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Cheap flights from London Heathrow Airport to Kos from £103

LHR — KGS
30 Oct — 6 Nov1
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

Mon 9/1122:15 -
1 stop13h 20m
Mon 16/1120:40 -
1 stop26h 35m
Deal found 25/9£200
Mon 23/1122:15 -
1 stop13h 20m
Thu 26/1120:40 -
1 stop26h 35m
Deal found 25/9£218
Tue 10/1119:00 -
1 stop16h 35m
Tue 17/1108:25 -
1 stop11h 30m
Deal found 26/9£221
Fri 9/1006:00 -
1 stop12h 50m
Mon 12/1020:50 -
1 stop13h 30m
Deal found 28/9£226
Mon 7/1222:15 -
1 stop13h 20m
Mon 14/1208:25 -
1 stop14h 50m
Deal found 29/9£230
Mon 9/1122:15 -
1 stop7h 30m
Mon 16/1121:45 -
2 stops16h 35m
Deal found 25/9£232
Tue 10/1122:15 -
1 stop7h 30m
Tue 17/1121:45 -
2 stops15h 00m
Deal found 28/9£240
Fri 2/1006:50 -
1 stop7h 35m
Wed 7/1021:40 -
1 stop12h 40m
Deal found 26/9£243
Mon 5/1006:00 -
1 stop12h 00m
Mon 12/1020:50 -
1 stop13h 30m
Deal found 28/9£245
Thu 8/1016:35 -
1 stop13h 00m
Thu 15/1007:50 -
1 stop9h 40m
Deal found 27/9£246

Find flight deals from Heathrow to Kos

Round-trip from

£164

One-way from

£103

Popular in

May

Cheapest in

April

Average price

£211
SWISS
  • SWISS
  • 14/10-21/10
  • 2 total stops
  • 19h 30m total
  • London to Kos
Search Deals
3/10-31/12
  • 3/10-31/12
  • 1 total stop
  • 21h 05m total
  • London to Kos
Search Deals
High demand for flights, 7% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 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

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Route

Depart

Return

Price

Cheapest return flight

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sat 3/10

21:10-20:15

1 stop21h 05m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£103

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sun 15/11

22:15-13:35

1 stop13h 20m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£105
Fastest return journey

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 30/10

08:05-16:35

1 stop6h 30m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£116

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sun 4/10

19:00-07:20

1 stop10h 20m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£140

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 11/12

19:00-07:45

1 stop10h 45m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£140

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 11/12

20:50-20:05

3 stops21h 15m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£141

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sat 17/10

19:30-09:10

1 stop11h 40m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£144

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Fri 30/10

17:05-07:45

2 stops12h 40m

Kos

Wed 31/12

00:00-23:00

Nonstop0h 00m

£166

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Sat 10/10

22:15-07:20

1 stop7h 05m

Kos

Mon 19/10

06:00-11:15

1 stop7h 15m

£252

LondonKos

LHR London Heathrow - KGS Kos

LHRKGS

London Heathrow

Mon 7/12

19:00-07:45

1 stop10h 45m

Kos

Mon 14/12

14:05-21:15

1 stop9h 10m

£253

Flights are sorted by cheapest return flights first.

Deals found on 25/9

Showing 1-10 of 16 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

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
911 reviews
Check prices

Crew

8.7

Overall

8.1

Entertainment

6.9

Food

7.4

Comfort

7.9

Boarding

7.8

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
911 reviews
Aegean Airlines
8.1
Very Good
911 reviews
Check prices

Crew

8.7

Overall

8.1

Entertainment

6.9

Food

7.4

Comfort

7.9

Boarding

7.8

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
2,086 reviews
Aegean Airlines
8.1
Very Good
911 reviews
Check prices

Crew

8.7

Overall

8.1

Entertainment

6.9

Food

7.4

Comfort

7.9

Boarding

7.8

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 7h 05m. 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 £208 on this airline. An additional option worth looking into is Aegean Airlines, starting at £218.

  • 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£208Average£259FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aegean AirlinesCheapest£218Average£255FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights

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