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$355+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$611
(Alaska Airlines)

One-way from

$355
(Kiwi.com)

Popular in

January

Cheapest in

February

Average price

$1,581

Good round-trip deal

$1,288 or less

Good one-way deal

$1,103 or less
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. 3% potential increase in price ($40 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in September 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 septiembre 11, 2025.

This Travelocity deal was found by Cheapflights users on 9/9. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/176:00 pmICN - ORD
2 stops28h 00mAir Canada
mié. 9/248:25 pmORD - ICN
2 stops29h 50mAir Canada
Deal found 9/9$606
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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.
vie. 11/78:35 pmICN - ORD
2 stops47h 26mAlaska Airlines
lun. 11/108:59 pmORD - ICN
2 stops31h 26mAlaska Airlines
Deal found 9/11$611
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/294:10 pmICN - ORD
1 stop22h 14mMultiple Airlines
mar. 11/183:25 pmORD - ICN
1 stop33h 30mMultiple Airlines
Deal found 9/10$621
This Delta deal was found by Cheapflights users on 9/10. 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.
mar. 10/217:40 pmICN - STL
1 stop18h 44mDelta
sáb. 10/254:45 pmSTL - ICN
1 stop32h 45mDelta
Deal found 9/10$637
This Alaska Airlines deal was found by Cheapflights users on 9/11. 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.
mié. 11/129:25 pmICN - ORD
2 stops41h 34mAlaska Airlines
mié. 12/37:59 pmORD - ICN
2 stops55h 36mAlaska Airlines
Deal found 9/11$637
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/169:00 pmICN - ORD
1 stop16h 30mMultiple Airlines
mié. 2/116:50 pmORD - ICN
1 stop19h 30mMultiple Airlines
Deal found 9/10$643
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/159:00 pmICN - ORD
1 stop16h 30mMultiple Airlines
mié. 2/116:50 pmORD - ICN
1 stop19h 30mMultiple Airlines
Deal found 9/10$652
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/258:35 pmICN - ORD
1 stop17h 31mMultiple Airlines
sáb. 11/18:00 amORD - ICN
1 stop20h 35mMultiple Airlines
Deal found 9/10$667
This WhyPayMore deal was found by Cheapflights users on 9/11. 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.
sáb. 10/186:20 pmICN - ORD
1 stop19h 39mMultiple Airlines
sáb. 10/256:00 amORD - ICN
1 stop21h 55mMultiple Airlines
Deal found 9/11$674
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/149:00 pmICN - ORD
1 stop16h 30mMultiple Airlines
mié. 2/116:50 pmORD - ICN
1 stop19h 30mMultiple Airlines
Deal found 9/10$683
This WhyPayMore deal was found by Cheapflights users on 9/10. 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.
sáb. 10/116:20 pmICN - ORD
1 stop26h 04mMultiple Airlines
sáb. 10/186:00 amORD - ICN
1 stop21h 55mMultiple Airlines
Deal found 9/10$686
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/159:00 pmICN - ORD
1 stop16h 30mMultiple Airlines
vie. 2/136:50 pmORD - ICN
1 stop19h 30mMultiple Airlines
Deal found 9/10$693

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 septiembre 11, 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

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 10/21

7:40 pm-12:24 am

1 stop18h 44m

Lambert-St Louis

sáb. 10/25

4:45 pm-3:30 pm

1 stop32h 45m

$637

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

sáb. 10/18

8:35 pm-6:24 am

1 stop23h 49m

Chicago O'Hare Intl

sáb. 10/25

7:00 am-6:35 pm

2 stops21h 35m

$776

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

lun. 10/6

8:35 pm-2:50 pm

1 stop32h 15m

Chicago O'Hare Intl

mar. 10/14

7:59 pm-6:35 pm

2 stops32h 36m

$782

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 2/13

6:00 pm-6:04 pm

1 stop39h 04m

Lambert-St Louis

lun. 2/16

6:30 am-3:30 pm

1 stop18h 00m

$794

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

sáb. 10/11

8:35 pm-1:04 pm

2 stops30h 29m

Chicago O'Hare Intl

sáb. 10/18

5:59 pm-7:00 pm

2 stops35h 01m

$872

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

lun. 10/6

8:55 pm-1:38 pm

2 stops30h 43m

Chicago Midway

mar. 10/14

5:56 pm-4:55 am

1 stop20h 59m

$938

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

dom. 10/12

9:25 pm-2:50 pm

2 stops31h 25m

Chicago O'Hare Intl

mié. 10/22

7:59 pm-6:35 pm

2 stops32h 36m

$951

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

vie. 10/10

8:45 pm-8:39 am

2 stops25h 54m

Chicago Midway

dom. 10/26

5:56 pm-5:40 am

1 stop21h 44m

$965

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

vie. 2/6

12:45 pm-9:16 pm

2 stops23h 31m

Moline Quad-City

mar. 2/10

8:46 am-5:40 am

2 stops29h 54m

$973

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

jue. 12/18

6:00 pm-10:12 am

2 stops31h 12m

Moline Quad-City

vie. 1/9

10:47 am-5:40 am

2 stops27h 53m

$973

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 50 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 $245). Flying from Incheon Intl Airport to Illinois in March is currently the most expensive (average of $321). 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 septiembre 11, 2025.

When flying from Incheon Intl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 septiembre 11, 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).

How much does it cost to fly round-trip from Incheon Intl Airport to Illinois?

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 septiembre 11, 2025.
See what other customers who have flown with Korean Air, Delta, and United Airlines 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
1,139 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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
8.0
Very good
7,960 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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
8,937 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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!!
American Airlines
7.2
Good
10,000 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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
10,000 reviews
Korean Air
8.4
Very good
1,139 reviews

Entertainment

8.2

Food

8.1

Overall

8.4

Comfort

8.3

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 18h 44m. The distance from Incheon Intl Airport to Illinois is about 6670 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 $1,038. On average you can expect to pay $1,982. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $506.

  • 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 $245). Flying from Incheon Intl Airport to Illinois in March is currently the most expensive (average of $321). 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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Gimpo Intl to Atlanta flights
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Top 6 airlines flying from Incheon Intl to Illinois

Discover the top 6 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$229Average$1,396FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$558Average$1,047FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$730Average$1,053FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$763Average$1,024FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$857Average$1,335FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$959Average$1,590FlexibilityNo cancel feeOn-time69%

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