$218 Cheap Flights from Helsinki (HEL) to Kos (KGS)

View $218 flight on Sat, May 2, 2026Opens in a new window

Popular airlines from Helsinki-Vantaa Airport (HEL) to Kos (KGS-Kos Island Intl.)

Cheap Flights from Helsinki to Kos (HEL-KGS)

Prices were available within the past 7 days and start at $218 for one-way flights and $570 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$570 Roundtrip, found 5 days ago
$570
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $570 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$651 Roundtrip, found 5 days ago
$651
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $651 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$804 Roundtrip, found 5 days ago
$804
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $804 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$885 Roundtrip, found 5 days ago
$885
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $885 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$934 Roundtrip, found 5 days ago
$934
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $934 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$966 Roundtrip, found 5 days ago
$966
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $966 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$998 Roundtrip, found 5 days ago
$998
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $998 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$1,015 Roundtrip, found 5 days ago
$1,015
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $1,015 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$1,232 Roundtrip, found 5 days ago
$1,232
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $1,232 found 5 days ago
Aegean
Sat, Nov 29 - Sat, Dec 6
HEL
Helsinki
KGS
Kos
$1,246 Roundtrip, found 5 days ago
$1,246
Roundtrip
found 5 days ago
Select Aegean flight, departing Sat, Nov 29 from Helsinki to Kos, returning Sat, Dec 6, priced at $1,246 found 5 days ago
Flights from Helsinki (HEL) to Kos (KGS)
Origin airport
Vantaa
Destination airport
Kos Island Intl.
Roundtrip price
$569
Distance
1627 mi

Helsinki to Kos Flights

The cheapest times to fly from Helsinki to Kos

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Helsinki to Kos are during the month of November. You can find some of the cheapest flights from Helsinki to Kos with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Helsinki to Kos

Sunday is one of the best days to book for cheap flights from Helsinki to Kos: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Helsinki to Kos

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Helsinki to Kos in 2025. You can also book with separate airlines for your outbound and return journeys, from $218 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Helsinki to Kos flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Helsinki to Kos airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS) cost?
Snag a cheap one-way flight from $218 or cheap return flight from $570 from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS)?
Flying in November is a good way to save, as it's the cheapest month for flights between HEL and KGS. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS)?
To find the cheapest airline that'll fly you from HEL to KGS, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS)?
There aren't any daily direct flights available from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from HEL to KGS?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS)?
To touch down at Kos Island Intl. Airport (KGS) without delays, pick a flight that takes off from Vantaa Airport (HEL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS) last-minute?
Last-minute bookings from HEL to KGS are generally more expensive. To lock in the lowest rates, start looking for flights ahead of time. That said, if you can play around with your travel dates, it's possible to land a cheap fare just before your departure.
Is it cheaper to book a HEL to KGS flight and hotel package?
Booking a HEL to KGS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our impressive range of accommodations and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Vantaa Airport (HEL) to Kos Island Intl. Airport (KGS)?
If you reserved your HEL to KGS flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.