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Kos

$754+ Cheap flights from Illinois to Kos (KGS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — KGS
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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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 September 16, 2025.

Round-trip from

$774
(Booking.com)
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 September 16, 2025.

This Ovago deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/163:35 pmORD - KGS
1 stop19h 30mMultiple Airlines
Tue 9/238:30 pmKGS - ORD
1 stop27h 25mMultiple Airlines
Deal found 9/14$754
This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/157:05 pmORD - KGS
1 stop16h 35mSWISS
Wed 9/248:40 pmKGS - ORD
1 stop27h 15mSWISS
Deal found 9/14$770
This Booking.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/104:20 pmORD - KGS
1 stop17h 35mAustrian Airlines
Wed 10/159:40 pmKGS - ORD
1 stop23h 40mAustrian Airlines
Deal found 9/14$774
This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:20 pmORD - KGS
1 stop20h 30mAustrian Airlines
Wed 9/249:40 pmKGS - ORD
2 stops28h 50mAustrian Airlines
Deal found 9/14$792
This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/104:20 pmORD - KGS
1 stop32h 50mMultiple Airlines
Mon 10/2712:40 pmKGS - ORD
1 stop13h 45mMultiple Airlines
Deal found 9/14$830
This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/164:00 pmORD - KGS
2 stops19h 05mLufthansa
Mon 9/2212:40 pmKGS - ORD
2 stops39h 15mLufthansa
Deal found 9/14$834
This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/184:20 pmORD - KGS
1 stop20h 25mAustrian Airlines
Wed 9/249:40 pmKGS - ORD
2 stops28h 50mAustrian Airlines
Deal found 9/14$842
This KAYAK deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1510:30 pmORD - KGS
1 stop30h 10mLufthansa
Mon 9/2212:40 pmKGS - ORD
2 stops39h 15mLufthansa
Deal found 9/14$903

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Kos that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Illinois to Kos that are best for you.

Fly from

Illinois

Fly to

Kos

Route

Depart

Return

Price

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/10

4:20 pm-5:55 pm

1 stop17h 35m

Kos

Wed 10/15

9:40 pm-1:20 pm

1 stop23h 40m

$774

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/10

4:20 pm-9:10 am

1 stop32h 50m

Kos

Mon 10/27

12:40 pm-7:25 pm

1 stop13h 45m

$830

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/10

7:25 pm-11:10 pm

3 stops19h 45m

Kos

Wed 10/15

8:35 am-9:15 pm

3 stops20h 40m

$927

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 9/29

8:35 pm-5:30 pm

2 stops60h 55m

$1,267

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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.

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?

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

  • How long is the flight from Illinois to Kos?

    There are many flights that can get you from Illinois to Kos in 17h 35m. Fly via Austrian Airlines to get the fastest option. The distance from Illinois to Kos is about 5622 mi.

  • 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

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