Find flights
When to book
Airlines
FAQs

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 19/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — KGS
26 Feb — 5 Mar1
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 February 2025.

Round-trip from

£180

One-way from

£100

Popular in

December

Cheapest in

January

Average price

£254
Aegean Airlines
  • Aegean Airlines
  • 31/3-7/4
  • 2 total stops
  • 22h 10m total
  • London to Kos
Search Deals
Aegean Airlines
  • Aegean Airlines
  • 19/3
  • 1 total stop
  • 11h 50m total
  • London to Kos
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£7 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 February 2025.

Wed 9/709:00LHR - KGS
1 stop8h 05mMultiple Airlines
Sun 13/711:25KGS - LHR
1 stop12h 10mMultiple Airlines
Deal found 20/2£179
Mon 31/322:15LHR - KGS
1 stop10h 40mAegean Airlines
Mon 7/406:00KGS - LHR
1 stop11h 30mAegean Airlines
Deal found 20/2£180
Tue 29/720:25LHR - KGS
1 stop20h 40mLufthansa
Mon 4/812:40KGS - LHR
1 stop12h 00mLufthansa
Deal found 19/2£192
Tue 16/906:00LHR - KGS
1 stop11h 40mSWISS
Tue 23/920:30KGS - LHR
1 stop23h 20mSWISS
Deal found 20/2£208
Fri 12/907:45LHR - KGS
1 stop6h 35mBrussels Airlines
Wed 24/911:15KGS - LHR
1 stop12h 20mBrussels Airlines
Deal found 20/2£227
Fri 12/910:25LHR - KGS
1 stop8h 25mAustrian Airlines
Fri 19/921:40KGS - LHR
1 stop13h 20mAustrian Airlines
Deal found 20/2£293

Find flights from Heathrow to Kos within your budget

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 February 2025.

Fly from

Heathrow

Fly to

Kos

Route

Depart

Return

Price

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 9/7

09:00-19:05

1 stop8h 05m

Kos

Sun 13/7

11:25-21:35

1 stop12h 10m

£179

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Mon 31/3

22:15-10:55

1 stop10h 40m

Kos

Mon 7/4

06:00-15:30

1 stop11h 30m

£180

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Fri 9/5

16:30-08:50

1 stop14h 20m

Kos

Thu 15/5

19:30-08:40

1 stop15h 10m

£194

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 25/5

20:05-10:10

1 stop12h 05m

Kos

Sun 1/6

17:50-07:55

1 stop16h 05m

£276

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Sun 10/8

11:05-10:25

1 stop21h 20m

Kos

Thu 21/8

11:25-17:05

1 stop7h 40m

£286

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 19/3

22:15-12:05

1 stop11h 50m

£100

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 9/7

06:55-22:55

1 stop14h 00m

£102

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 4/6

07:25-19:05

1 stop9h 40m

£159

LondonKos

LHR - KGS

LHRKGS

London Heathrow

Wed 7/5

07:00-10:15

2 stops25h 15m

£167

Flights are sorted by cheapest return flights first.

Deals found on 20/2

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.

Travel insights for flights from Heathrow to Kos

Get recent, data-driven insights about flights from Heathrow to Kos including ideal travel times, pricing trends, and more.

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 February 2025.

The best time to book flights from London Heathrow Airport to Kos is 55 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 February 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 February 2025.
Aegean Airlines
8.1
Very Good
733 reviews
Check prices

Comfort

7.8

Crew

8.6

Food

7.3

Overall

8.1

Boarding

7.8

Entertainment

6.9

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
733 reviews
Aegean Airlines
8.1
Very Good
733 reviews
Check prices

Comfort

7.8

Crew

8.6

Food

7.3

Overall

8.1

Boarding

7.8

Entertainment

6.9

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
1,568 reviews
Aegean Airlines
8.1
Very Good
733 reviews
Check prices

Comfort

7.8

Crew

8.6

Food

7.3

Overall

8.1

Boarding

7.8

Entertainment

6.9

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
6,987 reviews
Aegean Airlines
8.1
Very Good
733 reviews
Check prices

Comfort

7.8

Crew

8.6

Food

7.3

Overall

8.1

Boarding

7.8

Entertainment

6.9

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 Aegean Airlines. Our recent data shows that you can find tickets from as low as £180 on this airline. Additional options worth looking into are Lufthansa and SWISS, starting at £194 and £299 round-trip. Aegean Airlines is 42% 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 London Heathrow Airport?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Kos

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Rhodes flights
Heathrow to Mykonos flights
Luton to Rhodes flights
Stansted to Rhodes flights
Heathrow to Rhodes flights
Heathrow to Santorini flights
Gatwick to Mykonos flights
London City to Rhodes flights
Gatwick to Santorini flights
London City to Mykonos flights
London City to Santorini flights
Luton to Mykonos flights
Stansted to Mykonos flights
Luton to Santorini flights
Gatwick to Kos flights
Stansted to Kos flights
Stansted to Santorini flights
London City to Kos flights
Heathrow to Parikia flights
Gatwick to Parikia flights
Luton to Kos flights
Heathrow to Naxos flights
Gatwick to Naxos flights
Luton to Parikia flights
Stansted to Parikia flights
Stansted to Naxos flights
Heathrow to Paleochori flights
Luton to Naxos flights
London City to Naxos flights
Gatwick to Kálymnos flights
Gatwick to Paleochori flights
Southend to Rhodes flights
Luton to Paleochori flights
Heathrow to Karpathos flights
Southend to Kos flights
Luton to Karpathos flights
Heathrow to Parthéni flights
Southend to Mykonos flights
Gatwick to Karpathos flights

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 February 2025.
AirlineCheapestAverageFlexibilityOn-time
easyJetCheapest£61Average£191FlexibilityNo cancel feeOn-time86%
Search easyJet flights
LufthansaCheapest£139Average£324FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
SWISSCheapest£170Average£354FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Jet2Cheapest£181Average£277FlexibilityNo cancel feeOn-timeN/A
Search Jet2 flights
Aegean AirlinesCheapest£183Average£292FlexibilityNo cancel feeOn-time87%
Search Aegean Airlines flights
British AirwaysCheapest£207Average£392FlexibilityNo cancel feeOn-time70%
Search British Airways flights
EurowingsCheapest£229Average£375FlexibilityNo cancel feeOn-time87%
Search Eurowings 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!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.