Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Kos from £105

LHR — KGS
25 Nov — 2 Dec1
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

Sat 21/1122:15 -
1 stop13h 20m
Sat 28/1117:15 -
1 stop6h 00m
Deal found 22/10£202
Mon 30/1122:15 -
1 stop7h 30m
Fri 4/1220:40 -
1 stop26h 35m
Deal found 24/10£208
Tue 8/1219:00 -
1 stop16h 35m
Mon 14/1208:25 -
1 stop9h 05m
Deal found 22/10£220
Fri 4/1222:15 -
1 stop7h 30m
Fri 11/1214:05 -
1 stop9h 10m
Deal found 21/10£225
Mon 7/1219:00 -
1 stop10h 45m
Mon 14/1208:25 -
1 stop9h 05m
Deal found 23/10£229
Fri 20/1122:15 -
1 stop13h 20m
Fri 27/1120:40 -
1 stop26h 35m
Deal found 23/10£233
Tue 10/1122:15 -
1 stop16h 30m
Sat 14/1120:35 -
1 stop16h 35m
Deal found 24/10£235
Sat 21/1111:15 -
2 stops22h 15m
Sat 28/1112:00 -
2 stops21h 40m
Deal found 22/10£242
Mon 16/1122:15 -
1 stop13h 20m
Fri 20/1117:15 -
1 stop6h 00m
Deal found 24/10£247

Find flight deals from Heathrow to Kos

Round-trip from

£202

One-way from

£105

Popular in

December

Cheapest in

April

Average price

£248
Aegean Airlines
  • Aegean Airlines
  • 21/11-28/11
  • 2 total stops
  • 19h 20m total
  • London to Kos
Search Deals
Aegean Airlines
  • Aegean Airlines
  • 10/11-31/12
  • 1 total stop
  • 13h 20m total
  • London to Kos
Search Deals
Highest demand for flights based on searches. 42% potential increase in price (£144 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

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

Thu 31/12

16:35-13:35

1 stop19h 00m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£173

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Thu 31/12

20:50-21:15

3 stops22h 25m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£175

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sat 24/4

20:20-08:05

1 stop9h 45m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£186

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Tue 10/11

20:50-16:45

2 stops17h 55m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£192

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sat 31/10

22:15-20:00

1 stop19h 45m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£199

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Tue 17/11

10:30-11:30

2 stops23h 00m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£204
Fastest return journey

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sun 1/11

22:15-07:20

1 stop7h 05m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£217

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Tue 8/12

19:00-13:35

1 stop16h 35m

Kos

Mon 14/12

08:25-15:30

1 stop9h 05m

£220

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

£233

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 7/12

19:00-07:45

1 stop10h 45m

Kos

Mon 14/12

08:25-17:55

1 stop11h 30m

£234

Flights are sorted by cheapest return flights first.

Deals found on 23/10

Showing 1-10 of 18 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?

Zurich (ZRH) – chosen by Cheapflights users on 50% 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?

Athens (ATH) is the most affordable one-stop option, with an average return flight price of £294.

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

Flights via Zurich (ZRH) have the shortest average one-way travel time for one-stop routes: 9h 05m.

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 50m.

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
913 reviews
Check prices

Entertainment

6.9

Comfort

7.9

Boarding

7.8

Food

7.4

Crew

8.7

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

David,Sept 2026

CHQ - ATH

Many issues, seat broken, tray tables broken, climate varied, divider not between business class and economy, passenger behind continually pushing and banging back of seat. Will be sending a complete account of issues
Aegean Airlines
8.1
Very Good
913 reviews
Aegean Airlines
8.1
Very Good
913 reviews
Check prices

Entertainment

6.9

Comfort

7.9

Boarding

7.8

Food

7.4

Crew

8.7

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

David,Sept 2026

CHQ - ATH

Many issues, seat broken, tray tables broken, climate varied, divider not between business class and economy, passenger behind continually pushing and banging back of seat. Will be sending a complete account of issues
SWISS
7.5
Good
2,113 reviews
Aegean Airlines
8.1
Very Good
913 reviews
Check prices

Entertainment

6.9

Comfort

7.9

Boarding

7.8

Food

7.4

Crew

8.7

Overall

8.1

Reviews

1 / 20
2.0
Mediocre

David,Sept 2026

CHQ - ATH

Many issues, seat broken, tray tables broken, climate varied, divider not between business class and economy, passenger behind continually pushing and banging back of seat. Will be sending a complete account of issues

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 16h 35m. Fly via Aegean Airlines to get the fastest option. The distance from London Heathrow Airport to Kos is about 1683 mi.

  • 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 £205 on this airline. An additional option worth looking into is Aegean Airlines, starting at £216.

  • 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£205Average£256FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aegean AirlinesCheapest£216Average£253FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Heathrow to Kos?

Cheapflights helps you search for flights from Heathrow to Kos via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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.

Can Cheapflights notify me if prices for flights from Heathrow to Kos become cheaper?

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.