LHR - KGS

£118 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 15/10. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to Kos

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

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

KAYAK's recommended return flight deals from the most popular airlines that fly from Heathrow to Kos.
Discover the best prices for you by selecting your travel dates on KAYAK.
Lufthansa Logo
07:25 - 19:05LHR-KGS
9h 40m1 stop
Lufthansa Logo
12:40 - 18:25KGS-LHR
7h 45m1 stop
£166Lufthansa
Find Deal
Wed, 21 May - Mon, 26 May
 Logo
07:25 - 19:05LHR-KGS
9h 40m1 stop
 Logo
11:25 - 20:55KGS-LHR
11h 30m1 stop
Wed, 18 Jun - Mon, 30 Jun
Austrian Airlines Logo
06:00 - 17:55LHR-KGS
9h 55m1 stop
Austrian Airlines Logo
18:45 - 08:45KGS-LHR
16h 00m1 stop
£178Austrian Airlines
Find Deal
Sat, 31 May - Sat, 7 Jun
Aegean Airlines Logo
16:35 - 10:55LHR-KGS
16h 20m1 stop
Aegean Airlines Logo
06:00 - 17:55KGS-LHR
13h 55m1 stop
£207Aegean Airlines
Find Deal
Tue, 13 May - Fri, 16 May
Brussels Airlines Logo
07:45 - 10:25LHR-KGS
24h 40m1 stop
Brussels Airlines Logo
20:35 - 20:55KGS-LHR
26h 20m1 stop
£213Brussels Airlines
Find Deal
Sat, 14 Jun - Sat, 21 Jun
Aegean Airlines Logo
22:15 - 13:35LHR-KGS
13h 20m2 stops
Aegean Airlines Logo
11:25 - 15:30KGS-LHR
6h 05m1 stop
£214Aegean Airlines
Find Deal
Sun, 15 Jun - Tue, 24 Jun
SWISS Logo
20:05 - 10:10LHR-KGS
12h 05m1 stop
SWISS Logo
20:30 - 08:15KGS-LHR
37h 45m2 stops
£231SWISS
Find Deal
Wed, 13 Aug - Tue, 19 Aug
SWISS Logo
08:40 - 19:55LHR-KGS
9h 15m1 stop
SWISS Logo
20:40 - 21:45KGS-LHR
27h 05m1 stop
£235SWISS
Find Deal
Wed, 4 Jun - Wed, 11 Jun
Brussels Airlines Logo
06:50 - 16:20LHR-KGS
7h 30m1 stop
Brussels Airlines Logo
17:20 - 21:35KGS-LHR
6h 15m1 stop
£236Brussels Airlines
Find Deal
Fri, 13 Jun - Fri, 20 Jun
Austrian Airlines Logo
06:00 - 20:45LHR-KGS
12h 45m1 stop
Austrian Airlines Logo
21:35 - 21:40KGS-LHR
26h 05m1 stop
£237Austrian Airlines
Find Deal
Fri, 6 Jun - Fri, 13 Jun
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KAYAK's insights & trends for Heathrow to Kos flights

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.

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

High season

August

Cheapest flight

£118
Most popular time to fly (26% 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 £158 for a one-way ticket and £223 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 £261 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 £355 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.

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 739 reviews
6.9Entertainment
7.8Boarding
8.6Crew
7.3Food
7.8Comfort
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.

The flight was generally good but was delayed departure meant a very late arrival for a connecting flight.

Delayed 30 mins Forced to check in my carry on luggage

The cushion of the seats are old and very thin. The food can be more tasty or come with salt packages

The staff were nice people, the food was very cheap, one of the meal was a sandwich or nothing, I couldn't buy any food, mind expensive duty free WAS available right away. 🤒

-Swiss airlines online check in app crashed multiple times -Zurich airport does not have very many bathrooms accessible to people with disabilities - closest disability accessible bathroom to departure gate was 1/4 mile away.

My luggage did not make the connection and 4 days later I still have not received it.

We're talking about a short-haul in-country flight.. there is no confort, no food, just the bottle of water. The seats are squeezed like hell and I was in the back-end of the plane, with one spare row left for the crew and to store excess bags that could not fit in the overhead bin.. Speaking of carry-on, some passengers should be better screened as their bags were simply too big to fit in the overhead bins.. ! How can this happen, and it was an A310, with 2 columns of 3-seater rows.. There is a pseudo-Business class, which is simply a section in the front of the plane where the same seats are occupied only 2 out of 3, on each side, leaving more rooms for the passengers and their bags. That's it.

I like how professional, fast and good the whole experience was.

Terrible plane small airbus good for a 1 hr trip I booked business as it is. A night flight and 4hrs trip it was an ordinary economy seat with no one next to me what a joke what a stupid decision to buy business

For the price of the ticket it's probably the best service in the world

We were charged a ridiculous amount for a name spelling error on ticket which I would’ve corrected if I received pre-check info more than 1/2hr before flight. Then we were told at ticket counter that our bags were fine for boarding but then we’re charged another ridiculous amount to take in our luggage despite being told differently. Flight itself was great. Charges were unfair.

Apart from an email about re configuring passenger seating less than 24hrs before flying it was all good.

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!,

We boarded and then sat on the tarmac for an hour….probably not E Jets fault. But the gentleman that checked us in and took our luggage was exceptionally friendly and calming for early morning/ confused passengers. As always, it’s the people that make or break an experience, right?

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

The flight was delayed by an hour. Made the connection uncomfortably tight.

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

Our flights were severely delayed, then canceled and we had to fly out next day with no sleep accommodation help. This led to our baggage being lost and the service reps after baggage couldn’t be bothered to help. They kept sending us to different counters when we were at the right counter to begin with. The only saving grace was the angel woman supervisor with blond hair who helped us put in a missing baggage claim.

After living in Europe for five years and flying with Lufthansa and KLM airlines, I’ve realized that United Airlines is now a budget carrier. The flight attendant are not friendly. The seats are not comfortable. And everything comes at a cost. I will be flying with KLM and Skyteam like Delta to the US going forward no doubt. United Airlines is not what it once was:

Delayed over 2 hours. Bring your own snacks or prepare to pay. No entertainment and no plug plugs for charging.

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.

Flight was late, with scheduled 50 min layover at Frankfurt. Arrived at gate A54, had to get to B5. We now had 35 min layover with delay, at top speed it took 30 min to get to B5 hot and bothered. Not good. Boarding in Lyon was normal chaos, shoving, and total disrespect for anyone beyond group 2. Boarding for Milan flight was more civilized as we all had to take a bus to plane.

Not enough time between connecting flights. We had to run through the Frankfurt airport and nearly missed our flight to the US. Extremely tight seating in Economy. No room and I'm not a large person. Please prevent any seats from reclining so my kneecaps are not destroyed again. Entertainment system touch screen did not recognize inputs. Seemed to be a problem for many. Crew were very nice and the food was not bad.

Boarding is a mess. They never check group # so lots of people crowding in. Comfortable seats this flight. I had an empty seat next to me, very convenient. Food was really not good, but I was starved. The pizza snack thing was horrible. Crew was grand. They really make it enjoyable.

Crew very helpful and friendly. Food is so so. Main meal is not always the best. Did have a choice of a snack part way which was either a cookie, corn snack, or similar. Second kind of meal was basically like a pizza pastry that really wasn’t a favorite but probably a European snack? Screens and selections of movies, tv and such were good. No WI-Fi unless you buy so no free texting or such on the long flight but I think that might be any overseas flight.

Flight Attendant Karen Lynn was an absolute delight. She assisted in every portion of the services provided throughout the flight, aided with any and all concerns expressed by passengers, and even helped comfort an upset child who was one of five of a traveling family. This quality of service is what keeps me coming back to American. Thank you!

The worst, flight cancelled because the aircraft was not full. Heathrow ground crew totally not helpful and arrogant. Lady proposed us flight with 40min layover instead of direct and said it is our problem of course she was unable to do anything as everything was beyond her control she claimed. after calling on hotline another flight was booked. Flight was cancelled last second so we could not take direct from Zurich but we had to stay overnight in London.

Very quick boarding. I was surprised we only got a small water and small thing of cookies, everything else was for purchase. No entertainment. Crew was excellent though.

Flight delayed in terms of boarding and Kayak was great in updating but the team on the groping at British Airways were really poor

A basic tea/ coffee and a snack could be provided especially for long distance flyers.

The information in the airport, and the app was different. Be aware. Different terminals in Stuttgart, so we had to walk a lot. It's a small airport so it wasn't a big deal, but it was ludicrous to see the error in the app.

Food was terrible , crew were excellent , IFE was dire . Overall comfortable seat and cabin. Nothing special .

If my tv wasn’t broken and I wasn’t in a seat that didn’t allow for sleeping

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