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Cheap flights from London Heathrow Airport to Kos from £105

LHR — KGS
26 Sep — 3 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Kos

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Kos

Thu 24/906:00 -
1 stop12h 20m
Thu 1/1021:10 -
1 stop26h 30m
Deal found 25/8£158
Tue 29/917:55 -
1 stop14h 30m
Fri 9/1021:40 -
1 stop12h 40m
Deal found 26/8£164
Wed 16/906:00 -
1 stop11h 55m
Wed 23/920:40 -
1 stop13h 15m
Deal found 24/8£168
Wed 16/906:00 -
1 stop26h 10m
Tue 22/920:30 -
1 stop13h 25m
Deal found 24/8£169
Fri 25/906:50 -
1 stop7h 35m
Fri 2/1021:40 -
1 stop26h 00m
Deal found 26/8£170
Sat 19/906:55 -
1 stop10h 50m
Mon 28/909:45 -
1 stop9h 55m
Deal found 23/8£173
Mon 21/906:00 -
1 stop12h 00m
Mon 28/909:45 -
1 stop10h 55m
Deal found 24/8£176
Sun 13/906:00 -
1 stop6h 30m
Fri 18/921:40 -
1 stop12h 40m
Deal found 23/8£180
Mon 14/920:05 -
1 stop21h 35m
Mon 21/911:00 -
1 stop12h 45m
Deal found 22/8£181
Mon 5/1006:00 -
1 stop12h 00m
Mon 12/1020:50 -
1 stop13h 30m
Deal found 26/8£181
Mon 5/1006:00 -
1 stop12h 00m
Wed 14/1021:40 -
1 stop12h 40m
Deal found 25/8£184
Wed 16/906:00 -
1 stop12h 50m
Mon 28/909:45 -
1 stop10h 55m
Deal found 23/8£187

Find flight deals from Heathrow to Kos

Round-trip from

£158

One-way from

£105

Popular in

May

Cheapest in

April

Average price

£309
Austrian Airlines
  • Austrian Airlines
  • 24/9-1/10
  • 2 total stops
  • 38h 50m total
  • London to Kos
Search Deals
Aegean Airlines
  • Aegean Airlines
  • 27/9
  • 1 total stop
  • 7h 20m total
  • London to Kos
Search Deals
High demand for flights, 11% potential price rise
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Cheapest flight prices on average. 4% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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Cheapflights 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 14/9

20:05-19:40

1 stop21h 35m

Kos

Mon 21/9

11:00-21:45

1 stop12h 45m

£181

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 5/10

06:00-20:00

1 stop12h 00m

Kos

Wed 14/10

21:40-08:20

1 stop12h 40m

£184

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Wed 23/9

06:00-20:50

1 stop12h 50m

Kos

Thu 1/10

21:10-08:20

1 stop13h 10m

£192
Fastest return journey

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 25/9

22:15-07:35

1 stop7h 20m

Kos

Fri 9/10

06:00-11:15

1 stop7h 15m

£214

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sun 25/10

22:15-07:45

1 stop7h 30m

Kos

Tue 10/11

08:25-15:30

1 stop9h 05m

£233

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Thu 22/10

16:35-00:35

1 stop6h 00m

Kos

Sun 25/10

20:40-11:10

1 stop16h 30m

£239

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Tue 22/9

11:05-10:25

1 stop21h 20m

Kos

Sun 27/9

11:25-21:35

1 stop12h 10m

£250

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sun 4/10

19:00-07:35

1 stop10h 35m

Kos

Sun 11/10

06:00-11:15

1 stop7h 15m

£253
Cheapest one-way

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sun 27/9

22:15-07:35

1 stop7h 20m

£105

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Thu 15/10

09:55-21:25

2 stops9h 30m

£106

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Heathrow with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Kos

What’s the top stopover airport for flights from London Heathrow Airport to Kos?

Athens (ATH) – chosen by Cheapflights users on 90% of one-stop itineraries from London Heathrow Airport to Kos on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Kos?

Vienna (VIE) is the most affordable one-stop option, with an average return flight price of £149.

What’s the fastest stopover option from London Heathrow Airport to Kos?

Flights via Vienna (VIE) have the shortest average one-way travel time for one-stop routes: 8h 55m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Kos?

Flights via Athens (ATH) offer the fastest connection on this route, with an average stopover time of 4h 04m.

Reviews of airlines servicing Kos

Check out reviews from past customers who have flown with Aegean Airlines and SWISS from London Heathrow Airport to Kos to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aegean Airlines
8.1
Very Good
904 reviews
Check prices

Entertainment

6.9

Overall

8.1

Crew

8.7

Boarding

7.8

Food

7.4

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Theodoros,Nov 2024

ATH - SKG

Excellent crew on board. No issues or silly conflicts during boarding.
Aegean Airlines
8.1
Very Good
904 reviews
Aegean Airlines
8.1
Very Good
904 reviews
Check prices

Entertainment

6.9

Overall

8.1

Crew

8.7

Boarding

7.8

Food

7.4

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Theodoros,Nov 2024

ATH - SKG

Excellent crew on board. No issues or silly conflicts during boarding.
SWISS
7.5
Good
2,058 reviews
Aegean Airlines
8.1
Very Good
904 reviews
Check prices

Entertainment

6.9

Overall

8.1

Crew

8.7

Boarding

7.8

Food

7.4

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Theodoros,Nov 2024

ATH - SKG

Excellent crew on board. No issues or silly conflicts during boarding.

Related info for your journey

  • What airport do you fly into for flights to Kos from London Heathrow?

    Most people fly into Kos (KGS) if they book a flight to Kos from London Heathrow. On average, Kos has 0 inbound flights from London Heathrow per day from 2 airlines. Kos is conveniently located just 12.8 mi from Kos’s city center.

  • How long is the flight from London Heathrow Airport to Kos?

    There are many flights that can get you from London Heathrow Airport to Kos in 7h 20m. Fly via SWISS, Austrian Airlines, or Aegean Airlines to get the fastest option. The distance from London Heathrow Airport to Kos is about 1683 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Kos round-trip?

    Our cheapest airline available from London Heathrow Airport to Kos is SWISS. Our recent data shows that you can find tickets from as low as £202 on this airline. An additional option worth looking into is Aegean Airlines, starting at £217.

  • Can I find deals for flights from Heathrow to Kos that include hotel bookings?

    Yes. In addition to deals on Heathrow to Kos flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Kos?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Kos.

  • Can I find deals for business class flights from Heathrow to Kos?

    Yes. Cheapflights offers flight deals from Heathrow to Kos by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Kos?

Book flights to Kos if you plan to visit one of these locations
Kardamena

Browse thousands of different options on Cheapflights for your next trip

Top 2 airlines flying from Heathrow to Kos

AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£202Average£252FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aegean AirlinesCheapest£217Average£251FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Kos?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Kos.

Can Cheapflights find flights from Heathrow to Kos with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Kos flexibly with Cheapflights today.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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