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Cheap flights from Chicago O'Hare Intl Airport to Kos from $749

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Kos departing on 12/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:50 pm - 8:05 amORD-KGS
26h 15m2 stops
Multiple Airlines Logo
8:35 pm - 1:10 pmKGS-ORD
24h 35m2 stops
$749Multiple Airlines
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Mon, Dec 1 - Mon, Dec 8
Multiple Airlines Logo
4:20 pm - 4:10 pmORD-KGS
15h 50m2 stops
Multiple Airlines Logo
8:35 pm - 1:10 pmKGS-ORD
24h 35m2 stops
$765Multiple Airlines
Find Deal
Sun, Nov 30 - Tue, Dec 9
Multiple Airlines Logo
6:50 pm - 8:05 pmORD-KGS
17h 15m2 stops
Multiple Airlines Logo
8:35 pm - 1:10 pmKGS-ORD
24h 35m2 stops
$766Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
4:20 pm - 4:10 pmORD-KGS
15h 50m2 stops
Multiple Airlines Logo
9:05 pm - 1:10 pmKGS-ORD
24h 05m2 stops
$815Multiple Airlines
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Sun, Nov 30 - Sun, Dec 7
Lufthansa Logo
7:10 pm - 7:25 pmORD-KGS
17h 15m2 stops
Lufthansa Logo
6:55 pm - 6:25 pmKGS-ORD
31h 30m1 stop
$843Lufthansa
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Fri, Oct 31 - Wed, Nov 5
Lufthansa Logo
7:10 pm - 7:25 pmORD-KGS
17h 15m2 stops
Lufthansa Logo
6:55 pm - 6:25 pmKGS-ORD
31h 30m1 stop
$854Lufthansa
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Fri, Oct 31 - Wed, Nov 5
SWISS Logo
4:25 pm - 7:55 pmORD-KGS
43h 30m2 stops
SWISS Logo
7:30 pm - 3:55 pmKGS-ORD
28h 25m2 stops
$1,272SWISS
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Thu, Apr 2 - Mon, Apr 6
SWISS Logo
6:00 pm - 7:55 pmORD-KGS
41h 55m2 stops
SWISS Logo
7:30 pm - 2:10 pmKGS-ORD
50h 40m3 stops
$1,498SWISS
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Thu, Apr 2 - Mon, Apr 6
Emirates Logo
7:45 pm - 5:05 pmORD-KGS
37h 20m2 stops
Emirates Logo
12:35 pm - 2:55 pmKGS-ORD
34h 20m2 stops
$1,814Emirates
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Wed, Dec 3 - Tue, Dec 9
Emirates Logo
7:45 pm - 5:05 pmORD-KGS
37h 20m2 stops
Emirates Logo
12:35 pm - 2:55 pmKGS-ORD
34h 20m2 stops
$1,857Emirates
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Wed, Dec 3 - Mon, Dec 8

SWISS flights from Chicago O'Hare Intl Airport to Kos

Our best SWISS deals on Chicago O'Hare Intl Airport to Kos flight tickets
SWISS
Apr 2
ORD4:25 pmChicago O'Hare Intl
43h 30m
2 stops
KGS7:55 pmKos
Apr 6
KGS7:30 pmKos
28h 25m
2 stops
ORD3:55 pmChicago O'Hare Intl
$1,272
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SWISS
Apr 2
ORD6:00 pmChicago O'Hare Intl
41h 55m
2 stops
KGS7:55 pmKos
Apr 6
KGS7:30 pmKos
50h 40m
3 stops
ORD2:10 pmChicago O'Hare Intl
$1,498
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Lufthansa flights from Chicago O'Hare Intl Airport to Kos

Our best Lufthansa deals on Chicago O'Hare Intl Airport to Kos flight tickets
Lufthansa
Oct 31
ORD7:10 pmChicago O'Hare Intl
17h 15m
2 stops
KGS7:25 pmKos
Nov 5
KGS6:55 pmKos
31h 30m
1 stop
ORD6:25 pmChicago O'Hare Intl
$843
Find similar
Lufthansa
Oct 31
ORD7:10 pmChicago O'Hare Intl
17h 15m
2 stops
KGS7:25 pmKos
Nov 5
KGS6:55 pmKos
31h 30m
1 stop
ORD6:25 pmChicago O'Hare Intl
$854
Find similar
Lufthansa
Oct 31
ORD7:10 pmChicago O'Hare Intl
17h 15m
2 stops
KGS7:25 pmKos
Nov 5
KGS6:55 pmKos
26h 15m
2 stops
ORD1:10 pmChicago O'Hare Intl
$911
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momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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, momondo users made 832,500 searches. Data last updated October 22, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Mon 12/1

9:50 pm-8:05 am

2 stops26h 15m

Kos

Mon 12/8

8:35 pm-1:10 pm

2 stops24h 35m

$749

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 11/30

4:20 pm-4:10 pm

2 stops15h 50m

Kos

Tue 12/9

8:35 pm-1:10 pm

2 stops24h 35m

$765

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Tue 12/2

6:50 pm-8:05 pm

2 stops17h 15m

Kos

Tue 12/9

8:35 pm-1:10 pm

2 stops24h 35m

$766

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 11/30

4:20 pm-4:10 pm

2 stops15h 50m

Kos

Sun 12/7

9:05 pm-1:10 pm

2 stops24h 05m

$815

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/31

7:10 pm-7:25 pm

2 stops17h 15m

Kos

Wed 11/5

6:55 pm-6:25 pm

1 stop31h 30m

$843

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/31

7:10 pm-7:25 pm

2 stops17h 15m

Kos

Wed 11/5

6:55 pm-6:25 pm

1 stop31h 30m

$854

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 4/2

4:25 pm-7:55 pm

2 stops43h 30m

Kos

Mon 4/6

7:30 pm-3:55 pm

2 stops28h 25m

$1,272

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 4/2

6:00 pm-7:55 pm

2 stops41h 55m

Kos

Mon 4/6

7:30 pm-2:10 pm

3 stops50h 40m

$1,498

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Wed 12/3

7:45 pm-5:05 pm

2 stops37h 20m

Kos

Tue 12/9

12:35 pm-2:55 pm

2 stops34h 20m

$1,814

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Wed 12/3

7:45 pm-5:05 pm

2 stops37h 20m

Kos

Mon 12/8

12:35 pm-2:55 pm

2 stops34h 20m

$1,857

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Kos from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Kos

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Kos?

The cheapest day to depart from Chicago O'Hare Intl Airport to Kos is on a Wednesday when prices can be found for as low as $982. On the other hand, Sunday is the most expensive day to depart from Chicago O'Hare Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,086.

What is the cheapest time of day to depart on your flight to Kos?

Flying to Kos from Chicago O'Hare Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $710 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,086 on average. Flights to Kos from Chicago O'Hare Intl Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Chicago O'Hare Intl Airport to Kos

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Kos according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Kos (ORD to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Kos

Direct flights

None
There are no direct flights from Chicago O'Hare Intl Airport to Kos. There are no popular flight routes from Chicago O'Hare Intl Airport to Kos.
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  • How far is Chicago O'Hare Intl to Kos by plane?

    A flight from Chicago O'Hare Intl to Kos will travel around 5624.6 mi. 15h 50m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Kos Airport?

    Prices for flights from Chicago O'Hare Intl Airport to Kos Airport refresh daily.

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Kos Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Kos Airport.

  • What documentation or ID do you need to fly to Kos Airport?

    The required travel and health documents for your Kos Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Kos Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Kos?

Book flights to Kos if you plan to visit one of these locations
Kardamena
Marmari

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Kos?

It is quick and easy to find Chicago to Kos flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Kos that suits you.

Can I find flights from Chicago to Kos with flexible booking policies on momondo?

Flights from Chicago to Kos with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Chicago to Kos?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Kos from Chicago.

I’m not ready to book a flight from Chicago to Kos right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Kos from Chicago. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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