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$990+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — KGS
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap 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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$990
(Mytrip)
Provider with most accurate pricing for Chicago (CHI)-Kos flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Kos flights.
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From Chicago (CHI) to Kos
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Find 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 May 1, 2025.

This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/137:04 amORD - KGS
3 stops30h 26mMultiple Airlines
Fri 6/2011:40 amKGS - ORD
3 stops26h 57mMultiple Airlines
Deal found 4/30$990
This Lufthansa deal was found by Cheapflights users on 5/1. 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.
Fri 10/109:40 pmORD - KGS
1 stop13h 45mLufthansa
Mon 10/2712:40 pmKGS - ORD
2 stops39h 25mLufthansa
Deal found 5/1$1,027
This SWISS deal was found by Cheapflights users on 4/30. 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.
Sat 6/147:05 pmORD - KGS
1 stop31h 05mSWISS
Sat 6/218:45 pmKGS - ORD
1 stop23h 25mSWISS
Deal found 4/30$1,628
This Austrian Airlines deal was found by Cheapflights users on 4/30. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/149:25 pmORD - KGS
2 stops38h 35mAustrian Airlines
Sat 6/216:45 pmKGS - ORD
2 stops30h 35mAustrian Airlines
Deal found 4/30$1,874

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 May 1, 2025.
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

Fri 6/13

7:04 am-9:30 pm

3 stops30h 26m

Kos

Fri 6/20

11:40 am-6:37 am

3 stops26h 57m

$990

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Fri 10/10

9:40 pm-7:25 pm

1 stop13h 45m

Kos

Mon 10/27

12:40 pm-9:05 pm

2 stops39h 25m

$1,027

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 6/14

7:05 pm-10:10 am

1 stop31h 05m

Kos

Sat 6/21

8:45 pm-3:55 pm

1 stop27h 10m

$1,628

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 6/14

9:25 pm-8:00 pm

2 stops38h 35m

Kos

Sat 6/21

6:45 pm-5:20 pm

2 stops30h 35m

$1,874

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 6/14

5:58 pm-8:00 pm

2 stops42h 02m

$1,027

ChicagoKos

ORD - KGS

ORDKGS

Chicago O'Hare Intl

Sat 6/14

7:05 pm-5:05 pm

1 stop14h 00m

$1,088

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

  • Most accurate provider: When it comes to deals on Chicago-Kos flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Chicago-Kos flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Chicago-Kos flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Chicago-Kos flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-Kos flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

What is the cheapest time of day to fly from CHI to KGS?

Find hourly flight availability from Chicago to Kos. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

It’s optimal to fly from Chicago to Kos at noon. By choosing this option you can save up to 35% on the cost of your flight, compared to a flight in the morning.

Rainfall in Kos by month

Plan your trip to Kos by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Kos ranges from 0.1 - 6.7 inches per month. January is typically the wettest month, when rainfall can reach 6.7 in. July is typically the driest time to visit Kos when rainfall is around 0.1 in.

Temperature in Kos by month

Plan your trip to Kos by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Kos, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 50.0 F).

Reviews of airlines servicing Kos

Get insights into the airlines that provide service to Kos. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kos. Reviews last updated May 1, 2025.
Austrian Airlines
7.6
Good
781 reviews

Food

6.7

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.7

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
Austrian Airlines
7.6
Good
781 reviews
Austrian Airlines
7.6
Good
781 reviews

Food

6.7

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.7

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.
SWISS
7.5
Good
1,589 reviews
Austrian Airlines
7.6
Good
781 reviews

Food

6.7

Overall

7.6

Boarding

7.6

Crew

8.1

Entertainment

6.7

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Ely,Mar 2025

VIE - PMI

Luggage at destination was not split into priorities. Had business and only got my bag after 20 minutes, almost towards the end and I was in a rush, so the "priority" was completely ignored.

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 1 airline. Kos is conveniently located just 12.8 mi from Kos’s city center.

  • 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Chicago to Kos

Discover the top airline that operate flights from Chicago to Kos. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$613Average$877FlexibilityNo cancel feeOn-time79%

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