HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$321+ 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Incheon Intl to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$529
(Trip.com)

One-way from

$321
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$820

Good round-trip deal

$1,216 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 Incheon Intl to Illinois
Search Deals
One-way flight from Incheon Intl to Illinois
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($31 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from Incheon Intl to Illinois.
Search Deals

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 4, 2025.

This Jetabroad deal was found by Cheapflights users on 11/2. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:35 pmICN - ORD
1 stop24h 54mAlaska Airlines
Wed 2/118:00 amORD - ICN
1 stop19h 35mAlaska Airlines
Deal found 11/2$597
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 12/258:35 pmICN - ORD
1 stop30h 38mAlaska Airlines
Tue 1/206:06 pmORD - ICN
1 stop33h 29mAlaska Airlines
Deal found 11/3$598
This United Airlines deal was found by Cheapflights users on 11/3. 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
2 stops18h 19mUnited Airlines
Fri 1/236:29 pmORD - ICN
1 stop20h 11mUnited Airlines
Deal found 11/3$600
This United Airlines deal was found by Cheapflights users on 11/4. 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 12/2512:45 pmICN - ORD
1 stop19h 19mUnited Airlines
Thu 2/128:20 pmORD - ICN
1 stop28h 55mUnited Airlines
Deal found 11/4$609
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Sat 12/2712:45 pmICN - ORD
1 stop27h 24mUnited Airlines
Thu 1/222:36 pmORD - ICN
2 stops24h 04mUnited Airlines
Deal found 11/3$635
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Sat 12/2712:45 pmICN - ORD
1 stop27h 24mUnited Airlines
Sat 1/243:59 pmORD - ICN
2 stops22h 41mUnited Airlines
Deal found 11/3$670
This Mytrip deal was found by Cheapflights users on 11/2. 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.
Tue 11/116:55 pmICN - ORD
3 stops34h 36mMultiple Airlines
Thu 11/133:26 pmORD - ICN
3 stops35h 59mMultiple Airlines
Deal found 11/2$687
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 1/203:49 pmORD - ICN
2 stops35h 46mAlaska Airlines
Deal found 11/3$695
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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.
Fri 12/268:35 pmICN - ORD
1 stop24h 54mAlaska Airlines
Sat 1/243:49 pmORD - ICN
2 stops35h 46mAlaska Airlines
Deal found 11/3$696
This American Airlines deal was found by Cheapflights users on 11/4. 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 12/237:15 pmICN - ORD
2 stops25h 19mAmerican Airlines
Tue 12/308:58 pmORD - ICN
1 stop28h 47mAmerican Airlines
Deal found 11/4$706
This American Airlines deal was found by Cheapflights users on 11/4. 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 12/167:15 pmICN - CMI
1 stop16h 12mAmerican Airlines
Wed 12/2411:33 amCMI - ICN
2 stops38h 12mAmerican Airlines
Deal found 11/4$706
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 1/219:00 amORD - ICN
2 stops42h 35mAlaska Airlines
Deal found 11/3$708

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 4, 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

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/6

6:00 pm-10:12 am

2 stops31h 12m

Moline Quad-City

Tue 2/10

8:46 am-5:40 am

2 stops29h 54m

$600

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 12/25

12:45 pm-4:59 pm

2 stops19h 14m

Chicago O'Hare Intl

Tue 1/20

3:59 pm-5:40 am

2 stops22h 41m

$600

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 12/23

12:45 pm-11:25 am

1 stop37h 40m

Chicago O'Hare Intl

Fri 2/6

5:16 pm-5:40 am

1 stop21h 24m

$600

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 3/10

11:45 am-7:50 pm

2 stops22h 05m

Chicago O'Hare Intl

Tue 3/31

5:15 am-3:00 pm

2 stops19h 45m

$600

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 2/2

12:45 pm-7:51 pm

2 stops22h 06m

Chicago O'Hare Intl

Fri 2/13

6:25 am-4:15 pm

1 stop18h 50m

$600

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 2/2

6:00 pm-7:51 pm

1 stop16h 51m

Chicago O'Hare Intl

Fri 2/6

1:55 pm-5:40 am

2 stops24h 45m

$600

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 12/25

12:45 pm-5:04 pm

1 stop19h 19m

Chicago O'Hare Intl

Wed 2/11

9:00 am-5:40 am

1 stop29h 40m

$609

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 12/23

6:00 pm-11:14 pm

1 stop20h 14m

Chicago O'Hare Intl

Thu 2/12

6:25 am-4:15 pm

1 stop18h 50m

$609

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 12/25

6:00 pm-9:32 pm

1 stop18h 32m

Chicago O'Hare Intl

Thu 2/12

6:25 am-4:15 pm

1 stop18h 50m

$609

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/6

7:15 pm-9:58 pm

1 stop17h 43m

Moline Quad-City

Tue 2/10

6:00 am-4:45 pm

1 stop19h 45m

$618

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 52 results
1
2
3
...
6

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 4, 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 4, 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 4, 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
1,160 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Overall

8.4

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
1,160 reviews
Korean Air
8.4
Very good
1,160 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Overall

8.4

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
1,160 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Overall

8.4

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
8,004 reviews
Korean Air
8.4
Very good
1,160 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Overall

8.4

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
9,001 reviews
Korean Air
8.4
Very good
1,160 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Overall

8.4

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
10,404 reviews
Korean Air
8.4
Very good
1,160 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Crew

8.7

Overall

8.4

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 17h 43m. The distance from Incheon Intl Airport to Illinois is about 6503 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 $777. On average you can expect to pay $1,276. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $582.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Incheon Intl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to John F Kennedy Intl flights
Incheon Intl to Los Angeles flights
Incheon Intl to LaGuardia flights
Incheon Intl to Honolulu flights
Incheon Intl to Seattle flights
Gimpo Intl to John F Kennedy Intl flights
Incheon Intl to Dulles Intl flights
Incheon Intl to San Francisco flights
Incheon Intl to Newark flights
Incheon Intl to Boston flights
Incheon Intl to Ontario flights
Incheon Intl to Las Vegas flights
Gimpo Intl to Los Angeles flights
Incheon Intl to Atlanta flights
Incheon Intl to O'Hare Intl flights
Gimpo Intl to Honolulu flights
Incheon Intl to Dallas/Fort Worth flights
Gimpo Intl to Newark flights
Incheon Intl to Baltimore flights
Incheon Intl to Reagan-National flights
Incheon Intl to Santa Ana flights
Gimpo Intl to San Francisco flights
Incheon Intl to San Jose flights
Incheon Intl to Portland flights
Incheon Intl to Hobby flights
Incheon Intl to Miami flights
Gimpo Intl to O'Hare Intl flights
Incheon Intl to Panama City flights
Incheon Intl to Salt Lake City flights
Incheon Intl to Pensacola flights
Incheon Intl to Detroit flights
Incheon Intl to Denver flights
Incheon Intl to San Antonio flights
Incheon Intl to Sky Harbor Intl flights
Incheon Intl to Orlando flights
Incheon Intl to Burbank flights
Incheon Intl to Austin flights
Gimpo Intl to Boston flights
Incheon Intl to Kansas City flights
Incheon Intl to George Bush Intcntl flights
Incheon Intl to Minneapolis flights
Incheon Intl to Love Field flights
Incheon Intl to Midway flights
Incheon Intl to Tampa flights

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 4, 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$1,418FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$730Average$1,053FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.