$354 Cheap Flights from Newark Liberty Intl. Airport (EWR) to Kos (KGS)

View $354 flight on Tue, Oct 20, 2026Opens in a new window

Popular airlines from Newark Liberty Intl. Airport (EWR) to Kos (KGS-Kos Island Intl.)

Cheap Flights from Newark Liberty Intl. Airport to Kos (EWR-KGS)

Prices were available within the past 7 days and start at $354 for one-way flights and $667 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Sep 3 - Thu, Sep 10
EWR
New York
KGS
Kos
$667 Roundtrip, found 6 days ago
$667
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Sep 3 from New York to Kos, returning Thu, Sep 10, priced at $667 found 6 days ago
Air Canada
Thu, Sep 3 - Thu, Sep 10
EWR
New York
KGS
Kos
$679 Roundtrip, found 6 days ago
$679
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Sep 3 from New York to Kos, returning Thu, Sep 10, priced at $679 found 6 days ago
Swiss International Air Lines
Tue, Sep 29 - Mon, Oct 12
EWR
New York
KGS
Kos
$692 Roundtrip, found 19 hours ago
$692
Roundtrip
found 19 hours ago
Select Swiss International Air Lines flight, departing Tue, Sep 29 from New York to Kos, returning Mon, Oct 12, priced at $692 found 19 hours ago
United
Thu, Sep 3 - Thu, Sep 10
EWR
New York
KGS
Kos
$697 Roundtrip, found 6 days ago
$697
Roundtrip
found 6 days ago
Select United flight, departing Thu, Sep 3 from New York to Kos, returning Thu, Sep 10, priced at $697 found 6 days ago
United
Thu, Sep 3 - Thu, Sep 10
EWR
New York
KGS
Kos
$705 Roundtrip, found 6 days ago
$705
Roundtrip
found 6 days ago
Select United flight, departing Thu, Sep 3 from New York to Kos, returning Thu, Sep 10, priced at $705 found 6 days ago
Lufthansa
Tue, Sep 29 - Mon, Oct 12
EWR
New York
KGS
Kos
$715 Roundtrip, found 19 hours ago
$715
Roundtrip
found 19 hours ago
Select Lufthansa flight, departing Tue, Sep 29 from New York to Kos, returning Mon, Oct 12, priced at $715 found 19 hours ago
Lufthansa
Tue, Sep 29 - Mon, Oct 12
EWR
New York
KGS
Kos
$725 Roundtrip, found 19 hours ago
$725
Roundtrip
found 19 hours ago
Select Lufthansa flight, departing Tue, Sep 29 from New York to Kos, returning Mon, Oct 12, priced at $725 found 19 hours ago
Lufthansa
Tue, Sep 29 - Mon, Oct 12
EWR
New York
KGS
Kos
$737 Roundtrip, found 19 hours ago
$737
Roundtrip
found 19 hours ago
Select Lufthansa flight, departing Tue, Sep 29 from New York to Kos, returning Mon, Oct 12, priced at $737 found 19 hours ago
Swiss International Air Lines
Tue, Sep 29 - Mon, Oct 12
EWR
New York
KGS
Kos
$740 Roundtrip, found 19 hours ago
$740
Roundtrip
found 19 hours ago
Select Swiss International Air Lines flight, departing Tue, Sep 29 from New York to Kos, returning Mon, Oct 12, priced at $740 found 19 hours ago
Austrian Airlines
Tue, Sep 29 - Mon, Oct 12
EWR
New York
KGS
Kos
$836 Roundtrip, found 19 hours ago
$836
Roundtrip
found 19 hours ago
Select Austrian Airlines flight, departing Tue, Sep 29 from New York to Kos, returning Mon, Oct 12, priced at $836 found 19 hours ago

Alternative airports near Kos

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Kos Island Intl. KGS. Cheapest and Closest option available. Average driving time to city center is 25 minutes. Flights from $3,359
KGS
Kos Island Intl.
CheapestClosest
Average driving time to city center25 min
Flights from $3,359
Flights from Newark Liberty Intl. Airport (EWR) to Kos (KGS)
Origin airport
Newark Liberty Intl. Airport
Destination airport
Kos Island Intl.
Airlines serving
Aegean, Austrian Airlines, British Airways, Emirates, Lufthansa, Swiss International Air Lines
Roundtrip price
$667
Distance
5127 mi

Newark Liberty Intl. Airport to Kos Flights

The cheapest times to fly from Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport to Kos are during the month of September. You can find some of the cheapest flights from Newark Liberty Intl. Airport to Kos with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Newark Liberty Intl. Airport to Kos

Sunday is one of the best days to book for cheap flights from Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport to Kos in 2026. You can also book with separate airlines for your outbound and return journeys, from $354 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 Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport 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 Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS) cost?
Snag a cheap one-way flight from $354 or cheap return flight from $667 from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS)?
September is the most affordable month to fly from EWR to KGS. Traveling during an off-peak travel window is often the key to better flight prices.
What is the cheapest airline that flies from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS)?
To find the cheapest airline that'll fly you from EWR to KGS, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS)?
You'll have to hop on a flight with a layover if you're traveling from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from EWR to KGS?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS)?
To touch down at Kos Island Intl. Airport (KGS) on schedule, book a flight that takes off from Liberty Intl. Airport (EWR) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS) last-minute?
Last-minute bookings from EWR to KGS are generally more expensive. For the best rates, start looking for flights as soon as possible. That being said, if you're flexible with your travel dates, it's possible to find a cheap fare just before your departure.
Is it cheaper to book an EWR to KGS flight and hotel package?
Compared with arranging hotels and flights separately, booking an EWR to KGS flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place will take the hassle out of planning your trip. Just secure your flights and choose from our extensive range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Liberty Intl. Airport (EWR) to Kos Island Intl. Airport (KGS)?
Generally, it's possible to reschedule or cancel your EWR to KGS flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.