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Cheap flights from London Heathrow Airport to Kos from £100

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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KGS
9 Jul — 16 Jul1
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
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 9 June 2026.

Tue 4/808:45
LHR
-
KGS
1 stop8h 55m
SWISS
Tue 11/820:30
KGS
-
LHR
1 stop13h 25m
SWISS
Deal found 8/6£175
Wed 1/706:55
LHR
-
KGS
1 stop10h 10m
Lufthansa
Mon 6/712:40
KGS
-
LHR
1 stop10h 05m
Lufthansa
Deal found 6/6£178
Wed 1/707:25
LHR
-
KGS
1 stop9h 40m
Multiple Airlines
Sun 5/711:25
KGS
-
LHR
1 stop7h 40m
Multiple Airlines
Deal found 7/6£178
Wed 1/709:00
LHR
-
KGS
1 stop8h 05m
Multiple Airlines
Thu 9/711:25
KGS
-
LHR
1 stop7h 40m
Multiple Airlines
Deal found 4/6£179
Sat 27/606:50
LHR
-
KGS
1 stop10h 45m
Brussels Airlines
Tue 7/711:25
KGS
-
LHR
1 stop7h 40m
Brussels Airlines
Deal found 4/6£180
Tue 8/919:30
LHR
-
KGS
1 stop23h 20m
Multiple Airlines
Tue 29/920:30
KGS
-
LHR
1 stop13h 25m
Multiple Airlines
Deal found 7/6£187
Sun 28/606:50
LHR
-
KGS
1 stop25h 35m
Brussels Airlines
Wed 1/711:25
KGS
-
LHR
1 stop7h 40m
Brussels Airlines
Deal found 8/6£187
Sun 28/606:50
LHR
-
KGS
1 stop25h 35m
Brussels Airlines
Wed 8/711:25
KGS
-
LHR
1 stop7h 40m
Brussels Airlines
Deal found 5/6£188
Sun 28/606:50
LHR
-
KGS
1 stop25h 35m
Brussels Airlines
Tue 7/711:25
KGS
-
LHR
1 stop7h 40m
Brussels Airlines
Deal found 4/6£189
Mon 29/617:50
LHR
-
KGS
1 stop14h 40m
Brussels Airlines
Mon 6/711:25
KGS
-
LHR
1 stop7h 40m
Brussels Airlines
Deal found 4/6£190
Wed 19/812:10
LHR
-
KGS
1 stop5h 45m
SWISS
Wed 26/820:40
KGS
-
LHR
1 stop13h 15m
SWISS
Deal found 7/6£190
Fri 3/720:05
LHR
-
KGS
1 stop21h 55m
SWISS
Wed 8/720:40
KGS
-
LHR
1 stop13h 15m
SWISS
Deal found 7/6£193

Find 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 9 June 2026.

Round-trip from

£175

One-way from

£100

Popular in

March

Cheapest in

April

Average price

£228
SWISS
  • SWISS
  • 4/8-11/8
  • 2 total stops
  • 22h 20m total
  • London to Kos
Search Deals
4/7
  • 4/7
  • 2 total stops
  • 22h 55m total
  • London to Kos
Search Deals
High demand for flights, 1% 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 June 2026
Search Deals

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 9 June 2026.
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 - KGS

LHRKGS

London Heathrow

Mon 29/6

17:50-10:30

1 stop14h 40m

Kos

Mon 6/7

11:25-17:05

1 stop7h 40m

£190

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 28/6

11:05-10:25

1 stop21h 20m

Kos

Mon 6/7

11:25-21:35

1 stop12h 10m

£201

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Thu 16/7

06:00-20:20

1 stop12h 20m

Kos

Thu 23/7

21:10-08:20

1 stop13h 10m

£304

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 26/6

22:15-08:50

1 stop8h 35m

Kos

Fri 3/7

13:05-17:55

1 stop6h 50m

£315
Fastest return journey

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sat 3/10

16:35-00:35

1 stop6h 00m

Kos

Sat 10/10

06:00-11:15

1 stop7h 15m

£316

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 3/7

06:00-20:50

1 stop12h 50m

Kos

Wed 8/7

21:40-14:05

2 stops18h 25m

£351

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sat 19/9

22:15-17:30

1 stop17h 15m

Kos

Mon 28/9

18:05-11:15

1 stop19h 10m

£352

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Tue 15/9

19:00-08:50

1 stop11h 50m

Kos

Fri 18/9

06:00-21:10

1 stop17h 10m

£354

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 16/9

22:15-08:50

1 stop8h 35m

Kos

Wed 30/9

15:20-11:15

2 stops21h 55m

£366

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sat 12/9

22:15-15:30

2 stops39h 15m

Kos

Thu 17/9

06:00-17:55

1 stop13h 55m

£368

Flights are sorted by cheapest return flights first.

Deals found on 7/6

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
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

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 9 June 2026.
Check out reviews from past customers who have flown with Aegean Airlines and Lufthansa 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
877 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.4

Overall

8.1

Boarding

7.8

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

mandy,Dec 2025

ATH - RIX

You get what you pay for! No food or entertainment but seats were comfortable
Aegean Airlines
8.1
Very Good
877 reviews
Aegean Airlines
8.1
Very Good
877 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.4

Overall

8.1

Boarding

7.8

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

mandy,Dec 2025

ATH - RIX

You get what you pay for! No food or entertainment but seats were comfortable
Lufthansa
6.8
Okay
8,049 reviews
Aegean Airlines
8.1
Very Good
877 reviews
Check prices

Entertainment

6.9

Crew

8.6

Food

7.4

Overall

8.1

Boarding

7.8

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

mandy,Dec 2025

ATH - RIX

You get what you pay for! No food or entertainment but seats were comfortable

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 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 8h 35m. Fly via Brussels Airlines, 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 Lufthansa. Our recent data shows that you can find tickets from as low as £135 on this airline. An additional option worth looking into is Aegean Airlines, starting at £222. Lufthansa is 47% 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
Kardamena

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Heathrow to Kos

Discover the top 2 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£130Average£176FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aegean AirlinesCheapest£222Average£294FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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!

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