staff seemed confused and would not let us seat at our assigned seats which we picked in order to accommodate our baby. Instead they put us in an even worse spot and decided to ignore the people that took out seats and left them be."
Cons: "Them actually refunding my flight when I couldn't legally travel due to COVID lockdowns."
Pros: "Nothing"
Cons: "To add food and to patk the plane at the linkway"

Boarding was delayed and we had to get on buses to plane so group # didn't matter. No food or drinks served gratis. Seats were small, knees smashed into the seat ahead, didn't recline. Crew was excellent though.

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

Our original booking with Kayak -our first experience -was exactly what we wanted and worked well. Updates were friendly and reassuring as were the contacts with UnderPricer so a big win-win. We learned a lot on your reliability and will definitely put you on our organisational list for the future.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

Plane and seats ok. Dinners going and coming back were not fantastic. Breakfast from Seattle to London fine with bagel, cheese and fried egg. Second meal on London to Seattle not my favorite of kind of pizza sauce in a pastry. Came with water about three different times on each of my long flights. Staff on all very friendly and helpful.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

Uncomfortable seats. Crazy seat assignments separating families when they could easily have put them together. Good communication from pilot about arrival time after delay in departure. Toilet ran out of water in sink. Snack box poor for flight of this length.

The bed in Club class was not very comfortable, everything else was good.

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

It was cancelled you imbeciles! And then you have the gall to ask for reviews? Here! Have this review, you damned cretins!

Upgrade to business was great. The crew was nice. Disembarkation in Bucharest was very slow through the rear door to a bus to get to the terminal. The business lounge was not clean with bugs running on the floor.

I rated food and entertainment with the lower score because I did not have N/A. No food and entertainment from Bucharest to London.

Poor service ! Water need to be free and a little snack for 3.5 hour during the flight. Tarom company need to take lessons from Turkish Airlines.

There was extreme turbulence for 10-15 minutes a bit after takeoff, which of course is no one's fault. This was a short regional flight with no amenities except water. Departure and arrival wete close ro on-time. The Suceava airport is very small but pleasant and efficient. My baggage all the way from Washington DC, checked through Paris and Bucharest, arrived without a hitch. There was really nothing to complain about except a regrettable 5+-hour layover in Bucharest.

This experience was atypical. The flight left three hours late because of engine technical issues, which meant a very long wait. Unrealistic announcements made it worse by discoursgong leavimg for water, reatrrom, etc. But the crew did its best and apart from the delay, it was not a bad flight. Good entertainment and drink service.In the end, I made my connection anyway.

Pros: "The crew and the flight from Bucharest to Istanbul"
Cons: "The airplane from Athens to Bucharest wa terrible, very old, smelling bad, not maintained, and noisy"

It's the shortest trip one could get from BEG anywhere, so it was fine.

I paid for luggage when I bought the ticket but I could not board until I paid for luggage again. The fault lays at the feet of eDreams, the company that booked our flight. Sorry, Air Serbia, but it did affect the boarding process.

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

Kraljevo is very convenient airport. It's brand new, small.and efficient. Great job!

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

Plane was late causing me to miss connection. Flight the next late causing me to miss the rebooked connection. Air seberia I think is more late than on time

Plane was old. Seats were hard and very close together. No in flight entertainment.

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.

I purchased an exit row seat and priority boarding, about 3 months in advance. Without any communication whatsoever, my seat was moved to row 2, when I checked my reservation 2-3 days before departure. As no exit row seats were available anymore, I selected a seat 1C. However, once at the airport, I was issued maybe the worst possible seat, 29E, middle seat, one row before the last. It is not worth my time to request the refund on the ancillary purchase, I am simply done flying with Air Serbia. Also there was no boarding process to speak of at all, or online check in.

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

Travelling to a place near Heathrow?

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

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.