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Cheap flights from Chicago to Kos from $967

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 to Kos departing on 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Chicago to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:10 pm - 12:35 am
ORD
-
KGS
20h 25m
2 stops
Multiple Airlines Logo
9:20 am - 9:40 am
KGS
-
ORD
32h 20m
2 stops
$967Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
4:20 pm - 8:00 pm
ORD
-
KGS
19h 40m
1 stop
Multiple Airlines Logo
8:35 pm - 12:00 pm
KGS
-
ORD
23h 25m
1 stop
$1,080Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
Austrian Airlines Logo
4:20 pm - 8:00 pm
ORD
-
KGS
19h 40m
1 stop
Austrian Airlines Logo
9:25 pm - 5:00 pm
KGS
-
ORD
27h 35m
2 stops
$1,121Austrian Airlines
Sun, Sep 6 - Sat, Sep 12
Multiple Airlines Logo
8:45 am - 6:15 pm
ORD
-
KGS
25h 30m
3 stops
Multiple Airlines Logo
10:40 am - 5:50 pm
KGS
-
ORD
15h 10m
1 stop
$1,143Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
Multiple Airlines Logo
8:10 pm - 11:20 am
ORD
-
KGS
31h 10m
3 stops
Multiple Airlines Logo
10:25 pm - 9:40 am
KGS
-
ORD
19h 15m
2 stops
$1,211Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
9:00 pm - 8:15 pm
ORD
-
KGS
15h 15m
1 stop
Multiple Airlines Logo
11:55 pm - 2:25 pm
KGS
-
ORD
22h 30m
2 stops
$1,262Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
3:45 pm - 6:55 pm
ORD
-
KGS
19h 10m
2 stops
Multiple Airlines Logo
10:25 pm - 8:16 pm
KGS
-
ORD
29h 51m
3 stops
$1,279Multiple Airlines
Tue, Jun 23 - Sat, Jul 4
Multiple Airlines Logo
8:45 am - 6:55 pm
ORD
-
KGS
26h 10m
3 stops
Multiple Airlines Logo
8:35 am - 9:40 am
KGS
-
ORD
33h 05m
3 stops
$1,317Multiple Airlines
Tue, Jun 23 - Sat, Jul 4
Multiple Airlines Logo
3:45 pm - 8:15 pm
ORD
-
KGS
20h 30m
1 stop
Multiple Airlines Logo
10:40 am - 5:50 pm
KGS
-
ORD
15h 10m
1 stop
$1,336Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
12:53 pm - 8:15 pm
ORD
-
KGS
23h 22m
3 stops
Multiple Airlines Logo
6:00 am - 9:15 pm
KGS
-
ORD
23h 15m
3 stops
$1,366Multiple Airlines
Sat, May 2 - Sat, May 9

Lufthansa flights from Chicago to Kos

Our best Lufthansa deals on Chicago to Kos flight tickets
Lufthansa
May 23
ORD9:40 pmChicago O'Hare Intl
27h 15m
2 stops
KGS8:55 amKos
Jun 1
KGS12:40 pmKos
31h 55m
1 stop
ORD12:35 pmChicago O'Hare Intl
$1,462
Lufthansa
May 23
ORD9:40 pmChicago O'Hare Intl
27h 15m
2 stops
KGS8:55 amKos
Jun 1
KGS12:40 pmKos
31h 55m
1 stop
ORD12:35 pmChicago O'Hare Intl
$1,463
Lufthansa
May 23
ORD9:40 pmChicago O'Hare Intl
27h 15m
2 stops
KGS8:55 amKos
Jun 1
KGS9:45 amKos
34h 50m
2 stops
ORD12:35 pmChicago O'Hare Intl
$1,494

Austrian Airlines flights from Chicago to Kos

Our best Austrian Airlines deals on Chicago to Kos flight tickets
Austrian Airlines
Sep 6
ORD4:20 pmChicago O'Hare Intl
19h 40m
1 stop
KGS8:00 pmKos
Sep 12
KGS9:25 pmKos
27h 35m
2 stops
ORD5:00 pmChicago O'Hare Intl
$1,121
Austrian Airlines
Jun 23
ORD11:03 amChicago O'Hare Intl
25h 47m
2 stops
KGS8:50 pmKos
Jul 5
KGS10:00 amKos
35h 20m
1 stop
ORD1:20 pmChicago O'Hare Intl
$1,658
Austrian Airlines
Jun 23
ORD11:03 amChicago O'Hare Intl
25h 47m
2 stops
KGS8:50 pmKos
Jul 7
KGS10:05 amKos
40h 45m
2 stops
ORD6:50 pmChicago O'Hare Intl
$1,661

momondo 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, momondo users made 832,500 searches. Data last updated March 21, 2026.
Use the filters below to find and compare flights from Chicago to Kos that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 5/2

8:10 pm-12:35 am

2 stops20h 25m

Kos

Sat 5/9

9:20 am-9:40 am

2 stops32h 20m

$967

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 9/6

4:20 pm-8:00 pm

1 stop19h 40m

Kos

Sat 9/12

8:35 pm-12:00 pm

1 stop23h 25m

$1,080

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 9/6

4:20 pm-8:00 pm

1 stop19h 40m

Kos

Sat 9/12

9:25 pm-5:00 pm

2 stops27h 35m

$1,121

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sun 9/6

8:45 am-6:15 pm

3 stops25h 30m

Kos

Sat 9/12

10:40 am-5:50 pm

1 stop15h 10m

$1,143

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 5/2

8:10 pm-11:20 am

3 stops31h 10m

Kos

Sat 5/9

10:25 pm-9:40 am

2 stops19h 15m

$1,211

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 5/2

9:00 pm-8:15 pm

1 stop15h 15m

Kos

Sat 5/9

11:55 pm-2:25 pm

2 stops22h 30m

$1,262

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Tue 6/23

3:45 pm-6:55 pm

2 stops19h 10m

Kos

Sat 7/4

10:25 pm-8:16 pm

3 stops29h 51m

$1,279

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Tue 6/23

8:45 am-6:55 pm

3 stops26h 10m

Kos

Sat 7/4

8:35 am-9:40 am

3 stops33h 05m

$1,317
Quickest round-trip

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 5/2

3:45 pm-8:15 pm

1 stop20h 30m

Kos

Sat 5/9

10:40 am-5:50 pm

1 stop15h 10m

$1,336

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 5/2

12:53 pm-8:15 pm

3 stops23h 22m

Kos

Sat 5/9

6:00 am-9:15 pm

3 stops23h 15m

$1,366

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Chicago to Kos

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

Cheap Chicago to Kos (CHI to KGS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Kos

Fastest flight time

12h 10m

Direct flights

None
The fastest flight from Chicago to Kos takes 12h 10m
There are no direct flights from Chicago to Kos. There are no popular flight routes from Chicago to Kos.
Search flight deals

  • How far is Chicago to Kos by plane?

    The distance between Chicago and Kos is about 5619.0 mi. A reasonable flight in good conditions will take 12h 10m.

  • When did momondo last update prices for flights from Chicago to Kos Airport?

    Prices for flights from Chicago to Kos Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Chicago to Kos Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago to Kos Airport.

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

    The travel and health documents you'll need for your trip to Kos Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Kos Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Chicago to Kos?

    Search flight deals from Chicago to Kos. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Chicago to Kos with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kos from Chicago.

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 for Chicago to Kos flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Chicago to Kos now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Kos and let you know when they change.

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