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$401+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap 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 December 26, 2025.

This American Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/257:15 pmICN - ORD
1 stop17h 02mAmerican Airlines
Fri 2/66:54 amORD - ICN
1 stop18h 51mAmerican Airlines
Deal found 12/24$571
This Kiwi.com deal was found by Cheapflights users on 12/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:35 pmICN - ORD
1 stop18h 24mMultiple Airlines
Thu 1/88:00 amORD - ICN
1 stop19h 35mMultiple Airlines
Deal found 12/24$574
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Fri 12/2612:45 pmICN - ORD
2 stops22h 15mUnited Airlines
Thu 1/811:15 amORD - ICN
2 stops27h 25mUnited Airlines
Deal found 12/24$602
This American Airlines deal was found by Cheapflights users on 12/24. 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.
Sat 12/277:15 pmICN - ORD
2 stops26h 28mAmerican Airlines
Mon 12/2910:17 pmORD - ICN
2 stops27h 28mAmerican Airlines
Deal found 12/24$611
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/256:00 pmICN - ORD
1 stop22h 09mUnited Airlines
Thu 1/82:40 pmORD - ICN
1 stop24h 00mUnited Airlines
Deal found 12/24$613
This United Airlines deal was found by Cheapflights users on 12/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2612:45 pmICN - ORD
2 stops21h 00mUnited Airlines
Thu 1/16:15 amORD - ICN
1 stop19h 00mUnited Airlines
Deal found 12/25$614
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/2512:45 pmICN - ORD
2 stops19h 14mUnited Airlines
Thu 2/126:25 amORD - ICN
1 stop18h 50mUnited Airlines
Deal found 12/24$617
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Sat 12/276:00 pmICN - ORD
1 stop26h 27mUnited Airlines
Mon 12/2910:10 pmORD - ICN
1 stop40h 30mUnited Airlines
Deal found 12/24$637
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Sat 12/276:00 pmICN - ORD
1 stop20h 14mUnited Airlines
Thu 1/82:40 pmORD - ICN
1 stop24h 00mUnited Airlines
Deal found 12/24$647
This United Airlines deal was found by Cheapflights users on 12/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 pmICN - ORD
1 stop22h 09mUnited Airlines
Sat 1/310:10 pmORD - ICN
1 stop27h 05mUnited Airlines
Deal found 12/25$693
This United Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/256:00 pmICN - STL
2 stops37h 27mUnited Airlines
Sat 12/277:00 amSTL - ICN
2 stops31h 40mUnited Airlines
Deal found 12/24$842
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:30 pmICN - STL
1 stop17h 46mDelta
Sat 12/276:25 pmSTL - ICN
1 stop31h 25mDelta
Deal found 12/24$1,172

Find 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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$546
(Vliegwinkel)

One-way from

$401
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$830

Good round-trip deal

$1,320 or less

Good one-way deal

$1,123 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 Incheon Intl to Illinois
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One-way flight from Incheon Intl to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($74 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Incheon Intl to Illinois.
Search Deals
Price to beat on a one-way flight from Incheon Intl to Illinois.
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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 December 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

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/5

7:15 pm-10:59 pm

1 stop18h 44m

Lambert-St Louis

Mon 2/9

9:54 am-4:45 pm

2 stops39h 51m

$554

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 2/24

7:15 pm-11:25 pm

1 stop19h 10m

Chicago O'Hare Intl

Tue 3/3

7:25 pm-4:45 pm

1 stop30h 20m

$574

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 2/4

7:15 pm-11:44 pm

1 stop19h 29m

Chicago O'Hare Intl

Sun 2/8

1:15 pm-4:45 pm

1 stop36h 30m

$574

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 4/1

8:35 pm-11:59 pm

1 stop17h 24m

Chicago O'Hare Intl

Thu 4/30

8:00 am-6:35 pm

1 stop20h 35m

$592

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/27

6:00 pm-11:46 am

2 stops32h 46m

Moline Quad-City

Mon 3/2

3:52 pm-5:40 am

2 stops22h 48m

$603

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 2/20

12:45 pm-8:35 pm

2 stops22h 50m

Chicago O'Hare Intl

Fri 2/27

6:25 am-4:15 pm

1 stop18h 50m

$604

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 2/4

12:45 pm-9:44 am

2 stops35h 59m

Chicago O'Hare Intl

Sun 2/8

5:16 pm-4:15 pm

1 stop31h 59m

$614

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/27

7:15 pm-11:45 pm

2 stops43h 30m

Moline Quad-City

Mon 3/2

6:13 am-4:45 pm

1 stop19h 32m

$616

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 2/24

12:45 pm-6:55 pm

2 stops21h 10m

Chicago O'Hare Intl

Tue 3/3

2:30 pm-5:40 am

2 stops24h 10m

$617

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

7:00 pm-12:22 am

2 stops19h 22m

Lambert-St Louis

Tue 4/21

3:25 pm-5:20 pm

1 stop35h 55m

$629

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 58 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 January is currently the most expensive (average of $1,091). 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 December 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 December 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).

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 December 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
1,185 reviews

Food

8.1

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

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
1,185 reviews
Korean Air
8.4
Very good
1,185 reviews

Food

8.1

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

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!!
Asiana Airlines
8.2
Very good
500 reviews
Korean Air
8.4
Very good
1,185 reviews

Food

8.1

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

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
8,014 reviews
Korean Air
8.4
Very good
1,185 reviews

Food

8.1

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

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
9,115 reviews
Korean Air
8.4
Very good
1,185 reviews

Food

8.1

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

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
10,562 reviews
Korean Air
8.4
Very good
1,185 reviews

Food

8.1

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

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 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 15m. The distance from Incheon Intl Airport to Illinois is about 6533 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Incheon Intl Airport to Illinois one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $476. However, be on the lookout for offers from Air Canada and Korean Air, as they are both options that can get you from Incheon Intl Airport to Illinois for a low price.

  • 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 $1,064. On average you can expect to pay $1,740. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $575.

  • 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 January is currently the most expensive (average of $1,091). 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 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 December 26, 2025.
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$1,326FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$730Average$1,062FlexibilityNo cancel feeOn-time67%

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