In terms of precipitation, rainfall in Kos ranges from 0.1 - 6.7 inches per month. January is typically the wettest month, when rainfall can reach 6.7 in. July is typically the driest time to visit Kos when rainfall is around 0.1 in.

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 78.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 50.0 F).

What is the cheapest time of day to fly from IL to KGS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Kos as you normally would.

What airport do you fly into for flights to Kos from Illinois?

Located just 12.8 mi from the city center, Kos (KGS) is the airport most travelers will use when flying to Kos from Illinois.

Can I find deals for flights from Illinois to Kos that include hotel bookings?

Yes. In addition to deals on Illinois to Kos flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Illinois to Kos?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Kos.

Can I find deals for business class flights from Illinois to Kos?

Yes. Cheapflights offers flight deals from Illinois 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.

$626+ Flights from Illinois to Kos

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Cheap flight deals from Illinois to Kos

Round-trip from	$779 (SWISS)
One-way from	$626 (Flightnetwork)

From Illinois to Kos

Search Deals

One-way flight from Illinois to Kos

Search Deals

Find flight deals from Illinois to Kos

Cheapest flights from Illinois to Kos
Explore the most affordable flight options available from Illinois to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

Thu 8/142:20 pmORD - KGS

1 stop16h 50mSWISS

Wed 8/208:40 pmKGS - ORD

1 stop27h 15mSWISS

Deal found 6/24

$779

Fri 10/109:40 pmORD - KGS

1 stop13h 45mLufthansa

Mon 10/2712:40 pmKGS - ORD

2 stops41h 10mLufthansa

Deal found 6/25

$805

Thu 8/149:40 pmORD - KGS

2 stops27h 10mMultiple Airlines

Wed 8/208:40 pmKGS - ORD

1 stop23h 30mMultiple Airlines

Deal found 6/24

$819

Sun 8/104:20 pmORD - KGS

1 stop19h 40mAustrian Airlines

Sun 8/1710:00 amKGS - ORD

1 stop35h 20mAustrian Airlines

Deal found 6/25

$1,245

Best flights from Illinois to Kos
Discover carefully curated flight deals from Illinois to Kos that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 26, 2025.

Thu 8/142:20 pmORD - KGS

1 stop16h 50mSWISS

Wed 8/208:40 pmKGS - ORD

1 stop27h 15mSWISS

Deal found 6/24

$779

Thu 8/149:40 pmORD - KGS

2 stops27h 10mMultiple Airlines

Wed 8/208:40 pmKGS - ORD

1 stop23h 30mMultiple Airlines

Deal found 6/24

$819

Thu 8/149:40 pmORD - KGS

2 stops27h 10mLufthansa

Wed 8/207:55 pmKGS - ORD

2 stops25h 00mLufthansa

Deal found 6/24

$981

Sun 8/104:20 pmORD - KGS

1 stop19h 40mAustrian Airlines

Sun 8/1710:00 amKGS - ORD

1 stop35h 20mAustrian Airlines

Deal found 6/25

$1,245

Last-minute flights from Illinois to Kos
Discover last-minute flight deals from Illinois to Kos. Data last updated June 26, 2025 and is based on user searches.

Thu 7/246:00 pmORD - KGS

3 stops30h 50mMultiple Airlines

Tue 7/296:00 amKGS - ORD

3 stops35h 40mMultiple Airlines

Deal found 6/25

$1,217

Thu 7/242:20 pmORD - KGS

1 stop16h 50mSWISS

Tue 7/298:30 pmKGS - ORD

1 stop23h 40mSWISS

Deal found 6/25

$1,297

One-way flights from Illinois to Kos
Search for one-way flight options from Illinois to Kos. Find affordable one-way fares based on user searches. Data last updated June 26, 2025.

Sat 8/98:40 amORD - KGS

2 stops21h 50mMultiple Airlines

Deal found 6/25

$626

Sat 8/97:05 pmORD - KGS

1 stop31h 05mSWISS

Deal found 6/25

$633

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 8/14

2:20 pm-3:10 pm

1 stop16h 50m

Kos

Wed 8/20

8:40 pm-3:55 pm

1 stop27h 15m

$779

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/10

9:40 pm-7:25 pm

1 stop13h 45m

Kos

Mon 10/27

12:40 pm-10:50 pm

2 stops41h 10m

$805

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 8/14

9:40 pm-8:50 am

2 stops27h 10m

Kos

Wed 8/20

8:40 pm-12:10 pm

1 stop23h 30m

$819

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 8/10

4:20 pm-8:00 pm

1 stop19h 40m

Kos

Sun 8/17

10:00 am-1:20 pm

1 stop35h 20m

$1,245

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 8/9

8:40 am-2:30 pm

2 stops21h 50m

$626

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 8/9

7:05 pm-10:10 am

1 stop31h 05m

$633

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Best time to book a flight from Illinois to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Illinois with our price prediction graph.

Estimated round-trip 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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Kos

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Kos

Read through reviews of airlines operating flights from Illinois to Kos, such as Austrian Airlines, SWISS, and Lufthansa. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Austrian Airlines

7.6

Good

805 reviews

Reviews

1 / 20

10.0

Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

Austrian Airlines

7.6

Good

805 reviews

Austrian Airlines

7.6

Good

805 reviews

Reviews

1 / 20

10.0

Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

SWISS

7.5

Good

1,649 reviews

Austrian Airlines

7.6

Good

805 reviews

Reviews

1 / 20

10.0

Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

Lufthansa

6.8

Okay

7,188 reviews

Austrian Airlines

7.6

Good

805 reviews

Reviews

1 / 20

10.0

Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

Related info for your journey

What airport do you fly into for flights to Kos from Illinois?
Located just 12.8 mi from the city center, Kos (KGS) is the airport most travelers will use when flying to Kos from Illinois.
Can I find deals for flights from Illinois to Kos that include hotel bookings?
Yes. In addition to deals on Illinois to Kos flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Illinois to Kos?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Kos.
Can I find deals for business class flights from Illinois to Kos?
Yes. Cheapflights offers flight deals from Illinois 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

Browse thousands of different options on Cheapflights for your next trip

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$626+ Cheap flights from Illinois to Kos (KGS)

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Illinois to Kos with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Illinois to Kos

Keep the following information in mind while searching for Illinois to Kos flight deals. Data was last updated June 26, 2025.

Round-trip from

One-way from

Find flight deals from Illinois to Kos

Cheapest flights from Illinois to KosExplore the most affordable flight options available from Illinois to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

Explore the most affordable flight options available from Illinois to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Illinois to Kos that are best for you.

Best time to book a flight from Illinois to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Illinois with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Kos

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 June 26, 2025.

Read through reviews of airlines operating flights from Illinois to Kos, such as Austrian Airlines, SWISS, and Lufthansa. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 Illinois?

Can I find deals for flights from Illinois to Kos that include hotel bookings?

How can I find direct flights from Illinois to Kos?

Can I find deals for business class flights from Illinois to Kos?

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 Illinois to Kos

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Illinois to Kos
Explore the most affordable flight options available from Illinois to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2025.