What is the difference between the most popular and the most frequent airline at Kos?

United Airlines operates the most flights from the United States to Kos at 0 per week, while SWISS is the airline most often selected by KAYAK users searching for flights from the United States to Kos. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveler choice.

Where can I fly from to get the cheapest fares to Kos?

Based on fares booked in the past 5 days, the cheapest flights to Kos are from: • New York, from $677 round-trip

How do I know if a flight to Kos is a good deal?

A good deal on a flight to Kos is around $1,005 round-trip. This fare is in the lowest 25% of round-trip prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

How expensive are last-minute flights to Kos?

Last-minute fares to Kos – booked within 2 weeks of departure – run 9% below the average round-trip fare of $1,198. Booking late can sometimes save money, but inventory is limited.

What are the most popular airlines flying to Kos?

SWISS is the most popular airline flying to Kos among KAYAK users, followed by Lufthansa and Austrian Airlines.

$307 CHEAP FLIGHTS to Kos in 2026

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Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$677

Typical prices: $1,005-$1,459

Lufthansa, SWISS

Thu 10/25Thu 11/1

JFK - KGS • 1 stop

Cheapest one-way

$307

Typical prices: $539-$802

Multiple Airlines

Mon 10/1

BOS - KGS • 2 stops

Top airlines

Aegean Airlines

Best reviews • 8.2 score

Airline reviews

Top routes

MIA - KGS

Cheapest • 29% average savings

NYC - KGS

Most popular

Insights

When to book

26 weeks

in advance

Our data shows that travelers who book at least 26 weeks in advance save around 30% compared to booking last minute.

Insights

When to travel

January

Cheapest • 51% price drop

July

Most popular

Good to know

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Kos!

Flight Deals

Cheap Flights to Kos

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

All Flight Deals

Recent round-trip flight deals to Kos

Sun, Oct 25 - Sun, Nov 1

6:30 pm - 11:45 amJFK New York John F Kennedy Intl-KGS Kos

11h 15m1 stop Munich Franz Josef Strauss

10:40 am - 1:15 pmKGS Kos-JFK New York John F Kennedy Intl

33h 35m1 stop Zurich

$677Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

8:35 pm - 9:50 amJFK New York John F Kennedy Intl-KGS Kos

55h 15m2 stops Geneva Geneve-Cointrin Zurich

11:00 am - 1:15 pmKGS Kos-JFK New York John F Kennedy Intl

33h 15m1 stop Zurich

$714SWISS

Wed, Oct 28 - Wed, Nov 4

8:35 pm - 10:35 amJFK New York John F Kennedy Intl-KGS Kos

56h 00m2 stops Geneva Geneve-Cointrin Zurich

2:20 pm - 1:15 pmKGS Kos-JFK New York John F Kennedy Intl

29h 55m2 stops Rhodes Diagoras Zurich

$762SWISS

Tue, Oct 6 - Wed, Oct 14

10:05 pm - 8:05 amJFK New York John F Kennedy Intl-KGS Kos

27h 00m3 stops Lisbon Humberto Delgado Milan Malpensa Athens Eleftherios V.

10:25 pm - 8:05 pmKGS Kos-JFK New York John F Kennedy Intl

28h 40m3 stops Athens Eleftherios V. Milan Malpensa Lisbon Humberto Delgado

$845Multiple Airlines

Sat, Sep 26 - Sun, Oct 4

6:20 pm - 9:45 pmJFK New York John F Kennedy Intl-KGS Kos

20h 25m1 stop London Gatwick

10:10 pm - 10:00 pmKGS Kos-JFK New York John F Kennedy Intl

30h 50m2 stops London Stansted Madrid Barajas

$860Multiple Airlines

Tue, Oct 6 - Wed, Oct 14

5:40 pm - 8:50 pmEWR Newark-KGS Kos

20h 10m1 stop Vienna Intl

9:40 pm - 1:55 pmKGS Kos-EWR Newark

23h 15m1 stop Vienna Intl

$866Austrian Airlines

Tue, Oct 6 - Wed, Oct 14

8:30 pm - 7:05 pmEWR Newark-KGS Kos

15h 35m1 stop Munich Franz Josef Strauss

7:55 pm - 3:45 pmKGS Kos-EWR Newark

26h 50m2 stops Munich Franz Josef Strauss Frankfurt am Main

$928Lufthansa

Tue, Oct 6 - Wed, Oct 14

5:30 pm - 7:05 pmJFK New York John F Kennedy Intl-KGS Kos

18h 35m1 stop Munich Franz Josef Strauss

7:55 pm - 8:05 pmKGS Kos-JFK New York John F Kennedy Intl

31h 10m2 stops Munich Franz Josef Strauss Frankfurt am Main

$928Lufthansa

Sat, Oct 10 - Sun, Oct 18

4:15 pm - 2:30 pmJFK New York John F Kennedy Intl-KGS Kos

15h 15m1 stop Zurich

3:15 pm - 2:20 pmKGS Kos-JFK New York John F Kennedy Intl

30h 05m2 stops Zurich Geneva Geneve-Cointrin

$949SWISS

Wed, Oct 28 - Wed, Nov 4

11:00 pm - 10:35 amEWR Newark-KGS Kos

53h 35m2 stops London Heathrow Zurich

2:20 pm - 8:30 pmKGS Kos-EWR Newark

37h 10m2 stops Rhodes Diagoras Zurich

$961SWISS

Recent last minute flight deals to Kos

Tue, Sep 15 - Mon, Oct 5

5:30 pm - 7:05 pmLAX Los Angeles Los Angeles-KGS Kos

15h 35m1 stop Munich Franz Josef Strauss

11:00 am - 4:30 pmKGS Kos-LAX Los Angeles Los Angeles

39h 30m1 stop Zurich

$962Multiple Airlines

Tue, Sep 15 - Mon, Oct 5

3:05 pm - 8:50 pmLAX Los Angeles Los Angeles-KGS Kos

19h 45m1 stop Vienna Intl

8:50 pm - 5:37 pmKGS Kos-LAX Los Angeles Los Angeles

30h 47m2 stops Vienna Intl Chicago O'Hare Intl

$971Austrian Airlines

Tue, Sep 15 - Mon, Oct 5

8:15 am - 8:50 pmLAX Los Angeles Los Angeles-KGS Kos

26h 35m2 stops Chicago O'Hare Intl Vienna Intl

8:50 pm - 5:37 pmKGS Kos-LAX Los Angeles Los Angeles

30h 47m2 stops Vienna Intl Chicago O'Hare Intl

$975Austrian Airlines

Tue, Sep 15 - Mon, Oct 5

5:30 pm - 8:50 pmLAX Los Angeles Los Angeles-KGS Kos

17h 20m2 stops Munich Franz Josef Strauss Vienna Intl

8:50 pm - 5:37 pmKGS Kos-LAX Los Angeles Los Angeles

30h 47m2 stops Vienna Intl Chicago O'Hare Intl

$978Austrian Airlines

Tue, Sep 15 - Mon, Oct 5

11:18 am - 8:55 pmLAX Los Angeles Los Angeles-KGS Kos

23h 37m2 stops Orlando London Gatwick

9:45 pm - 11:51 pmKGS Kos-LAX Los Angeles Los Angeles

36h 06m3 stops London Gatwick Orlando Dallas/Fort Worth

$3,410Multiple Airlines

Tue, Sep 15 - Mon, Oct 5

11:18 am - 8:55 pmLAX Los Angeles Los Angeles-KGS Kos

23h 37m2 stops Orlando London Gatwick

9:45 pm - 11:51 pmKGS Kos-LAX Los Angeles Los Angeles

36h 06m3 stops London Gatwick Orlando Dallas/Fort Worth

$3,662Multiple Airlines

Tue, Sep 15 - Mon, Oct 5

8:00 am - 8:55 pmLAX Los Angeles Los Angeles-KGS Kos

26h 55m3 stops Dallas/Fort Worth Orlando London Gatwick

9:45 pm - 10:59 pmKGS Kos-LAX Los Angeles Los Angeles

35h 14m3 stops London Gatwick Orlando Dallas/Fort Worth

$4,856Multiple Airlines

Tue, Sep 15 - Mon, Oct 5

8:00 am - 8:55 pmLAX Los Angeles Los Angeles-KGS Kos

26h 55m3 stops Dallas/Fort Worth Orlando London Gatwick

9:45 pm - 10:59 pmKGS Kos-LAX Los Angeles Los Angeles

35h 14m3 stops London Gatwick Orlando Dallas/Fort Worth

$5,078Multiple Airlines

All round-trip flight deals to Kos

Sun, Oct 25 - Sun, Nov 1

6:30 pm - 11:45 amJFK New York John F Kennedy Intl-KGS Kos

11h 15m1 stop Munich Franz Josef Strauss

10:40 am - 1:15 pmKGS Kos-JFK New York John F Kennedy Intl

33h 35m1 stop Zurich

$677Multiple Airlines

Sun, Oct 25 - Sun, Nov 1

8:35 pm - 9:50 amJFK New York John F Kennedy Intl-KGS Kos

55h 15m2 stops Geneva Geneve-Cointrin Zurich

11:00 am - 1:15 pmKGS Kos-JFK New York John F Kennedy Intl

33h 15m1 stop Zurich

$714SWISS

Wed, Oct 28 - Wed, Nov 4

8:35 pm - 10:35 amJFK New York John F Kennedy Intl-KGS Kos

56h 00m2 stops Geneva Geneve-Cointrin Zurich

2:20 pm - 1:15 pmKGS Kos-JFK New York John F Kennedy Intl

29h 55m2 stops Rhodes Diagoras Zurich

$762SWISS

Tue, Oct 6 - Wed, Oct 14

10:05 pm - 8:05 amJFK New York John F Kennedy Intl-KGS Kos

27h 00m3 stops Lisbon Humberto Delgado Milan Malpensa Athens Eleftherios V.

10:25 pm - 8:05 pmKGS Kos-JFK New York John F Kennedy Intl

28h 40m3 stops Athens Eleftherios V. Milan Malpensa Lisbon Humberto Delgado

$845Multiple Airlines

Sat, Sep 26 - Sun, Oct 4

6:20 pm - 9:45 pmJFK New York John F Kennedy Intl-KGS Kos

20h 25m1 stop London Gatwick

10:10 pm - 10:00 pmKGS Kos-JFK New York John F Kennedy Intl

30h 50m2 stops London Stansted Madrid Barajas

$860Multiple Airlines

Tue, Oct 6 - Wed, Oct 14

5:40 pm - 8:50 pmEWR Newark-KGS Kos

20h 10m1 stop Vienna Intl

9:40 pm - 1:55 pmKGS Kos-EWR Newark

23h 15m1 stop Vienna Intl

$866Austrian Airlines

Tue, Oct 6 - Wed, Oct 14

8:30 pm - 7:05 pmEWR Newark-KGS Kos

15h 35m1 stop Munich Franz Josef Strauss

7:55 pm - 3:45 pmKGS Kos-EWR Newark

26h 50m2 stops Munich Franz Josef Strauss Frankfurt am Main

$928Lufthansa

Tue, Oct 6 - Wed, Oct 14

5:30 pm - 7:05 pmJFK New York John F Kennedy Intl-KGS Kos

18h 35m1 stop Munich Franz Josef Strauss

7:55 pm - 8:05 pmKGS Kos-JFK New York John F Kennedy Intl

31h 10m2 stops Munich Franz Josef Strauss Frankfurt am Main

$928Lufthansa

Sat, Oct 10 - Sun, Oct 18

4:15 pm - 2:30 pmJFK New York John F Kennedy Intl-KGS Kos

15h 15m1 stop Zurich

3:15 pm - 2:20 pmKGS Kos-JFK New York John F Kennedy Intl

30h 05m2 stops Zurich Geneva Geneve-Cointrin

$949SWISS

Wed, Oct 28 - Wed, Nov 4

11:00 pm - 10:35 amEWR Newark-KGS Kos

53h 35m2 stops London Heathrow Zurich

2:20 pm - 8:30 pmKGS Kos-EWR Newark

37h 10m2 stops Rhodes Diagoras Zurich

$961SWISS

Booking Insights

Price, demand and travel trends for United States to Kos flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from the United States to Kos with more confidence.

Prices

Airlines

What is the cheapest flight to Kos?

New York John F Kennedy Intl Airport to Kos is the cheapest route at $677 round-trip, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

How much is a flight to Kos?

A round-trip flight to Kos costs $1,198 on average, based on data over the past 12 months on KAYAK. Round-trip fares from Miami average $881, while San Francisco runs a bit higher at $901.

What is the cheapest day to fly to Kos?

Tuesday is the cheapest day to fly to Kos at $1,099 round-trip on average over the past 12 months on KAYAK. Wednesday is the most expensive at $1,358.

What is the cheapest month to fly to Kos?

January is the cheapest month to fly to Kos with an average price of $591 round-trip.
May ($1,391) and June ($1,360) are the most expensive.
Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to Kos?

Night flights to Kos are the cheapest at $1,146 round-trip on average. Morning flights are the most expensive at $1,452.

What is a good deal for flights to Kos?

Flights under $1,005 are considered a good deal. 25% of KAYAK users found round-trip flights to Kos at or below these prices, with the lowest fares from:

Miami $831
San Francisco $901
Phoenix Sky Harbor Intl Airport $980

When are flights to Kos the cheapest?

Flights to Kos are cheapest 26 weeks before departure. Booking in this window typically costs about 30% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Expert advice

Our travel experts

Duncan Madden

Expert on British Airways

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Emily Zemler

Expert on SWISS

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Low season	February
High season	July
Cheapest flight	$307

Best time to beat the crowds but there is an average 8% increase in price.

Most popular time to fly and prices are also 6% lower on average.

Flight from Boston to Kos

When to book flights to Kos

Are your dates flexible? Find out the best times to travel to Kos based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. The information is for flights to Kos based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the difference between the most popular and the most frequent airline at Kos?
United Airlines operates the most flights from the United States to Kos at 0 per week, while SWISS is the airline most often selected by KAYAK users searching for flights from the United States to Kos. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveler choice.
Where can I fly from to get the cheapest fares to Kos?
Based on fares booked in the past 5 days, the cheapest flights to Kos are from:
• New York, from $677 round-trip
How do I know if a flight to Kos is a good deal?
A good deal on a flight to Kos is around $1,005 round-trip. This fare is in the lowest 25% of round-trip prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.
How expensive are last-minute flights to Kos?
Last-minute fares to Kos – booked within 2 weeks of departure – run 9% below the average round-trip fare of $1,198. Booking late can sometimes save money, but inventory is limited.

For the best chance at a low fare to Kos, aim to book around 26 weeks before you fly. That window historically saves about 30% versus last-minute pricing based on KAYAK booking data over the last 12 months.
For flights to Kos, recent KAYAK data shows that stronger deals tend to land around $1,005 round-trip. If you see a fare below that threshold, it's a strong deal – book before the price climbs back up.
If you can choose when to go, time your trip to Kos around January. Round-trip fares historically average $591 that month – typically the cheapest month to travel based on the last 12 months.
Before you book:

• Check the route's typical price range so you can spot a deal.
• Confirm baggage fees and seat-selection costs on budget carriers.
• Verify whether you need any travel documents beyond ID.
• Pick a departure airport, since your nearest may not be the cheapest origin.
Shift your departure to evening to save up to $306 per round-trip. Evening flights to Kos average $1,146 compared to $1,452 for morning flights. See the time-of-day chart above for the full breakdown.

Kardamena

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KGS

$307 Find Cheap Flights to Kos - Compare and Save

Everything you should know

Cheap Flights to Kos

Recent round-trip flight deals to Kos

Recent one-way flight deals to Kos

Recent last minute flight deals to Kos

All round-trip flight deals to Kos

Price, demand and travel trends for United States to Kos flights

What is the cheapest flight to Kos?

How much is a flight to Kos?

What is the cheapest day to fly to Kos?

What is the cheapest month to fly to Kos?

What is the cheapest time of day to fly to Kos?

What is a good deal for flights to Kos?

When are flights to Kos the cheapest?

What are the most popular airlines flying to Kos?

Expert advice for your flight to Kos

Key details for flights to Kos

Low season

High season

Cheapest flight

When to book flights to Kos

Your questions about flights to Kos, answered

Your guide to booking Kos flights

Traveling to a place near Kos?

More options for your flight to Kos

Complete your trip to Kos with a hotel stay or car rental

Information on the airport you'll fly into in Kos

Cabin class types available on flights to Kos

Find direct flights for Kos

Flights from local origins to Kos

Flights to other popular destinations