$647 Cheap Flights from Columbus (CMH) to Kos (KGS)

View $647 flight on Thu, May 14, 2026Opens in a new window

Popular airlines from John Glenn Columbus Intl. Airport (CMH) to Kos (KGS-Kos Island Intl.)

Cheap Flights from Columbus to Kos (CMH-KGS)

Prices were available within the past 7 days and start at $647 for one-way flights and $1,120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,120 Roundtrip, found 5 days ago
$1,120
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,120 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,126 Roundtrip, found 5 days ago
$1,126
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,126 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,255 Roundtrip, found 5 days ago
$1,255
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,255 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,262 Roundtrip, found 5 days ago
$1,262
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,262 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,266 Roundtrip, found 5 days ago
$1,266
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,266 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,273 Roundtrip, found 5 days ago
$1,273
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,273 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,277 Roundtrip, found 5 days ago
$1,277
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,277 found 5 days ago
Air Canada
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,290 Roundtrip, found 5 days ago
$1,290
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,290 found 5 days ago
Brussels Airlines
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,325 Roundtrip, found 5 days ago
$1,325
Roundtrip
found 5 days ago
Select Brussels Airlines flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,325 found 5 days ago
Lufthansa
Thu, May 14 - Sun, May 24
CMH
Columbus
KGS
Kos
$1,428 Roundtrip, found 5 days ago
$1,428
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Thu, May 14 from Columbus to Kos, returning Sun, May 24, priced at $1,428 found 5 days ago
Flights from Columbus (CMH) to Kos (KGS)
Origin airport
John Glenn Columbus Intl.
Destination airport
Kos Island Intl.
Roundtrip price
$1,120
Distance
5519 mi

Columbus to Kos Flights

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

 

The best time to book a flight from Columbus to Kos

Sunday is one of the best days to book for cheap flights from Columbus 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 Columbus 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 Columbus to Kos in 2025. You can also book with separate airlines for your outbound and return journeys, from $647 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 Columbus 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 Columbus 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 John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS) cost?
Get a cheap one-way flight from $647 or cheap return flight from $1,120 from John Glenn Columbus Intl. Airport (CMH) 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 John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS)?
May is the cheapest month to fly from CMH to KGS. Timing your trip outside of the busy season is often the key to finding better deals on flights.
What is the cheapest airline that flies from John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll fly you from CMH to KGS. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS)?
Direct flights from John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CMH to KGS?
You'll typically find Tuesday the quietest day for flights, while Fridays are often 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 John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS)?
To avoid possible delays on the John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS) route, aim to fly before 3 PM. Later departures have a 22% higher chance of cancellation.**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 John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS) last-minute?
Last-minute bookings from CMH to KGS are typically more expensive. To secure the lowest rates, start searching for flights well in advance. That being said, if you're flexible with your travel dates, you may land a cheap fare just before your departure.
Is it cheaper to book a CMH to KGS flight and hotel package?
You'll generally save money by securing a CMH to KGS flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal accommodations and flights, you can add extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from John Glenn Columbus Intl. Airport (CMH) to Kos Island Intl. Airport (KGS)?
In most instances, you can modify or cancel your CMH to KGS flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.