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Cheap flights from Illinois to Kos from $1,206

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Kos departing on 4/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Illinois to Kos

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
8:15 pm - 7:55 pmORD-KGS
39h 40m2 stops
SWISS Logo
7:30 pm - 3:55 pmKGS-ORD
28h 25m2 stops
$1,206SWISS
Find Deal
Thu, Apr 2 - Mon, Apr 6
SWISS Logo
8:15 pm - 7:55 pmORD-KGS
39h 40m2 stops
SWISS Logo
7:30 pm - 3:55 pmKGS-ORD
28h 25m2 stops
$1,384SWISS
Find Deal
Thu, Apr 2 - Mon, Apr 6
SWISS Logo
8:15 pm - 7:55 pmORD-KGS
39h 40m2 stops
SWISS Logo
7:30 pm - 12:00 pmKGS-ORD
24h 30m3 stops
$1,430SWISS
Find Deal
Thu, Apr 2 - Mon, Apr 6
SWISS Logo
8:15 pm - 7:55 pmORD-KGS
39h 40m2 stops
SWISS Logo
7:30 pm - 12:00 pmKGS-ORD
24h 30m3 stops
$1,431SWISS
Find Deal
Thu, Apr 2 - Mon, Apr 6
SWISS Logo
8:15 pm - 7:55 pmORD-KGS
39h 40m2 stops
SWISS Logo
7:30 pm - 3:55 pmKGS-ORD
28h 25m2 stops
$1,511SWISS
Find Deal
Thu, Apr 2 - Mon, Apr 6
Multiple Airlines Logo
4:50 pm - 8:05 pmORD-KGS
19h 15m3 stops
Multiple Airlines Logo
9:45 pm - 5:05 pmKGS-ORD
27h 20m2 stops
$1,978Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
Multiple Airlines Logo
4:50 pm - 8:05 pmORD-KGS
19h 15m3 stops
Multiple Airlines Logo
9:05 pm - 5:05 pmKGS-ORD
28h 00m3 stops
$2,062Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26
Multiple Airlines Logo
4:25 pm - 8:05 pmORD-KGS
19h 40m2 stops
Multiple Airlines Logo
9:45 pm - 5:05 pmKGS-ORD
27h 20m2 stops
$2,124Multiple Airlines
Find Deal
Fri, Dec 19 - Fri, Dec 26

SWISS flights from Illinois to Kos

Our best SWISS deals on Illinois to Kos flight tickets
SWISS
Apr 2
ORD8:15 pmChicago O'Hare Intl
39h 40m
2 stops
KGS7:55 pmKos
Apr 6
KGS7:30 pmKos
28h 25m
2 stops
ORD3:55 pmChicago O'Hare Intl
$1,206
Find similar
SWISS
Apr 2
ORD8:15 pmChicago O'Hare Intl
39h 40m
2 stops
KGS7:55 pmKos
Apr 6
KGS7:30 pmKos
28h 25m
2 stops
ORD3:55 pmChicago O'Hare Intl
$1,384
Find similar
SWISS
Apr 2
ORD8:15 pmChicago O'Hare Intl
39h 40m
2 stops
KGS7:55 pmKos
Apr 6
KGS7:30 pmKos
24h 30m
3 stops
ORD12:00 pmChicago O'Hare Intl
$1,430
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 6, 2025.
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 4/2

8:15 pm-7:55 pm

2 stops39h 40m

Kos

Mon 4/6

7:30 pm-3:55 pm

2 stops28h 25m

$1,206

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 4/2

8:15 pm-7:55 pm

2 stops39h 40m

Kos

Mon 4/6

7:30 pm-3:55 pm

2 stops28h 25m

$1,384

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 4/2

8:15 pm-7:55 pm

2 stops39h 40m

Kos

Mon 4/6

7:30 pm-12:00 pm

3 stops24h 30m

$1,430

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 4/2

8:15 pm-7:55 pm

2 stops39h 40m

Kos

Mon 4/6

7:30 pm-12:00 pm

3 stops24h 30m

$1,431

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Thu 4/2

8:15 pm-7:55 pm

2 stops39h 40m

Kos

Mon 4/6

7:30 pm-3:55 pm

2 stops28h 25m

$1,511

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 12/19

4:50 pm-8:05 pm

3 stops19h 15m

Kos

Fri 12/26

9:45 pm-5:05 pm

2 stops27h 20m

$1,978

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 12/19

4:50 pm-8:05 pm

3 stops19h 15m

Kos

Fri 12/26

9:05 pm-5:05 pm

3 stops28h 00m

$2,062

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 12/19

4:25 pm-8:05 pm

2 stops19h 40m

Kos

Fri 12/26

9:45 pm-5:05 pm

2 stops27h 20m

$2,124

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 Illinois 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 Illinois 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 Illinois 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 Illinois 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 Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Cheap Illinois to Kos flight deals and tips

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

Direct flights

None
There are no direct flights from Illinois to Kos. There are no popular flight routes from Illinois to Kos.
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  • When did momondo last update prices for flights from Illinois to Kos Airport?

    Prices for flights from Illinois to Kos Airport were last updated today.

  • How old do you have to be to fly from Illinois 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 Illinois 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.

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 Illinois to Kos?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Kos. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Kos from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Kos from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Kos from Illinois. 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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