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$321+ 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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Cheap 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 octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$561
(American Airlines)

One-way from

$321
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$894

Good round-trip deal

$1,216 or less

Good one-way deal

$3,248 or less
Provider with most accurate pricing for Seoul (SEL)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Chicago (CHI) flights.
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From South Korea to Illinois
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One-way flight from South Korea to Illinois
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Highest demand for flights based on searches. 2% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from South Korea to Illinois.
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Price to beat on a one-way flight from South Korea to Illinois.
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Find 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 octubre 30, 2025.

This SmartFares deal was found by Cheapflights users on 10/30. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/78:35 pmICN - ORD
1 stop18h 49mAlaska Airlines
jue. 11/278:00 amORD - ICN
1 stop19h 35mAlaska Airlines
Deal found 10/30$558
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/257:15 pmICN - ORD
2 stops30h 49mAmerican Airlines
mié. 12/315:15 amORD - ICN
1 stop20h 30mAmerican Airlines
Deal found 10/28$561
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/77:15 pmICN - ORD
1 stop19h 22mAmerican Airlines
mar. 11/185:18 amORD - ICN
1 stop20h 27mAmerican Airlines
Deal found 10/28$568
This American Airlines deal was found by Cheapflights users on 10/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/107:15 pmICN - ORD
1 stop19h 20mAmerican Airlines
mar. 12/308:58 pmORD - ICN
1 stop28h 47mAmerican Airlines
Deal found 10/27$569
This American Airlines deal was found by Cheapflights users on 10/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/77:15 pmICN - ORD
1 stop19h 22mAmerican Airlines
lun. 11/249:10 pmORD - ICN
1 stop28h 35mAmerican Airlines
Deal found 10/29$570
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/88:35 pmICN - ORD
1 stop18h 49mAlaska Airlines
dom. 11/166:00 amORD - ICN
1 stop21h 35mAlaska Airlines
Deal found 10/28$577
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/412:45 pmICN - ORD
2 stops21h 08mUnited Airlines
mié. 11/262:40 pmORD - ICN
2 stops24h 00mUnited Airlines
Deal found 10/29$589
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/236:00 pmICN - ORD
1 stop20h 14mUnited Airlines
dom. 2/87:58 pmORD - ICN
1 stop29h 17mUnited Airlines
Deal found 10/28$590
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:00 pmICN - ORD
1 stop17h 05mUnited Airlines
vie. 1/26:15 amORD - ICN
1 stop19h 00mUnited Airlines
Deal found 10/30$591
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/177:15 pmICN - STL
2 stops29h 05mAmerican Airlines
dom. 11/306:13 pmSTL - ICN
1 stop31h 32mAmerican Airlines
Deal found 10/28$618
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/297:30 pmICN - STL
1 stop17h 36mDelta
mar. 12/28:05 pmSTL - ICN
2 stops29h 25mDelta
Deal found 10/28$620
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/295:55 pmICN - STL
1 stop16h 58mAmerican Airlines
mar. 12/25:17 amSTL - ICN
1 stop20h 28mAmerican Airlines
Deal found 10/28$624

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 octubre 30, 2025.
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

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

vie. 2/6

6:00 pm-10:12 am

2 stops31h 12m

Moline Quad-City

mar. 2/10

8:46 am-5:40 am

2 stops29h 54m

$589

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

lun. 12/22

12:45 pm-11:14 pm

1 stop25h 29m

Chicago O'Hare Intl

dom. 12/28

7:45 pm-4:15 pm

1 stop29h 30m

$589

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

lun. 2/2

6:00 pm-5:44 am

1 stop26h 44m

Chicago O'Hare Intl

vie. 2/13

6:25 am-4:15 pm

1 stop18h 50m

$589

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

vie. 12/26

6:00 pm-1:09 am

1 stop22h 09m

Chicago O'Hare Intl

vie. 2/13

4:10 pm-5:40 am

1 stop22h 30m

$590

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

lun. 11/24

6:00 pm-12:59 am

1 stop21h 59m

Chicago O'Hare Intl

mié. 1/14

4:16 pm-5:40 am

1 stop22h 24m

$590

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mar. 12/23

12:45 pm-11:25 am

1 stop37h 40m

Chicago O'Hare Intl

vie. 2/6

2:40 pm-5:40 am

1 stop24h 00m

$592

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mié. 12/10

12:45 pm-7:44 pm

1 stop21h 59m

Chicago O'Hare Intl

lun. 12/29

6:25 pm-4:15 pm

1 stop30h 50m

$592

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

jue. 12/25

6:00 pm-1:09 am

1 stop22h 09m

Chicago O'Hare Intl

mié. 2/11

9:00 am-5:40 am

1 stop29h 40m

$596

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mar. 12/23

6:00 pm-1:09 am

1 stop22h 09m

Chicago O'Hare Intl

jue. 2/12

12:46 pm-5:40 am

1 stop25h 54m

$598

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

jue. 12/25

6:00 pm-1:09 am

1 stop22h 09m

Chicago O'Hare Intl

jue. 2/12

4:45 pm-5:40 am

1 stop21h 55m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

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 $201). Flying from South Korea to Illinois in July is currently the most expensive (average of $980). 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 octubre 30, 2025.

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 at noon could potentially save you up to 27% 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 December 16, 2024.

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.

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 octubre 30, 2025.
Get a feel of what it's like to fly with Korean Air, Japan Airlines, and Asiana Airlines 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
1,155 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Overall

8.4

Boarding

8.5

Entertainment

8.2

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
1,155 reviews
Korean Air
8.4
Very good
1,155 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Overall

8.4

Boarding

8.5

Entertainment

8.2

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!!
Japan Airlines
8.3
Very good
1,596 reviews
Korean Air
8.4
Very good
1,155 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Overall

8.4

Boarding

8.5

Entertainment

8.2

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!!
Asiana Airlines
8.2
Very good
484 reviews
Korean Air
8.4
Very good
1,155 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Overall

8.4

Boarding

8.5

Entertainment

8.2

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
7,998 reviews
Korean Air
8.4
Very good
1,155 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Overall

8.4

Boarding

8.5

Entertainment

8.2

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
10,382 reviews
Korean Air
8.4
Very good
1,155 reviews

Food

8.1

Crew

8.7

Comfort

8.3

Overall

8.4

Boarding

8.5

Entertainment

8.2

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 28h 34m. Fly via United Airlines, American Airlines, or Delta to get the fastest option. South Korea and Illinois are separated by a distance of 6670 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?

    $621 is the cheapest one-way deal found within the past few days, from EVA Air. You may also be able to find cheap deals on American Airlines and Japan Airlines, with prices starting from $724 and $734, 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 $201). Flying from South Korea to Illinois in July is currently the most expensive (average of $980). 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 5 airlines flying from South Korea to Illinois

Discover the top 5 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$229Average$1,356FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$558Average$1,047FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$593Average$959FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$730Average$1,053FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$787Average$1,408FlexibilityNo cancel feeOn-time81%

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