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$393+ Cheap flights from South Korea to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
fev 27 — mar 61
sex 2/27
sex 3/6
1 adult, Economy
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Cheap flight deals from South Korea to Illinois

Cheapest flights from South Korea to Illinois
Explore the most affordable flight options available from South Korea to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janeiro 28, 2026.

This Booking.com deal was found by Cheapflights users on 1/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 6/25:45 pm
ICN
-
ORD
2 stops40h 16m
Air Canada
ter 6/303:40 pm
ORD
-
ICN
1 stop34h 25m
Air Canada
Deal found 1/26$665
This Hanatour deal was found by Cheapflights users on 1/25. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 3/175:55 pm
ICN
-
ORD
1 stop34h 46m
Air Canada
dom 3/293:40 pm
ORD
-
ICN
1 stop34h 25m
Air Canada
Deal found 1/25$672
This Hanatour 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 4/295:45 pm
ICN
-
ORD
1 stop16h 13m
Air Canada
ter 5/53:40 pm
ORD
-
ICN
1 stop34h 25m
Air Canada
Deal found 1/27$673
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/145:45 pm
ICN
-
STL
2 stops40h 20m
Air Canada
sáb 6/201:15 pm
STL
-
ICN
2 stops60h 50m
Air Canada
Deal found 1/27$675
This Gotogate deal was found by Cheapflights users on 1/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 4/295:45 pm
ICN
-
ORD
1 stop34h 58m
Air Canada
seg 5/43:40 pm
ORD
-
ICN
1 stop34h 25m
Air Canada
Deal found 1/26$677
This Hanatour 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 4/145:45 pm
ICN
-
ORD
1 stop34h 58m
Air Canada
ter 4/213:40 pm
ORD
-
ICN
1 stop34h 25m
Air Canada
Deal found 1/28$681
This WhyPayMore 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 5/75:45 pm
ICN
-
ORD
1 stop35h 00m
Air Canada
qua 5/203:40 pm
ORD
-
ICN
1 stop34h 25m
Air Canada
Deal found 1/28$687
This Air Canada deal was found by Cheapflights users on 1/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 2/176:55 pm
ICN
-
ORD
1 stop34h 46m
Air Canada
seg 2/233:35 pm
ORD
-
ICN
1 stop33h 25m
Air Canada
Deal found 1/26$688
This Air Canada deal was found by Cheapflights users on 1/26. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 2/176:55 pm
ICN
-
ORD
1 stop34h 46m
Air Canada
qui 2/266:28 pm
ORD
-
ICN
2 stops31h 42m
Air Canada
Deal found 1/26$697
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.
sex 10/95:45 pm
ICN
-
ORD
1 stop35h 04m
Air Canada
dom 10/118:00 pm
ORD
-
ICN
2 stops30h 05m
Air Canada
Deal found 1/28$699
This Asiana Airlines deal was found by Cheapflights users on 1/25. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 4/139:00 pm
ICN
-
STL
1 stop31h 51m
Multiple Airlines
seg 4/204:20 pm
STL
-
ICN
1 stop22h 55m
Multiple Airlines
Deal found 1/25$703
This FlightHub deal was found by Cheapflights users on 1/26. 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.
seg 4/135:45 pm
ICN
-
STL
2 stops35h 39m
Air Canada
dom 4/194:05 pm
STL
-
ICN
2 stops34h 00m
Air Canada
Deal found 1/26$705

Find flight deals from South Korea to Illinois

Keep the following information in mind while searching for South Korea to Illinois flight deals. Data was last updated janeiro 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$665
(Booking.com)

One-way from

$393
(Mytrip)

Popular in

January

Cheapest in

November

Average price

$1,647

Good round-trip deal

$1,389 or less

Good one-way deal

$1,146 or less
Provider with most accurate pricing for Seoul (SEL)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seoul (SEL)-Chicago (CHI) flights.
Search Deals
From South Korea to Illinois
Search Deals
One-way flight from South Korea to Illinois
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from South Korea to Illinois.
Search Deals
Price to beat on a one-way flight from South Korea to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from South Korea to Illinois 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 janeiro 28, 2026.
Use the filters below to find and compare flights from South Korea to Illinois that are best for you.

Fly from

South Korea

Fly to

Illinois

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

qui 5/14

5:45 pm-8:05 pm

2 stops40h 20m

Lambert-St Louis

sáb 6/20

1:15 pm-4:05 pm

2 stops60h 50m

$675

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

seg 4/13

9:00 pm-11:59 pm

1 stop16h 59m

Lambert-St Louis

dom 4/19

7:00 am-5:15 am

1 stop32h 15m

$703

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

seg 4/13

9:00 pm-2:51 pm

1 stop31h 51m

Lambert-St Louis

seg 4/20

4:20 pm-5:15 am

1 stop22h 55m

$703

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

ter 4/14

5:45 pm-3:24 pm

2 stops35h 39m

Lambert-St Louis

ter 4/21

4:05 pm-4:05 pm

2 stops34h 00m

$705

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

ter 4/14

9:00 pm-2:51 pm

1 stop31h 51m

Lambert-St Louis

ter 4/21

7:00 am-5:15 am

1 stop32h 15m

$712

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

seg 4/13

5:45 pm-3:24 pm

2 stops35h 39m

Lambert-St Louis

dom 4/19

4:05 pm-5:30 pm

1 stop35h 25m

$719

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

qui 3/12

5:55 pm-3:29 pm

2 stops35h 34m

Lambert-St Louis

qui 3/19

4:05 pm-4:15 pm

2 stops34h 10m

$746

BusanChicago

PUS - ORD

PUSORD

Busan Gimhae

qui 5/28

7:15 am-1:25 pm

2 stops44h 10m

Chicago O'Hare Intl

qua 6/3

3:40 pm-7:20 am

2 stops49h 40m

$802

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

sex 2/27

8:35 pm-4:33 pm

1 stop34h 58m

Chicago O'Hare Intl

sex 3/6

3:54 pm-6:35 pm

1 stop35h 41m

$811

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

sáb 2/7

8:35 pm-11:50 pm

1 stop18h 15m

Chicago O'Hare Intl

dom 2/15

7:00 am-6:35 pm

1 stop20h 35m

$824

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 60 results
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Best time to book a flight from South Korea to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from South Korea 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 South Korea to Illinois

What is the cheapest month to book a flight from South Korea to Illinois?

Currently, August is the cheapest month in which you can book a flight from South Korea to Illinois (average of $208). Flying from South Korea to Illinois in January is currently the most expensive (average of $1,041). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from KR to IL?

Find hourly flight availability from South Korea to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated janeiro 28, 2026.

One of the essential ways to save on airfare from South Korea to Illinois is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 55% on airfare.

What is the cheapest day to fly from South Korea to Illinois?

Use this chart to determine the cheapest time to fly round-trip from South Korea to Illinois. Price data was last updated on January 24, 2026.

Travelers seeking maximum savings on their South Korea to Illinois flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from South Korea to Illinois

Explore weekly flight availability from South Korea to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated janeiro 28, 2026.

The most flights from KR0 to USIL are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated janeiro 28, 2026.
Get a feel of what it's like to fly with Korean Air, Alaska Airlines, and Delta from South Korea to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,188 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,188 reviews
Korean Air
8.4
Very good
1,188 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Alaska Airlines
8.0
Very good
11,799 reviews
Korean Air
8.4
Very good
1,188 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Delta
7.9
Good
8,120 reviews
Korean Air
8.4
Very good
1,188 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
United Airlines
7.4
Good
9,206 reviews
Korean Air
8.4
Very good
1,188 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Air Canada
7.1
Good
10,663 reviews
Korean Air
8.4
Very good
1,188 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Crew

8.7

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from South Korea to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from South Korea to Illinois?

    There are many flights that can get you from South Korea to Illinois in 16h 55m. Fly via Air Canada, Hawaiian Airlines, or United Airlines to get the fastest option. South Korea and Illinois are separated by a distance of 6533 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from South Korea to Illinois one-way?

    $476 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Air Canada and Korean Air, with prices starting from $563 and $608, respectively.

  • Can I find deals for flights from South Korea to Illinois that include hotel bookings?

    Yes. In addition to deals on South Korea to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Korea to Illinois?

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

  • Can I find deals for business class flights from South Korea to Illinois?

    Yes. Cheapflights offers flight deals from South Korea to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from South Korea to Illinois?

    Currently, August is the cheapest month in which you can book a flight from South Korea to Illinois (average of $208). Flying from South Korea to Illinois in January is currently the most expensive (average of $1,041). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for South Korea to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from South Korea to Illinois

Discover the top 6 airlines that operate flights from South Korea to Illinois. 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 janeiro 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$197Average$590FlexibilityNo cancel feeOn-time75%
DeltaCheapest$229Average$1,356FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$558Average$1,137FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$586Average$663FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$687Average$1,376FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$730Average$1,062FlexibilityNo cancel feeOn-time67%

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