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Kos

$645+ Cheap flights from Chicago (CHI) 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — KGS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Chicago to Kos

Cheapest flights from Chicago to Kos
Explore the most affordable flight options available from Chicago to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:05 pm
ORD
-
KGS
1 stop16h 35m
SWISS
Sun 9/133:15 pm
KGS
-
ORD
1 stop32h 40m
SWISS
Deal found 1/28$645
This Expedia deal was found by Cheapflights users on 1/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/242:15 pm
ORD
-
KGS
2 stops36h 10m
Multiple Airlines
Sun 9/133:15 pm
KGS
-
ORD
1 stop29h 20m
Multiple Airlines
Deal found 1/28$777
This KAYAK deal was found by Cheapflights users on 1/28. 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 8/249:30 pm
ORD
-
KGS
2 stops39h 20m
Austrian Airlines
Sun 9/1310:00 am
KGS
-
ORD
2 stops38h 37m
Austrian Airlines
Deal found 1/28$948
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/13:00 pm
ORD
-
KGS
1 stop17h 50m
Multiple Airlines
Mon 7/1311:40 pm
KGS
-
ORD
1 stop21h 30m
Multiple Airlines
Deal found 1/28$1,173
This Trip.com deal was found by Cheapflights users on 1/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/1510:50 pm
ORD
-
KGS
2 stops26h 15m
Multiple Airlines
Sat 3/218:35 pm
KGS
-
ORD
2 stops51h 45m
Multiple Airlines
Deal found 1/27$1,199
This SWISS deal was found by Cheapflights users on 1/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/292:20 pm
ORD
-
KGS
1 stop21h 20m
SWISS
Mon 7/1311:00 am
KGS
-
ORD
1 stop33h 35m
SWISS
Deal found 1/28$1,215
This SWISS deal was found by Cheapflights users on 1/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/232:20 pm
ORD
-
KGS
1 stop21h 35m
SWISS
Thu 7/211:00 am
KGS
-
ORD
1 stop33h 35m
SWISS
Deal found 1/28$1,219
This SWISS deal was found by Cheapflights users on 1/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:05 pm
ORD
-
KGS
1 stop31h 05m
SWISS
Mon 7/1311:00 am
KGS
-
ORD
1 stop33h 35m
SWISS
Deal found 1/28$1,233
This SWISS deal was found by Cheapflights users on 1/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:05 pm
ORD
-
KGS
1 stop16h 35m
SWISS
Thu 7/211:00 am
KGS
-
ORD
1 stop33h 35m
SWISS
Deal found 1/28$1,264
This Lufthansa deal was found by Cheapflights users on 1/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/214:20 pm
ORD
-
KGS
1 stop19h 40m
Multiple Airlines
Sat 7/48:35 pm
KGS
-
ORD
1 stop29h 40m
Multiple Airlines
Deal found 1/28$1,287

Find flight deals from Chicago to Kos

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Kos (KGS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 29, 2026.

Round-trip from

$1,173
(Kiwi.com)
From Chicago (CHI) to Kos
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Chicago 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 January 29, 2026.
Use the filters below to find and compare flights from Chicago to Kos that are best for you.

Fly from

Chicago

Fly to

Kos

Route

Depart

Return

Price

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 3/15

10:50 pm-8:05 am

2 stops26h 15m

Kos

Sat 3/21

8:35 pm-5:20 pm

2 stops51h 45m

$1,199

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 6/29

2:20 pm-7:40 pm

1 stop21h 20m

Kos

Mon 7/13

11:00 am-12:35 pm

1 stop33h 35m

$1,215

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Tue 6/30

7:05 pm-10:10 am

1 stop31h 05m

Kos

Mon 7/13

11:00 am-12:35 pm

1 stop33h 35m

$1,233

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Tue 6/23

2:20 pm-7:55 pm

1 stop21h 35m

Kos

Sat 7/4

8:45 pm-3:55 pm

1 stop27h 10m

$1,264

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 6/28

4:20 pm-8:00 pm

1 stop19h 40m

Kos

Mon 7/13

11:15 am-12:55 pm

1 stop33h 40m

$1,296

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 6/29

7:05 pm-7:40 pm

1 stop16h 35m

Kos

Thu 7/9

11:00 am-3:55 pm

1 stop36h 55m

$1,301

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Tue 6/30

7:05 pm-10:10 am

1 stop31h 05m

Kos

Wed 7/15

8:40 pm-3:55 pm

1 stop27h 15m

$1,301

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 6/29

2:20 pm-7:40 pm

1 stop21h 20m

Kos

Wed 7/15

8:40 pm-3:55 pm

1 stop27h 15m

$1,301

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 6/29

2:20 pm-7:40 pm

1 stop21h 20m

Kos

Sun 7/12

3:15 pm-12:35 pm

1 stop29h 20m

$1,307

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 6/29

2:20 pm-7:40 pm

1 stop21h 20m

Kos

Sat 7/11

8:45 pm-12:35 pm

1 stop23h 50m

$1,308

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 12 results
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Best time to book a flight from Chicago to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Chicago 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 Chicago 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 Chicago 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 Chicago?

    Most people fly into Kos (KGS) if they book a flight to Kos from Chicago. On average, Kos has 0 inbound flights from Chicago per day from 0 airlines. Kos is conveniently located just 12.8 mi from Kos’s city center.

  • How long is the flight from Chicago to Kos?

    SWISS can get you from Chicago to Kos in just under 21h 20m. Your travel time can differ by up to . There are 5622 mi between Chicago and Kos.

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

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

  • How can I find direct flights from Chicago to Kos?

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

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

    Yes. Cheapflights offers flight deals from Chicago 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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