LHR - KGS

£136 Find Cheap Flights from London Heathrow Airport to Kos

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Kos departing on 3/6. 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
0 bags

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Kos.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Kos.
In the last 7 days, travellers have searched 41,299,237 times on KAYAK, and here's why:

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Cheap Flight Deals from London Heathrow Airport to Kos (LHR-KGS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London Heathrow Airport to Kos 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 Heathrow to Kos

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Heathrow to Kos.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
16:35 - 12:05LHR-KGS
17h 30m1 stop
12:35 - 17:55KGS-LHR
7h 20m1 stop
£167Aegean Airlines
Find Deal
Fri, 7 Feb - Mon, 10 Feb
22:15 - 10:55LHR-KGS
10h 40m1 stop
11:25 - 21:10KGS-LHR
11h 45m1 stop
£238Aegean Airlines
Find Deal
Mon, 31 Mar - Tue, 8 Apr
16:35 - 08:05LHR-KGS
13h 30m1 stop
20:35 - 09:55KGS-LHR
15h 20m2 stops
Fri, 7 Feb - Mon, 10 Feb
22:15 - 11:20LHR-KGS
11h 05m2 stops
11:25 - 17:55KGS-LHR
8h 30m1 stop
£265Aegean Airlines
Find Deal
Sun, 11 May - Wed, 14 May
16:50 - 21:15LHR-KGS
26h 25m3 stops
12:35 - 17:55KGS-LHR
7h 20m1 stop
Fri, 7 Feb - Mon, 10 Feb
22:15 - 10:55LHR-KGS
10h 40m1 stop
06:00 - 11:15KGS-LHR
7h 15m1 stop
£292Aegean Airlines
Find Deal
Sat, 10 May - Sat, 7 Jun
22:15 - 11:20LHR-KGS
11h 05m2 stops
11:50 - 21:10KGS-LHR
11h 20m2 stops
£304Aegean Airlines
Find Deal
Sun, 11 May - Wed, 14 May
17:50 - 12:05LHR-KGS
16h 15m2 stops
08:35 - 21:00KGS-LHR
14h 25m2 stops
Thu, 20 Feb - Mon, 24 Feb
16:35 - 12:05LHR-KGS
17h 30m1 stop
16:15 - 09:35KGS-LHR
19h 20m2 stops
Thu, 20 Feb - Mon, 24 Feb
06:00 - 19:45LHR-KGS
11h 45m1 stop
20:45 - 18:30KGS-LHR
47h 45m2 stops
£337SWISS
Find Deal
Sat, 10 May - Sat, 7 Jun

Flights from Heathrow to Kos - Travel Insights & Trends

Get data-powered insights and trends into flights from Heathrow to Kos to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from London Heathrow Airport to Kos?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Kos, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from London Heathrow Airport to Kos is June, where tickets cost £72 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £422 and £341 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Kos, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from London Heathrow Airport to Kos, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Kos

Low season

February

High season

August

Cheapest flight

£136
Best time to beat the crowds (38% less expensive on average)
Most popular time to fly (16% more expensive on average)
Flight from London Heathrow Airport to Kos

When to book flights from Heathrow to Kos

Are your dates flexible? Find out the best times to travel from Heathrow to Kos based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking London Heathrow Airport to Kos flights

  • What is the cheapest flight from London Heathrow Airport to Kos?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Kos was £171 for a one-way ticket and £209 for a return.

  • Which airports will I be using when flying from London Heathrow Airport to Kos?

    London Heathrow Airport and Kos are both served by 1 main airport. You will leave London Heathrow Airport from London Heathrow and will be arriving at Kos.

  • Which aircraft models fly most regularly from London Heathrow Airport to Kos?

    The Airbus A320neo is the aircraft model that flies most regularly on the London Heathrow Airport to Kos flight route.

  • Which airline alliances offer flights from London Heathrow Airport to Kos?

    Star Alliance is the only airline alliance operating flights between London Heathrow Airport and Kos.

  • Which is the best airline for flights from London to Kos, Aegean Airlines or SWISS?

    The two airlines most popular with KAYAK users for flights from London to Kos are Aegean Airlines and SWISS. With an average price for the route of £289 and an overall rating of 8.1, Aegean Airlines is the most popular choice. SWISS is also a great choice for the route, with an average price of £345 and an overall rating of 7.5.

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

    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 London Heathrow Airport to Kos.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kos from London Heathrow Airport 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 London Heathrow Airport to Kos?

    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 Kos with an airline and back to London Heathrow Airport with another airline.

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

    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 Kos from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Kos

  • Looking for a cheap flight from Kos to London Heathrow Airport? 25% of our users found flights on this route for Kos or less round-trip.

Top 5 airlines serving from Heathrow to Kos

 
See real verified KAYAK customer reviews for airlines flying from London to Kos. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Kos? 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 746 reviews
7.8Boarding
8.6Crew
7.8Comfort
7.0Entertainment
7.3Food
Airline reviews

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

10.0 ExcellentShalom, Dec 2024ATH - LUX
Read more Aegean Airlines reviews

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.

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

Flight was late leaving which made connecting in Athen very hard. Baggage took an hour to come out. Come on… for such a small plane. Need to step up your game Aegean!

The flight was delayed for no reason by 30 min making my connection very hard to get.

Flight had delays as always. It has been very disappointing as the last 4 times I’ve travelled with Aegean we always had delays.

We are glinting with united , but over all very disappointed

Nothing special.. they could have provided something to eat without a charge

Everything was great except food . It as okay not good not bad

Flight attendant served beverage to everyone during meal service and forgot about me. Had to call her several times until she realized it. Not a good service for a business class flight

I have no complaints. The crew was attentive, pleasant and heloful

The seats had no space at all beyond the knees. The seat in-front literally reclined on your face, very uncomfortable plane. Was nothing like the normal SWISS experience. The food was okay but could be better.

I never share this kind of things but I have to share this out of respect to myself and how surprised I was I got a shoulder injury so I went to Turkey to get a procedure to my shoulder ( I can prove and provide it with documentation from the hospital to you) and on my way in this flight, I asked one of the crew members who’ s name is j. Muller to help me to lift my carry on to put it up in to cabinet and she told me she can’t do it , and I said I m sorry I m injured , I really need help , then can you please find someone who can help me ? And she gave me this nasty attitude and refused to help me . Then I was shocked because all I asked was for help, i didn’t even ask her to put my carry on bag up for me , all I asked her to help me so we can do it together. Then 5 minutes later another crew member who’s name is Jenny Rutz came and asked me if everything is ok And i explained her what happened and she told me if I create more problem, she will not let me fly i was shocked, all I told her was I was injured and I needed some help to put my luggage up . I am extremely shocked and upset , this was so unprofessional, rude and unnecessary. I thought their job is to help us in our flight. She disrespected me , embarrassed me, made me feel like I m a problem and threatened me to get me out of the plane In front of everyone I am 41 years old mature and kind woman, i have never in my life experienced something this unprofessional and this disrespectful ever They both turned something so simple and normal into this terrible experience for me and for the people sitting around me . So it was so uncomfortable and unfair that the other passengers who were sitting around me and next to me got negatively affected by the event and told me to take their phone number so that they can be my witness for the crew member’ rudeness and unprofessionalism I m still very upset how can people be this rude and heartless I will never ever want to fly with your airline company again

Crew was wonderful, snacks were so good and quite a variety for free, food was mediocre, big selection of movies and they kept lavatories pretty clean throughout the flight

It was not made clear that additional passport control is needed before queueing up for boarding. The seats were very uncomfortable and cramped even for small persons. The arm rests were not fully capable of lifting up out of the way and the media controls cut-out made them even worse to lean on. Just one audio channel was working on one of our seats.

Everything was great, except for food. It was not good. I think I got a food poisoning from the salad.

There were a lot (4 I think) of EasyJet flights leaving Agadir, we arrived two and a half ours before our flight. Very slow to get through the booking in, passport control and security!! We had booked in on line but had to Queue with others who had not to drop our bags off!,

I was hesitant to book with a low cost airline due to previous experience but Easy Jet surpassed my expectations. I would definitely book a flight with them again! Seemless booking, upfront about baggage fees, professional, and helpful staff.

Kayak sent several notifications that the flight was late. This contradicted the information on the airport boards. This was extremely confusing and we very nearly missed the flight purely because we double checked with the info desk when the flight stays said’closed’. Kayak notifications are therefore unreliable and pointlesa

Usual issues with flight delay. Perennial problem of travel by plane.

i didnt go this was a hacker booked this flight on my debit card !

Delayed almost 2 hours sitting on plane. No updates at all from flight deck and virtually no updates from cabin crew

Long delay resulted in my being unable to catch a train home and resulted in an additional £76 cost for an Uber

I was charged at the gate for bags I had already paid for. There was no other option. I am trying diligently thought easyJet website but making no progress HELP!

Be sure to check bags for 23 kg,.(50 lbs) Coming from US I chose the wrong size luggage weight when I checked in on my phone, and had to pay more when I dropped it off

The flight was delayed for over 1 hour. The boarding process is appalling making you wait for 30 minutes in the passage leading to the outside door without any seats.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

Flights scheduled with impossible connections - Lufthansa apparently believes it takes 7mins to change terminals, go through passport control, re-clear security and walk 1.8kms…..and everything will work perfectly (which it never does at Frankfurt). No staff on hand to assist with transfers on delayed flights. No transfer guidance provided by app. No compensation offered for 6hr delay to connecting flight.

Crew were friendly and very helpful Plane was clean and the legroom is standard. Overall a good flight, no complaints.

Zero legroom or space in economy. Flight was delayed into Munich causing a missed connecting flight and other missed bookings. :(

Delayed take off but I think they waited for passengers.

I remember flying with Lufthansa many years ago, and it used to be an amazing airline with more technologically savvy and roomy planes, but unfortunately that isn’t the case anymore. The space between the seats is much smaller, which is ok for short flights, but definitely not for across the Atlantic flights. Not sure if I’ll opt for Lufthansa the next time, maybe just if necessary.

I had to fly United where the flight crew was atrocious

Good flight. Entertainment equipment was sub-par - old-style 2-prong jack headphones that don't fir ears well. Entertainment software interface was slow and glitchy to navigate.

Boarding delayed 1.5 hours. Ended up sick because of all the delays and lines waiting around airport and boarding.

The connection to LYON was very tight. The flight was nearly finished boarding when we got to the gate

I never made this flight but the staff helped to get me rebooked (see previous review)

The seat was very uncomfortable. It helped to use the foot rest. Could not sleep because of the seat.

The seats are incredibly uncomfortable. My luggage didn't make it on the flight from London to Nashville.

The plane itself is old and way overcrowded. The crew do a great job of trying to mitigate. It is just uncomfortable for over 8 hours, bearable, but barely. Boarding, and the baggage game, is ludicrous. Why charge extra to check bags when there is not enough room for everyone to "carry-on" and checking is needed? I do not think these issues would be different with other airlines, I believe it is the attitude that squeezes every penny out of each traveler.

Expected a lot better service paying for a business class seat. Seemed to be short on staff and did not get the service I expected.

Nice experience. Baggage arrival in Mumbai wasn't that quick and needs improvement.

I flew Club World and was SHOCKED at how totally absent the crew were for the duration of the flight. So much so that we received no drink service other than the post-departure cocktail and that was it. Wasn't even offered tea/coffee and the in-flight attention was so bad that literally minutes before landing the one crew member for our row was scrambling to pick up left-behind water bottles, glassware, trash. And the rest of the crew had already stowed all carts, he was cramming the trash into the lavatory trash can and was stashing the glassware frantically in the galley as we were on final approach. He was so scrambled he left two overhead lockers wide open (that he'd opened) for landing. Unbelievable!

Paid for first class and was surprised that the seats were the same in economy except no one was in the middle seat. I expected an actual first class seat.

The flight was several times changed. That was inconvenient, to sah the least.

They lost my special meal request and tried to tell me I didn't request it. I had the proof. Then they tried to get me to eat food I can't eat. No apologies

Book cheap flights from London to Kos

Cheapest flights to Kos from London found in 2024 and 2025

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from London to Kos found on KAYAK in the last 72 hours.
3/6Tue
2 stopsAegean Airlines
16h 30mLHR-KGS
£136
7/5Wed
2 stopsAegean Airlines
11h 05mLHR-KGS
£174
4/6Wed
1 stopAegean Airlines
20h 30mLHR-KGS
£181
4/6Wed
2 stopsAegean Airlines
19h 15mLHR-KGS
£205
7/5Wed
1 stopLufthansa
9h 40mLHR-KGS
£228
12/5Mon
1 stopSWISS
10h 45mLHR-KGS
£414
12/5Mon
2 stopsSWISS
9h 45mLHR-KGS
£476

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Everything you need to know for your flight from Heathrow to Kos

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