Cheap flights from London Heathrow Airport to Kos from £86

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KGS
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Heathrow to Kos

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Kos (KGS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 September 2025.

Round-trip from

£147

One-way from

£86

Popular in

December

Cheapest in

January

Average price

£256
SWISS
  • SWISS
  • 14/10-21/10
  • 2 total stops
  • 41h 10m total
  • London to Kos
Aegean Airlines
  • Aegean Airlines
  • 13/10
  • 1 total stop
  • 10h 40m total
  • London to Kos
Highest demand for flights based on searches. 6% potential increase in price (£13 potential increase over avg. return price).
Cheapest flight prices on average. 7% potential price decrease (£15 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Heathrow to Kos

Cheapest flights from Heathrow to Kos
Explore the most affordable flight options available from Heathrow to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Tue 14/1015:05LHR - KGS
1 stop27h 45mMultiple Airlines
Tue 21/1020:30KGS - LHR
1 stop13h 25mMultiple Airlines
Deal found 16/9£147
Sun 5/1019:30LHR - KGS
1 stop22h 30mAustrian Airlines
Mon 13/1020:50KGS - LHR
1 stop13h 30mAustrian Airlines
Deal found 17/9£147
Sun 5/1019:30LHR - KGS
1 stop22h 30mAustrian Airlines
Fri 10/1021:35KGS - LHR
1 stop12h 45mAustrian Airlines
Deal found 17/9£148
Wed 8/1010:25LHR - KGS
1 stop8h 25mAustrian Airlines
Mon 13/1020:50KGS - LHR
1 stop13h 30mAustrian Airlines
Deal found 15/9£149
Wed 15/1020:05LHR - KGS
1 stop12h 05mSWISS
Wed 22/1020:40KGS - LHR
1 stop13h 15mSWISS
Deal found 16/9£149
Mon 6/1006:00LHR - KGS
1 stop12h 00mAustrian Airlines
Fri 10/1021:35KGS - LHR
1 stop13h 25mAustrian Airlines
Deal found 17/9£151
Sat 1/1107:40LHR - KGS
1 stop9h 45mLufthansa
Wed 5/1118:55KGS - LHR
1 stop6h 00mLufthansa
Deal found 15/9£152
Fri 3/1017:50LHR - KGS
1 stop23h 45mMultiple Airlines
Wed 8/1021:40KGS - LHR
1 stop13h 05mMultiple Airlines
Deal found 17/9£159
Sun 12/1022:15LHR - KGS
1 stop10h 40mAegean Airlines
Thu 16/1018:10KGS - LHR
1 stop25h 45mAegean Airlines
Deal found 17/9£161
Mon 29/909:05LHR - KGS
1 stop8h 55mAustrian Airlines
Mon 6/1020:50KGS - LHR
1 stop13h 55mAustrian Airlines
Deal found 17/9£163
Wed 1/1009:05LHR - KGS
1 stop9h 45mAustrian Airlines
Wed 8/1021:40KGS - LHR
1 stop12h 40mAustrian Airlines
Deal found 17/9£164
Thu 2/1017:50LHR - KGS
1 stop20h 30mMultiple Airlines
Fri 10/1021:35KGS - LHR
1 stop12h 45mMultiple Airlines
Deal found 17/9£169

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Kos that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Kos that are best for you.

Fly from

Heathrow

Fly to

Kos

Route

Depart

Return

Price

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 31/10

20:05-17:05

1 stop19h 00m

Kos

Wed 5/11

18:55-22:55

1 stop6h 00m

£171

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Tue 14/10

07:00-19:40

2 stops10h 40m

Kos

Tue 21/10

20:30-16:25

1 stop21h 55m

£180

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 5/10

19:30-20:00

1 stop22h 30m

Kos

Wed 15/10

21:40-08:20

1 stop12h 40m

£197

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Tue 14/10

12:15-23:55

1 stop9h 40m

Kos

Tue 21/10

15:30-09:10

2 stops19h 40m

£201

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 31/10

22:15-08:05

1 stop7h 50m

Kos

Fri 7/11

20:40-21:15

1 stop26h 35m

£207

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Mon 29/9

22:15-23:55

1 stop23h 40m

Kos

Thu 2/10

09:40-14:05

1 stop6h 25m

£208

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Tue 7/10

22:15-11:20

2 stops11h 05m

Kos

Thu 9/10

06:00-15:30

1 stop11h 30m

£215

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 15/10

07:00-19:55

2 stops10h 55m

Kos

Wed 22/10

20:40-07:55

1 stop13h 15m

£217

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Thu 30/10

19:00-12:05

1 stop15h 05m

Kos

Thu 6/11

20:40-15:30

1 stop20h 50m

£221

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 10/10

22:15-10:55

1 stop10h 40m

Kos

Thu 16/10

18:10-17:55

1 stop25h 45m

£225

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 19 results
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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest time of day to fly from LHR to KGS?

Find hourly flight availability from Heathrow to Kos. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Kos in the afternoon. If you’re flexible enough to do this you can expect to save up to 64% on your trip compared to booking a flight in the morning.

How much does it cost for a return flight from London Heathrow Airport to Kos?

Reviews of airlines servicing Kos

Get insights into the airlines that provide service to Kos. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kos. Reviews last updated 18 September 2025.
Check out reviews from past customers who have flown with Aegean Airlines, Lufthansa, andBritish Airways 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.

Entertainment

7.0

Food

7.4

Comfort

7.9

Overall

8.1

Boarding

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Entertainment

7.0

Food

7.4

Comfort

7.9

Overall

8.1

Boarding

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Entertainment

7.0

Food

7.4

Comfort

7.9

Overall

8.1

Boarding

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Entertainment

7.0

Food

7.4

Comfort

7.9

Overall

8.1

Boarding

7.8

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Nov 2024

SKG - FRA

I am very proud of them. Everything was very nice everything thank you

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • 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 3 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 10h 40m. Fly via SWISS or Austrian 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 Lufthansa. Our recent data shows that you can find tickets from as low as £132 on this airline. Additional options worth looking into are Aegean Airlines and British Airways, starting at £169 and £222 round-trip. Lufthansa is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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
Marmari
Kardamena

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Top 3 airlines flying from Heathrow to Kos

Discover the top 3 airlines that operate flights from Heathrow to Kos. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£132Average£203FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aegean AirlinesCheapest£169Average£251FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights
British AirwaysCheapest£222Average£408FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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

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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.

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!

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