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$273+ Cheap flights from Incheon Intl (ICN) 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Cheap flight deals from Incheon Intl to Illinois

Keep the following information in mind while searching for Incheon Intl to Illinois flight deals. Data was last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$529
(YBTour)

One-way from

$273
(Trip.com)

Popular in

January

Cheapest in

September

Average price

$811

Good round-trip deal

$1,332 or less

Good one-way deal

$539 or less
Provider with most accurate pricing for Seoul (SEL)-Chicago (CHI) flight deals.
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From Incheon Intl to Illinois
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One-way flight from Incheon Intl to Illinois
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Highest demand for flights based on searches. 12% potential increase in price ($173 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($71 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Incheon Intl to Illinois.
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Price to beat on a one-way flight from Incheon Intl to Illinois.
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Find flight deals from Incheon Intl to Illinois

Cheapest flights from Incheon Intl to Illinois
Explore the most affordable flight options available from Incheon Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This American Airlines deal was found by Cheapflights users on 11/24. 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.
Tue 11/257:15 pmICN - ORD
2 stops27h 22mAmerican Airlines
Thu 11/273:00 pmORD - ICN
2 stops34h 45mAmerican Airlines
Deal found 11/24$547
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Wed 12/106:00 pmICN - ORD
3 stops29h 57mUnited Airlines
Mon 1/126:47 amORD - ICN
1 stop18h 28mUnited Airlines
Deal found 11/24$553
This American Airlines deal was found by Cheapflights users on 11/24. 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.
Mon 11/247:15 pmICN - ORD
2 stops26h 29mAmerican Airlines
Mon 2/29:11 pmORD - ICN
2 stops28h 34mAmerican Airlines
Deal found 11/24$562
This Alaska Airlines deal was found by Cheapflights users on 11/24. 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.
Sat 12/278:35 pmICN - ORD
1 stop24h 54mAlaska Airlines
Wed 1/78:00 amORD - ICN
1 stop19h 35mAlaska Airlines
Deal found 11/24$567
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Wed 12/2412:45 pmICN - ORD
1 stop37h 40mUnited Airlines
Tue 1/66:47 amORD - ICN
1 stop18h 28mUnited Airlines
Deal found 11/24$583
This Alaska Airlines deal was found by Cheapflights users on 11/24. 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.
Sat 12/278:35 pmICN - ORD
1 stop24h 54mAlaska Airlines
Tue 1/66:08 pmORD - ICN
1 stop33h 27mAlaska Airlines
Deal found 11/24$585
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Wed 11/266:00 pmICN - ORD
2 stops19h 50mUnited Airlines
Thu 12/46:55 amORD - ICN
1 stop18h 20mUnited Airlines
Deal found 11/24$586
This United Airlines deal was found by Cheapflights users on 11/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 pmICN - ORD
1 stop22h 09mUnited Airlines
Thu 2/1212:46 pmORD - ICN
1 stop25h 54mUnited Airlines
Deal found 11/26$592
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Mon 11/246:00 pmICN - ORD
1 stop20h 10mUnited Airlines
Mon 2/26:47 amORD - ICN
1 stop18h 28mUnited Airlines
Deal found 11/24$594
This United Airlines deal was found by Cheapflights users on 11/24. 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.
Tue 11/2512:45 pmICN - ORD
2 stops21h 08mUnited Airlines
Wed 1/142:36 pmORD - ICN
2 stops24h 04mUnited Airlines
Deal found 11/24$599
This United Airlines deal was found by Cheapflights users on 11/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:45 pmICN - ORD
1 stop31h 42mUnited Airlines
Wed 2/115:16 pmORD - ICN
1 stop31h 59mUnited Airlines
Deal found 11/26$609
This United Airlines deal was found by Cheapflights users on 11/23. 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.
Wed 12/1012:45 pmICN - STL
2 stops23h 12mUnited Airlines
Thu 1/81:15 pmSTL - ICN
2 stops25h 25mUnited Airlines
Deal found 11/23$640

Cheapflights Fare Finder

 
Customize your flight search to find flights from Incheon Intl 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 November 26, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to Illinois that are best for you.

Fly from

Incheon Intl

Fly to

Illinois

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 12/10

6:00 pm-8:57 am

3 stops29h 57m

Chicago O'Hare Intl

Mon 1/12

6:47 am-4:15 pm

1 stop18h 28m

$553

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 5/25

8:35 pm-10:23 pm

1 stop15h 48m

Chicago O'Hare Intl

Sat 8/29

8:00 am-6:35 pm

1 stop20h 35m

$567

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 3/30

4:50 pm-6:27 am

1 stop27h 37m

Chicago O'Hare Intl

Tue 4/21

5:52 pm-4:20 am

2 stops20h 28m

$586

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 2/2

6:00 pm-9:32 pm

1 stop18h 32m

Chicago O'Hare Intl

Fri 2/13

6:25 am-4:15 pm

1 stop18h 50m

$586

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 12/25

6:00 pm-1:09 am

1 stop22h 09m

Chicago O'Hare Intl

Thu 2/12

12:46 pm-5:40 am

1 stop25h 54m

$592

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 12/24

6:00 pm-5:27 am

1 stop26h 27m

Chicago O'Hare Intl

Wed 2/11

6:29 pm-4:15 pm

1 stop30h 46m

$612

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 3/20

11:45 am-5:12 am

1 stop31h 27m

Chicago O'Hare Intl

Mon 4/6

12:45 pm-4:20 am

1 stop25h 35m

$612

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 2/3

6:00 pm-4:54 am

1 stop25h 54m

Chicago O'Hare Intl

Sat 2/14

6:25 am-4:15 pm

1 stop18h 50m

$617

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 12/10

12:45 pm-4:27 pm

1 stop18h 42m

Lambert-St Louis

Thu 1/8

6:30 am-5:40 am

2 stops32h 10m

$640

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

4:50 pm-5:52 am

1 stop27h 02m

Lambert-St Louis

Tue 4/21

7:06 pm-4:20 am

1 stop19h 14m

$647

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

Showing 1-10 of 52 results
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Best time to book a flight from Incheon Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Incheon Intl 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 Incheon Intl Airport to Illinois

What is the cheapest month to book a flight from Incheon Intl Airport to Illinois?

Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to Illinois (average of $201). Flying from Incheon Intl Airport 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 ICN to IL?

Find hourly flight availability from Incheon Intl 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 November 26, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 31% on flights from Incheon Intl Airport to Illinois by exploring options for tickets in the afternoon.

Weekly flight availability from Incheon Intl Airport to Illinois

Explore weekly flight availability from Incheon Intl 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 November 26, 2025.

The most flights from ICN 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 November 26, 2025.
See what other customers who have flown with Korean Air, Asiana Airlines, and Delta from Incheon Intl Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,172 reviews

Comfort

8.3

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

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
1,172 reviews
Korean Air
8.4
Very good
1,172 reviews

Comfort

8.3

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

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
490 reviews
Korean Air
8.4
Very good
1,172 reviews

Comfort

8.3

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

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
8,001 reviews
Korean Air
8.4
Very good
1,172 reviews

Comfort

8.3

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

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
9,047 reviews
Korean Air
8.4
Very good
1,172 reviews

Comfort

8.3

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

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
10,481 reviews
Korean Air
8.4
Very good
1,172 reviews

Comfort

8.3

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Crew

8.7

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 Incheon Intl 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 Incheon Intl Airport to Illinois?

    Departing from Incheon Intl Airport to Illinois will take you 15h 48m. The distance from Incheon Intl Airport to Illinois is about 6533 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Incheon Intl Airport to Illinois?

    While some choose either Incheon Intl - Chicago Midway or Incheon Intl - Lambert-St Louis, Incheon Intl - Chicago O'Hare Intl is the most popular route from Incheon Intl Airport to Illinois.

  • What are the cheapest flights from Incheon Intl Airport to Illinois?

    The cheapest flight price from Incheon Intl Airport to Illinois is $539. On average you can expect to pay $971. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $529.

  • Can I find deals for flights from Incheon Intl to Illinois that include hotel bookings?

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

  • How can I find direct flights from Incheon Intl to Illinois?

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

  • Can I find deals for business class flights from Incheon Intl to Illinois?

    Yes. Cheapflights offers flight deals from Incheon Intl 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 Incheon Intl Airport to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to Illinois (average of $201). Flying from Incheon Intl Airport 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.

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Alternative routes for Incheon Intl 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 Incheon Intl to Illinois

Discover the top 5 airlines that operate flights from Incheon Intl 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$229Average$1,356FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$558Average$1,047FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$587Average$851FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$687Average$1,388FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$730Average$1,053FlexibilityNo cancel feeOn-time67%

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