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Cheap flights from London Heathrow Airport to Kos from £106

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KGS
26 Mar — 2 Apr1
1 adult

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 21 March 2025.

Round-trip from

£166

One-way from

£123

Popular in

December

Cheapest in

January

Average price

£204
Lufthansa
  • Lufthansa
  • 9/5-19/5
  • 2 total stops
  • 31h 00m total
  • London to Kos
Search Deals
Aegean Airlines
  • Aegean Airlines
  • 1/6
  • 1 total stop
  • 13h 45m total
  • London to Kos
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£8 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 21 March 2025.

Fri 9/518:40LHR - KGS
1 stop23h 15mMultiple Airlines
Mon 19/512:40KGS - LHR
1 stop7h 45mMultiple Airlines
Deal found 20/3£166
Fri 22/806:50LHR - KGS
1 stop7h 30mBrussels Airlines
Tue 26/811:15KGS - LHR
1 stop12h 20mBrussels Airlines
Deal found 21/3£170
Fri 9/520:05LHR - KGS
1 stop21h 50mSWISS
Thu 15/511:05KGS - LHR
1 stop10h 15mSWISS
Deal found 20/3£176
Wed 11/622:15LHR - KGS
1 stop10h 30mAegean Airlines
Mon 16/611:25KGS - LHR
1 stop8h 30mAegean Airlines
Deal found 20/3£196
Mon 5/520:25LHR - KGS
2 stops38h 15mLufthansa
Mon 12/512:40KGS - LHR
1 stop7h 45mLufthansa
Deal found 20/3£220
Fri 10/1006:00LHR - KGS
1 stop12h 50mAustrian Airlines
Sun 19/1010:00KGS - LHR
1 stop25h 00mAustrian Airlines
Deal found 20/3£295

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 21 March 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 9/5

18:40-19:55

1 stop23h 15m

Kos

Mon 19/5

12:40-18:25

1 stop7h 45m

£166

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 22/8

06:50-16:20

1 stop7h 30m

Kos

Tue 26/8

11:15-21:35

1 stop12h 20m

£170

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 9/5

20:05-19:55

1 stop21h 50m

Kos

Thu 15/5

11:05-19:20

1 stop10h 15m

£176

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 11/6

22:15-10:45

1 stop10h 30m

Kos

Mon 16/6

11:25-17:55

1 stop8h 30m

£196

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Mon 5/5

20:25-12:40

2 stops38h 15m

Kos

Mon 12/5

12:40-18:25

1 stop7h 45m

£220

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sat 10/5

22:15-17:30

1 stop17h 15m

£106

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Tue 9/9

20:30-16:45

1 stop18h 15m

£116

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 4/5

08:05-16:20

1 stop6h 15m

£129

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 4/6

09:00-19:05

1 stop8h 05m

£132

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Thu 28/8

20:05-10:15

2 stops36h 10m

£173

Flights are sorted by cheapest return flights first.

Deals found on 21/3

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 far ahead should I book a flight from London Heathrow Airport to Kos?

Use this chart to determine the optimal time to book a return flight from Heathrow to Kos. Price data was last updated on 14 March 2025.

The best time to book flights from London Heathrow Airport to Kos is 12 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 21 March 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 49% on your trip compared to booking a flight in the morning.

Rainfall in Kos by month

Plan your trip to Kos by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Kos ranges from 2.0 - 169.0 inches per month. January is typically the wettest month, when rainfall can reach 169.0 mm. July is typically the driest time to visit Kos when rainfall is around 2.0 mm.

Temperature in Kos by month

Plan your trip to Kos by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Kos, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 10.0 C).

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 21 March 2025.
Aegean Airlines
8.1
Very Good
726 reviews
Check prices

Entertainment

6.9

Boarding

7.8

Food

7.3

Comfort

7.8

Overall

8.1

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
Aegean Airlines
8.1
Very Good
726 reviews
Aegean Airlines
8.1
Very Good
726 reviews
Check prices

Entertainment

6.9

Boarding

7.8

Food

7.3

Comfort

7.8

Overall

8.1

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
SWISS
7.5
Good
1,567 reviews
Aegean Airlines
8.1
Very Good
726 reviews
Check prices

Entertainment

6.9

Boarding

7.8

Food

7.3

Comfort

7.8

Overall

8.1

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
Brussels Airlines
7.4
Good
344 reviews
Aegean Airlines
8.1
Very Good
726 reviews
Check prices

Entertainment

6.9

Boarding

7.8

Food

7.3

Comfort

7.8

Overall

8.1

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
Lufthansa
6.7
Okay
6,944 reviews
Aegean Airlines
8.1
Very Good
726 reviews
Check prices

Entertainment

6.9

Boarding

7.8

Food

7.3

Comfort

7.8

Overall

8.1

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
Eurowings
6.6
Okay
274 reviews
Aegean Airlines
8.1
Very Good
726 reviews
Check prices

Entertainment

6.9

Boarding

7.8

Food

7.3

Comfort

7.8

Overall

8.1

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 7 airlines. Kos is conveniently located just 12.8 mi from Kos’s city center.

  • 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 £176 on this airline. Additional options worth looking into are Aegean Airlines and Lufthansa, starting at £196 and £220 round-trip. SWISS is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from London Heathrow Airport to Kos one-way?

    The cheapet airlines for a one-way flight from London Heathrow Airport to Kos are Aegean Airlines (£123), Eurowings (£129), and Lufthansa (£132).

  • 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Kardamena
Marmari

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Alternative routes for Heathrow to Kos

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Heathrow to Kos

Discover the top 7 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 21 March 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£60Average£190FlexibilityNo cancel feeOn-time86%
Search easyJet flights
LufthansaCheapest£135Average£269FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£165Average£344FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Jet2Cheapest£176Average£269FlexibilityNo cancel feeOn-timeN/A
Search Jet2 flights
Aegean AirlinesCheapest£178Average£284FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights
British AirwaysCheapest£214Average£385FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EurowingsCheapest£223Average£365FlexibilityNo cancel feeOn-time87%
Search Eurowings flights

Fly with Cheapflights

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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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