LHR - KGS

£106 Find Cheap Flights from London Heathrow Airport to Kos – Compare and Save

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 2/10. 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.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£155
Brussels Airlines, SWISS
Fri 25/9Tue 29/9
LHR - KGS • 1 stop
Cheapest one-way flight
£106
Aegean Airlines
Fri 2/10
LHR - KGS • 1 stop
Top airlines
Cheapest • from £157 (return)
Best reviews • 8.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Heathrow and Kos. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £248 (return)
Shortest trip • 5h 30m (one-way)
Insights
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We hope you love your trip to Kos!
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Booking Insights
Flight Deals

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

Fri, 25 Sep - Tue, 29 Sep
Multiple Airlines Logo
06:50 - 16:25
LHR
-
KGS
7h 35m
1 stop
Multiple Airlines Logo
20:30 - 07:55
KGS
-
LHR
13h 25m
1 stop
£155Multiple Airlines
Sat, 12 Sep - Tue, 15 Sep
Multiple Airlines Logo
11:05 - 19:35
LHR
-
KGS
6h 30m
1 stop
Multiple Airlines Logo
20:30 - 07:55
KGS
-
LHR
13h 25m
1 stop
£156Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
SWISS Logo
08:45 - 19:40
LHR
-
KGS
8h 55m
1 stop
SWISS Logo
20:30 - 07:55
KGS
-
LHR
13h 25m
1 stop
£157SWISS
Tue, 15 Sep - Thu, 24 Sep
Multiple Airlines Logo
08:45 - 19:40
LHR
-
KGS
8h 55m
1 stop
Multiple Airlines Logo
21:10 - 08:20
KGS
-
LHR
13h 10m
1 stop
£167Multiple Airlines
Wed, 9 Sep - Wed, 16 Sep
SWISS Logo
18:40 - 10:10
LHR
-
KGS
13h 30m
1 stop
SWISS Logo
20:40 - 07:55
KGS
-
LHR
13h 15m
1 stop
£168SWISS
Tue, 11 Aug - Tue, 18 Aug
SWISS Logo
08:45 - 19:40
LHR
-
KGS
8h 55m
1 stop
SWISS Logo
20:30 - 07:55
KGS
-
LHR
13h 25m
1 stop
£169SWISS
Tue, 18 Aug - Tue, 25 Aug
SWISS Logo
06:00 - 19:40
LHR
-
KGS
11h 40m
1 stop
SWISS Logo
20:30 - 07:55
KGS
-
LHR
13h 25m
1 stop
£180SWISS
Thu, 1 Oct - Thu, 8 Oct
Austrian Airlines Logo
06:00 - 20:20
LHR
-
KGS
12h 20m
1 stop
Austrian Airlines Logo
21:10 - 08:20
KGS
-
LHR
13h 10m
1 stop
£182Austrian Airlines
Mon, 31 Aug - Mon, 7 Sep
SWISS Logo
20:05 - 19:40
LHR
-
KGS
21h 35m
1 stop
SWISS Logo
11:00 - 17:50
KGS
-
LHR
8h 50m
1 stop
£182SWISS
Tue, 25 Aug - Tue, 1 Sep
SWISS Logo
06:00 - 19:40
LHR
-
KGS
11h 40m
1 stop
SWISS Logo
20:30 - 21:30
KGS
-
LHR
27h 00m
2 stops
£185SWISS
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.

Which airlines provide the cheapest flights from London Heathrow Airport to Kos?

The cheapest return price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest return tickets from London Heathrow Airport to Kos were found on SWISS (£157) and Austrian Airlines (£182).

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

Cheapest flight

£106
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 5 days, the lowest price for a flight from London Heathrow Airport to Kos was £106 for a one-way ticket and £155 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?

    We unfortunately don’t have that data for this specific 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 £256 and an overall rating of 8.2, Aegean Airlines is the most popular choice. SWISS is also a great choice for the route, with an average price of £257 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 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.
8.2
Aegean AirlinesOverall score based on 903 reviews
7.9Comfort
7.8Boarding
8.7Crew
6.9Entertainment
7.4Food
Airline reviews

Crew was great, service was good, flight went well. Originally, the flight was advertised with WiFi… including during check in… and nada.

8.0 ExcellentShalom, Jun 2026
TLV - ATH
Read more Aegean Airlines reviews

Crew was great, service was good, flight went well. Originally, the flight was advertised with WiFi… including during check in… and nada.

Aegan Airlines compensates for its outdated business-class seats with excellent food and onboard crew service. Launge was also excellent.

It was a short flight. It did leave about 15 minutes late but other than that everything went well!! There was no food service or entertainment so can’t comment on any of that.

For a quick trip to athens they did a great job plane was spacious, and we boarded quickly.

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.

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

Fine. It was a 25 minute ride in a tiny plane that left 20 mins late

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.

More leg room, great if crew could move people before flight (ie if 3 in a row, offer to move 1 or 2 to an empty 3 seat row rather than let people move themselves after takeoff

Didn't make the connection as my primary flight was 3 hrs late, I had to basically beg to be put on a different airline to continue my trip otherwise I would have been sitting on the airport for 8 hrs

Very unprofessional treatment of customers - boardring on being unethical. Only cares about money and not the customer. If you use the swiss brand, you should deserve it - now swiss air doesn't deserve the swiss brand.

Best international flight I have had in a while! Far superior accommodation, services, food and general experience compared to U.S. airline companies.

Very nice crew and great food. Easy to board just wish the flight could be shorter or seats more comfortable or more room to walk around when you get cramps in your legs from sitting so long. Crew was great and attentive and really was good food.

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.

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

So disappointed, the flight from Zurich to Sarajevo was delayed for two hours for no reason, they were also shifting gate several times prior taking off

No fault of the crew, but the the rear lavatories were closed the entire flight. The front lavatories were blocked off for the first part of the flight by the food cart. Then some minor turbulence occurred so the fasten seatbelt sign came on for the second part of the flight. Heroic containment engaged! It was not fun.

I don't think I will fly Swiss again. I had issues with carry on luggage, connections were really tight, food was average, I paid extra for an aisle seat, then it was changed at check-in, the app/website don't allow you to add extra baggage if needed, and it was the first long-haul flight that didn't provide alcohol (glass of wine with dinner).

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

Information on your arrival and departure airports