What is the cheapest airline that flies from London Heathrow to Kos?

Aegean Airlines is the most popular carrier operating from London Heathrow to Kos

When did momondo last update prices for flights from London Heathrow Airport to Kos Airport?

Prices for flights from London Heathrow Airport to Kos Airport refresh daily.

How many operators does momondo search for flights from London Heathrow Airport to Kos Airport?

The number of operators available for flights from London Heathrow Airport to Kos Airport is 2 as of October 2026.

How old do you have to be to fly from London Heathrow Airport to Kos Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Kos Airport.

What documentation or ID do you need to fly to Kos Airport?

The required travel and health documents for your Kos Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kos Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£105 Cheap Flights from London Heathrow Airport to Kos in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to Kos

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

20:40 - 21:15KGS Kos-LHR London Heathrow

26h 35m1 stop Athens Eleftherios V.

£209Aegean Airlines

Mon, 30 Nov - Fri, 4 Dec

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

20:35 - 15:30KGS Kos-LHR London Heathrow

20h 55m1 stop Athens Eleftherios V.

£226Aegean Airlines

Fri, 4 Dec - Tue, 15 Dec

19:00 - 07:45LHR London Heathrow-KGS Kos

10h 45m1 stop Athens Eleftherios V.

08:25 - 15:30KGS Kos-LHR London Heathrow

9h 05m1 stop Athens Eleftherios V.

£230Aegean Airlines

Mon, 7 Dec - Mon, 14 Dec

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

20:35 - 17:55KGS Kos-LHR London Heathrow

23h 20m1 stop Athens Eleftherios V.

£233Aegean Airlines

Mon, 7 Dec - Mon, 14 Dec

22:15 - 13:35LHR London Heathrow-KGS Kos

13h 20m1 stop Athens Eleftherios V.

20:40 - 21:15KGS Kos-LHR London Heathrow

26h 35m1 stop Athens Eleftherios V.

£234Aegean Airlines

Fri, 20 Nov - Fri, 27 Nov

22:15 - 13:35LHR London Heathrow-KGS Kos

13h 20m1 stop Athens Eleftherios V.

20:40 - 21:15KGS Kos-LHR London Heathrow

26h 35m1 stop Athens Eleftherios V.

£234Aegean Airlines

Fri, 20 Nov - Fri, 27 Nov

22:15 - 16:45LHR London Heathrow-KGS Kos

16h 30m1 stop Athens Eleftherios V.

20:35 - 11:10KGS Kos-LHR London Heathrow

16h 35m1 stop Athens Eleftherios V.

£236Aegean Airlines

Tue, 10 Nov - Sat, 14 Nov

17:05 - 11:30LHR London Heathrow-KGS Kos

16h 25m2 stops Amsterdam Schiphol Athens Eleftherios V.

17:15 - 21:15KGS Kos-LHR London Heathrow

6h 00m1 stop Athens Eleftherios V.

£239Multiple Airlines

Fri, 4 Dec - Tue, 15 Dec

17:05 - 07:45LHR London Heathrow-KGS Kos

12h 40m2 stops Amsterdam Schiphol Athens Eleftherios V.

08:25 - 17:55KGS Kos-LHR London Heathrow

11h 30m1 stop Athens Eleftherios V.

£248Multiple Airlines

Mon, 7 Dec - Mon, 14 Dec

22:15 - 13:35LHR London Heathrow-KGS Kos

13h 20m1 stop Athens Eleftherios V.

17:15 - 21:15KGS Kos-LHR London Heathrow

6h 00m1 stop Athens Eleftherios V.

£248Aegean Airlines

Mon, 16 Nov - Fri, 20 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

09:00 - 10:10LHR London Heathrow-KGS Kos

23h 10m1 stop Zurich

20:40 - 15:30KGS Kos-LHR London Heathrow

20h 50m1 stop Athens Eleftherios V.

£341Multiple Airlines

Sat, 31 Oct - Mon, 9 Nov

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

20:40 - 15:30KGS Kos-LHR London Heathrow

20h 50m1 stop Athens Eleftherios V.

£351Aegean Airlines

Sat, 31 Oct - Mon, 9 Nov

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

20:40 - 15:30KGS Kos-LHR London Heathrow

20h 50m1 stop Athens Eleftherios V.

£366Aegean Airlines

Sat, 31 Oct - Mon, 9 Nov

18:40 - 10:10LHR London Heathrow-KGS Kos

13h 30m1 stop Zurich

20:40 - 11:15KGS Kos-LHR London Heathrow

16h 35m2 stops Athens Eleftherios V. Zurich

£370Multiple Airlines

Sat, 31 Oct - Mon, 9 Nov

18:40 - 10:10LHR London Heathrow-KGS Kos

13h 30m1 stop Zurich

20:40 - 11:15KGS Kos-LHR London Heathrow

16h 35m2 stops Athens Eleftherios V. Zurich

£393Multiple Airlines

Sat, 31 Oct - Mon, 9 Nov

17:10 - 15:20LHR London Heathrow-KGS Kos

20h 10m2 stops Zurich Athens Eleftherios V.

17:15 - 18:30KGS Kos-LHR London Heathrow

27h 15m2 stops Athens Eleftherios V. Munich Franz Josef Strauss

£394Multiple Airlines

Sat, 31 Oct - Mon, 9 Nov

16:30 - 07:45LHR London Heathrow-KGS Kos

13h 15m2 stops Rome Fiumicino Athens Eleftherios V.

21:45 - 15:40KGS Kos-LHR London Heathrow

19h 55m2 stops Athens Eleftherios V. Rome Fiumicino

£408Multiple Airlines

Sat, 31 Oct - Mon, 9 Nov

20:15 - 10:05LHR London Heathrow-KGS Kos

35h 50m2 stops Munich Franz Josef Strauss Frankfurt am Main

14:20 - 21:40KGS Kos-LHR London Heathrow

9h 20m2 stops Rhodes Diagoras Zurich

£412Multiple Airlines

Thu, 29 Oct - Wed, 4 Nov

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

18:05 - 09:10KGS Kos-LHR London Heathrow

17h 05m2 stops Athens Eleftherios V. Barcelona-El Prat

£418Multiple Airlines

Sat, 31 Oct - Mon, 9 Nov

22:15 - 07:45LHR London Heathrow-KGS Kos

7h 30m1 stop Athens Eleftherios V.

12:05 - 18:45KGS Kos-LHR London Heathrow

8h 40m1 stop Duesseldorf Intl

£432Multiple Airlines

Thu, 29 Oct - Wed, 4 Nov

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Aegean Airlines flights from London Heathrow Airport to Kos

Our best Aegean Airlines deals on London Heathrow Airport to Kos flight tickets

Aegean Airlines

30 Nov

LHR22:15London Heathrow

7h 30m

1 stop

KGS07:45Kos

4 Dec

KGS20:40Kos

26h 35m

1 stop

LHR21:15London Heathrow

£209

Aegean Airlines

4 Dec

LHR22:15London Heathrow

7h 30m

1 stop

KGS07:45Kos

15 Dec

KGS20:35Kos

20h 55m

1 stop

LHR15:30London Heathrow

£226

Aegean Airlines

7 Dec

LHR19:00London Heathrow

10h 45m

1 stop

KGS07:45Kos

14 Dec

KGS08:25Kos

9h 05m

1 stop

LHR15:30London Heathrow

£230

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 30/11

22:15-07:45

1 stop7h 30m

Kos

Fri 4/12

20:40-21:15

1 stop26h 35m

£209

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 4/12

22:15-07:45

1 stop7h 30m

Kos

Tue 15/12

20:35-15:30

1 stop20h 55m

£226

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 7/12

19:00-07:45

1 stop10h 45m

Kos

Mon 14/12

08:25-15:30

1 stop9h 05m

£230

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 7/12

22:15-07:45

1 stop7h 30m

Kos

Mon 14/12

20:35-17:55

1 stop23h 20m

£233

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 20/11

22:15-13:35

1 stop13h 20m

Kos

Fri 27/11

20:40-21:15

1 stop26h 35m

£234

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 20/11

22:15-13:35

1 stop13h 20m

Kos

Fri 27/11

20:40-21:15

1 stop26h 35m

£234

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Tue 10/11

22:15-16:45

1 stop16h 30m

Kos

Sat 14/11

20:35-11:10

1 stop16h 35m

£236

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 4/12

17:05-11:30

2 stops16h 25m

Kos

Tue 15/12

17:15-21:15

1 stop6h 00m

£239

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 7/12

17:05-07:45

2 stops12h 40m

Kos

Mon 14/12

08:25-17:55

1 stop11h 30m

£248

Fastest return journey

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 16/11

22:15-13:35

1 stop13h 20m

Kos

Fri 20/11

17:15-21:15

1 stop6h 00m

£248

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London Heathrow Airport to Kos

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Kos?

According to our data, Tuesday is the cheapest day to fly to Kos from London Heathrow Airport. The lowest ticket price found for a Tuesday departure recently was £194. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Kos is Saturday, with ticket prices averaging around £373.

What is the cheapest time of day to depart on your flight to Kos?

Our most recent data shows that the best time of day to fly to Kos is in the afternoon. Flights from London Heathrow Airport to Kos during this time can be as low as £183. In the morning is when there is more demand to fly to Kos, so prices are often more expensive at around £278 per ticket.

When to book flights from London Heathrow Airport to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Kos according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London Heathrow Airport to Kos (LHR to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Kos

Best price found	£105
Fastest flight time	6h 25m
Direct flights	None

The best one-way flight to Kos from London Heathrow Airport in the past 72 hours is £105. The best return flight deal from London Heathrow Airport to Kos found on momondo in the last 72 hours is £209.

The fastest flight from London Heathrow Airport to Kos takes 6h 25m

There are no direct flights from London Heathrow Airport to Kos. There are no popular flight routes from London Heathrow Airport to Kos.

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Kos

How far is London Heathrow to Kos by plane?
A flight from London Heathrow to Kos will travel around 1686.2 mi. Typically, this will take 6h 25m by plane in normal conditions.
When did momondo last update prices for flights from London Heathrow Airport to Kos Airport?
Prices for flights from London Heathrow Airport to Kos Airport refresh daily.
How many operators does momondo search for flights from London Heathrow Airport to Kos Airport?
The number of operators available for flights from London Heathrow Airport to Kos Airport is 2 as of October 2026.
How old do you have to be to fly from London Heathrow Airport to Kos Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Kos Airport.
What documentation or ID do you need to fly to Kos Airport?
The required travel and health documents for your Kos Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kos Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from London Heathrow Airport to Kos?
Based on momondo bookings for flights between London Heathrow Airport and Kos, the leading airline is SWISS, making up 52% of the total bookings. Other popular airlines include Aegean Airlines with 48%.

Best airlines flying from London Heathrow Airport to Kos

Compare and see reviews for airlines that fly from London Heathrow Airport to Kos with momondo

Airline	Rating	Free Cancellation	Price
SWISS	PriceFrom £206	Free Cancellation	Rating 7.5 2,114 reviews		Search SWISS flights
Aegean Airlines	PriceFrom £217	Free Cancellation	Rating 8.1 913 reviews		Search Aegean Airlines flights

Kardamena

Marmari

Why use momondo?

Why should I use momondo to find a flight deal from London to Kos?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kos from London.

Can I find flights from London to Kos with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Kos from London with this policy.

How can momondo help me find flights from London to Kos?

Once you have performed a search for London to Kos flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from London to Kos right now. Can momondo alert me if prices change?

If you are not ready to book a flight from London to Kos now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Kos and let you know when they change.