LHR - KGS

£86 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 15/9. 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
1 adult, Economy

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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Kos, as well as popular online travel agencies
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Cheap Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Kos

Wed, 3 Sep - Mon, 8 Sep
 Logo
10:50 - 19:05LHR-KGS
6h 15m1 stop
 Logo
20:50 - 08:20KGS-LHR
13h 30m1 stop
Wed, 3 Sep - Mon, 8 Sep
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10:50 - 19:05LHR-KGS
6h 15m1 stop
 Logo
20:50 - 08:45KGS-LHR
13h 55m1 stop
Wed, 27 Aug - Wed, 3 Sep
Austrian Airlines Logo
06:00 - 20:50LHR-KGS
12h 50m1 stop
Austrian Airlines Logo
21:40 - 08:45KGS-LHR
13h 05m1 stop
£152Austrian Airlines
Find Deal
Sat, 27 Sep - Sun, 5 Oct
Austrian Airlines Logo
19:30 - 09:10LHR-KGS
11h 40m1 stop
Austrian Airlines Logo
10:00 - 08:20KGS-LHR
24h 20m1 stop
£153Austrian Airlines
Find Deal
Wed, 10 Sep - Wed, 17 Sep
Lufthansa Logo
20:25 - 18:40LHR-KGS
20h 15m2 stops
Lufthansa Logo
19:55 - 08:15KGS-LHR
14h 20m1 stop
£173Lufthansa
Find Deal
Sun, 12 Oct - Sat, 18 Oct
Aegean Airlines Logo
22:15 - 10:55LHR-KGS
10h 40m1 stop
Aegean Airlines Logo
18:10 - 11:15KGS-LHR
19h 05m1 stop
£176Aegean Airlines
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Thu, 14 Aug - Tue, 19 Aug
SWISS Logo
20:05 - 15:10LHR-KGS
17h 05m1 stop
SWISS Logo
20:30 - 07:55KGS-LHR
13h 25m1 stop
£182SWISS
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Sat, 13 Sep - Sat, 20 Sep
Lufthansa Logo
09:00 - 19:25LHR-KGS
8h 25m1 stop
Lufthansa Logo
20:15 - 08:15KGS-LHR
14h 00m1 stop
£185Lufthansa
Find Deal
Tue, 23 Sep - Fri, 26 Sep
Aegean Airlines Logo
22:15 - 10:45LHR-KGS
10h 30m1 stop
Aegean Airlines Logo
11:25 - 17:55KGS-LHR
8h 30m1 stop
£191Aegean Airlines
Find Deal
Wed, 27 Aug - Wed, 3 Sep
SWISS Logo
17:10 - 10:10LHR-KGS
15h 00m1 stop
SWISS Logo
20:40 - 08:15KGS-LHR
37h 35m2 stops
£206SWISS
Find Deal
Booking Insights

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 much is a round-trip flight from London Heathrow Airport to Kos?


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

Cheapest flight£86
Most popular time to fly and prices are also 11% lower 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 £115 for a one-way ticket and £181 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 £271 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 £359 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.

Reviews of the top 4 airlines flying 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 780 reviews
7.0Entertainment
7.4Food
8.6Crew
7.8Boarding
7.9Comfort
Airline reviews

Short flight. Was not told if there was a kosher option for the snack.

10.0 ExcellentMarian, Jul 2025SKG - MUC
Read more Aegean Airlines reviews

Short flight. Was not told if there was a kosher option for the snack.

Lost my bagage on the first leg of our trip. Not even on the transfer but on the first flight they didnt put our bagage

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.

My experience with a GNA was extremely poor. My original flight was canceled. They put me on another flight. Four hours later. They changed my seat number to the last row where I had no room at all and it cost me $120 for luggage. Additionally, I missed my ferry in Paris Athens. I had to rebook my ferry and I could not get a refund so by them canceling the trip for four hours it caused me no ferry to go to Betsy. I had to find a room that night. The only one I could find was at the Hyatt grand in Athens And I lost a night. Stay at Betsy that I had already prepaid so no my experience was awful. Additionally, they never said on any intercom that Greece was one hour ahead of Paris so that was a problem. We had no idea and when it was never communicated to us

Ove Aegean Airlines! Used them for several flights over past 4.months. never flown w them before but will certainly use in the future!!!

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

I can’t even the whole trip was a catastrophe

Delay more than hour created pressure to catch the connecting flight

The food was good. Most the staff was pleasant. The flight would be drastically improved with WiFi on a long international flight.

The whole experience was positive. Crew very friendly and helpful. Very greedy with pre-seat allocation. Web site too complicated

All the flight to USA were arranged to E terminal whereas from Dubrovnik arriving on Zurich is on A80, have to walk all the way from A to E, even need transfer bus , for short transfer time like in an hour, we have to work fast, as soon as arrived at E, it is about time to boarding, pretty tight schedule, I hope Zurich airport can make some rearrangement so that transfer people do not have to walk long way. For short transfer time people, such as 50 min, this is even impossible if still like this.

When I needed to get my bag off of the plane so that I could take a train because the connection was 4 hours later, they took 2 hours to take my bag off making me take the train and miss my flight simultaneously. The seat size on the plane is too small for an average aged woman let alone a middle-aged man. It's unacceptable and I will not fly Boeing again.

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

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.

The plane was late (as was my flight out from Birmingham the day before)

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

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

Excellent once on board. Security staff at Johannesburg rude and aggressive.

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.

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.

Excellent everywhere but Philly, the most rotten airport in the world.

Check in was not the greatest as had to talk to an agent to clarify things and then he transferred us to another agent who had difficulty processing my credit card as there was a system glitch and not a card error.

All good. Loo’s weren’t great and as clean as i would like.

A great flight. The crew was excellent too. Of particular note of excellence was the gluten-free meal which was one of the best offerings I’ve ever had on a plane. Outstanding work, BA chefs.

I was put into business class. Wow! My flight attendant was great! The food amazing’

I got stuffed on both flights into terrible seats. Second flight the seat didn’t even recline and fit s tall person, that’s very uncomfortable.

I arrived at Bridgetown only to fins that a suitcase was missing. It was left at Manchester. I had to wait wait 2 days before deciding on going to collect from the airport personally. I am not happy about paying for baggage at the airport. This I thought was included in the price of the ticket. Who goes away for 2 weeks and does not bring luggage. This was a total rip off and I am not happy. I need someone to contact me before returning so that I don't have to pay all over again to return homde.

Boarding market okay just because of the delay we had, but not related to the crew in any way…

Not so good with their baggage handling as they damaged one of my check in luggage

Economy plus was a very enjoyable experience. Lots of room and the crew were fantastic with the kids. We even got a chance to meet the pilot

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

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