Cheap flights from London Heathrow Airport to Kos from £99

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KGS
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Heathrow to Kos

Enter your travel dates to find the best prices.

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 31 October 2025.

Thu 4/1219:00LHR - KGS
1 stop20h 05mAegean Airlines
Thu 11/1216:40KGS - LHR
1 stop6h 35mAegean Airlines
Deal found 30/10£169
Sun 30/1122:15LHR - KGS
1 stop7h 50mAegean Airlines
Sun 7/1221:05KGS - LHR
1 stop26h 10mAegean Airlines
Deal found 31/10£194
Sun 14/1222:15LHR - KGS
1 stop7h 50mAegean Airlines
Sun 21/1221:05KGS - LHR
1 stop26h 10mAegean Airlines
Deal found 30/10£233
Sat 8/1122:15LHR - KGS
1 stop11h 50mAegean Airlines
Sun 16/1121:05KGS - LHR
1 stop16h 05mAegean Airlines
Deal found 30/10£244
Thu 4/1220:15LHR - KGS
2 stops18h 50mMultiple Airlines
Thu 11/1220:35KGS - LHR
2 stops21h 15mMultiple Airlines
Deal found 30/10£269
Sun 2/1122:15LHR - KGS
1 stop11h 35mAegean Airlines
Tue 11/1116:40KGS - LHR
1 stop6h 35mAegean Airlines
Deal found 30/10£289
Sun 30/1106:00LHR - KGS
2 stops9h 05mMultiple Airlines
Sun 7/1221:05KGS - LHR
2 stops22h 00mMultiple Airlines
Deal found 31/10£307

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 31 October 2025.

Round-trip from

£169

One-way from

£99

Popular in

December

Cheapest in

April

Average price

£271
Aegean Airlines
  • Aegean Airlines
  • 4/12-11/12
  • 2 total stops
  • 26h 40m total
  • London to Kos
Aegean Airlines
  • Aegean Airlines
  • 15/4
  • 1 total stop
  • 12h 20m total
  • London to Kos
Highest demand for flights based on searches. 10% potential increase in price (£24 potential increase over avg. return price).
Cheapest flight prices on average. 8% potential price decrease (£17 potential savings vs. average return price).
Average for round-trip flights in October 2025

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 31 October 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

Sun 14/12

22:15-08:05

1 stop7h 50m

Kos

Sun 21/12

21:05-21:15

1 stop26h 10m

£233

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sat 4/4

16:35-00:35

1 stop6h 00m

Kos

Mon 20/4

13:05-21:10

1 stop10h 05m

£233

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 5/4

22:15-00:35

1 stop24h 20m

Kos

Sun 19/4

09:20-21:10

1 stop13h 50m

£245

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sat 4/4

16:35-00:35

1 stop6h 00m

Kos

Fri 17/4

13:05-17:55

1 stop6h 50m

£251

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 30/11

22:15-08:05

1 stop7h 50m

Kos

Sun 7/12

19:55-11:10

2 stops17h 15m

£253

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Thu 4/12

20:15-17:05

2 stops18h 50m

Kos

Thu 11/12

20:35-15:50

2 stops21h 15m

£269

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Mon 6/4

22:15-12:35

1 stop12h 20m

Kos

Tue 21/4

13:05-17:55

1 stop6h 50m

£279

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Mon 6/4

22:15-08:50

1 stop8h 35m

Kos

Fri 17/4

13:05-21:10

1 stop10h 05m

£279

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Mon 6/4

22:15-08:50

1 stop8h 35m

Kos

Mon 20/4

13:05-21:10

1 stop10h 05m

£279

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Tue 7/4

19:00-12:35

1 stop15h 35m

Kos

Fri 17/4

13:05-21:10

1 stop10h 05m

£279

Flights are sorted by cheapest return flights first.

Deals found on 29/10

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 31 October 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 71% on your trip compared to booking a flight in the morning.

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 31 October 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.

Food

7.4

Boarding

7.8

Comfort

7.9

Overall

8.1

Entertainment

6.9

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

Food

7.4

Boarding

7.8

Comfort

7.9

Overall

8.1

Entertainment

6.9

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

Food

7.4

Boarding

7.8

Comfort

7.9

Overall

8.1

Entertainment

6.9

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

Food

7.4

Boarding

7.8

Comfort

7.9

Overall

8.1

Entertainment

6.9

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 7h 50m. 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 Lufthansa. Our recent data shows that you can find tickets from as low as £136 on this airline. Additional options worth looking into are Aegean Airlines and British Airways, starting at £175 and £244 round-trip. Lufthansa is 49% 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 31 October 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£136Average£210FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aegean AirlinesCheapest£175Average£283FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights
British AirwaysCheapest£244Average£456FlexibilityNo 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?

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