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Incheon Intl

$382+ Cheap flights from Illinois to Incheon Intl (ICN)

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ICN
Nov 16 — Nov 231
Sun 11/16
Sun 11/23
1 adult, Economy
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Find flight deals from Illinois to Incheon Intl

Cheapest flights from Illinois to Incheon Intl
Explore the most affordable flight options available from Illinois to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 11/1312:30 pmMDW - ICN
2 stops49h 40mMultiple Airlines
Wed 11/199:55 pmICN - MDW
1 stop28h 47mMultiple Airlines
Deal found 10/15$812
This Mytrip deal was found by Cheapflights users on 10/15. 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 11/1110:00 amORD - ICN
3 stops35h 20mMultiple Airlines
Tue 11/181:20 pmICN - ORD
2 stops33h 08mMultiple Airlines
Deal found 10/15$812
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 11/1312:30 pmMDW - ICN
2 stops49h 40mMultiple Airlines
Tue 11/189:55 pmICN - MDW
1 stop17h 00mMultiple Airlines
Deal found 10/15$818
This lol.travel deal was found by Cheapflights users on 10/16. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/273:35 pmORD - ICN
1 stop37h 00mCathay Pacific
Mon 11/101:45 pmICN - ORD
1 stop38h 10mCathay Pacific
Deal found 10/16$823
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 11/146:30 amORD - ICN
1 stop31h 40mMultiple Airlines
Wed 12/31:05 pmICN - ORD
2 stops55h 55mMultiple Airlines
Deal found 10/16$834
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 11/146:30 amORD - ICN
1 stop31h 40mMultiple Airlines
Fri 11/216:55 pmICN - ORD
2 stops50h 30mMultiple Airlines
Deal found 10/15$838
This American Airlines deal was found by Cheapflights users on 10/17. 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 11/107:00 amSTL - ICN
1 stop18h 45mAmerican Airlines
Thu 11/277:15 pmICN - STL
1 stop35h 14mAmerican Airlines
Deal found 10/17$842
This Kiwi.com deal was found by Cheapflights users on 10/16. 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 11/146:30 amORD - ICN
1 stop31h 40mMultiple Airlines
Thu 11/279:20 pmICN - ORD
2 stops31h 15mMultiple Airlines
Deal found 10/16$843
This Delta deal was found by Cheapflights users on 10/17. 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.
Fri 10/246:50 amSTL - ICN
1 stop18h 30mDelta
Sat 11/17:30 pmICN - STL
1 stop17h 37mDelta
Deal found 10/17$846
This Kiwi.com deal was found by Cheapflights users on 10/16. 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.
Thu 11/136:30 amORD - ICN
1 stop42h 50mMultiple Airlines
Wed 12/31:05 pmICN - ORD
2 stops55h 55mMultiple Airlines
Deal found 10/16$848
This Kiwi.com deal was found by Cheapflights users on 10/16. 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.
Thu 11/136:30 amORD - ICN
2 stops38h 50mMultiple Airlines
Thu 11/271:20 pmICN - ORD
1 stop26h 39mMultiple Airlines
Deal found 10/16$850
This American Airlines deal was found by Cheapflights users on 10/14. 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 12/95:14 amSTL - ICN
1 stop20h 31mAmerican Airlines
Sun 12/287:15 pmICN - STL
1 stop30h 35mAmerican Airlines
Deal found 10/14$852

Cheap flight deals from Illinois to Incheon Intl

Keep the following information in mind while searching for Illinois to Incheon Intl flight deals. Data was last updated October 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$766
(Alaska Airlines)

One-way from

$382
(Kiwi.com)

Popular in

May

Cheapest in

January

Average price

$1,213

Good round-trip deal

$746 or less

Good one-way deal

$502 or less
Provider with most accurate pricing for Chicago (CHI)-Seoul (SEL) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Seoul (SEL) flights.
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From Illinois to Incheon Intl
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One-way flight from Illinois to Incheon Intl
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Highest demand for flights based on searches. 14% potential increase in price ($222 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($33 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 Illinois to Incheon Intl.
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Price to beat on a one-way flight from Illinois to Incheon Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Incheon Intl 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 October 17, 2025.
Use the filters below to find and compare flights from Illinois to Incheon Intl Airport that are best for you.

Fly from

Illinois

Fly to

Incheon Intl

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/4

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sat 3/7

8:35 pm-11:56 pm

1 stop18h 21m

$766

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/4

2:55 pm-6:35 pm

1 stop37h 40m

Incheon Intl

Wed 4/15

8:35 pm-11:55 pm

1 stop17h 20m

$773

ChicagoIncheon

MDW - ICN

MDWICN

Chicago Midway

Thu 11/13

12:30 pm-5:10 am

2 stops49h 40m

Incheon Intl

Tue 11/18

9:55 pm-11:55 pm

1 stop17h 00m

$818

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

7:00 am-4:45 pm

1 stop18h 45m

Incheon Intl

Thu 11/27

7:15 pm-3:29 pm

1 stop35h 14m

$842

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 2/9

5:00 pm-5:40 am

1 stop21h 40m

Incheon Intl

Thu 3/5

12:45 pm-4:44 pm

1 stop18h 59m

$846

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

6:34 am-4:20 pm

1 stop18h 46m

Incheon Intl

Thu 11/27

6:00 pm-9:58 pm

1 stop18h 58m

$846

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 12/8

6:00 am-4:30 pm

2 stops19h 30m

Incheon Intl

Fri 12/26

7:40 pm-9:34 pm

1 stop16h 54m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 12/1

5:17 am-4:45 pm

1 stop20h 28m

Incheon Intl

Mon 12/8

7:15 pm-10:47 pm

1 stop18h 32m

$856

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 3/19

3:35 pm-1:55 pm

1 stop32h 20m

Incheon Intl

Wed 3/25

3:00 pm-1:55 pm

1 stop36h 55m

$881

MolineIncheon

MLI - ICN

MLIICN

Moline Quad-City

Thu 2/12

8:30 am-5:40 am

2 stops30h 10m

Incheon Intl

Mon 2/16

6:00 pm-10:14 am

2 stops31h 14m

$924

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

Showing 1-10 of 56 results
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Best time to book a flight from Illinois to Incheon Intl

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

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Incheon Intl Airport (average of $207). Flying from Illinois to Incheon Intl Airport in June is currently the most expensive (average of $1,248). 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 IL to ICN?

Find hourly flight availability from Illinois to Incheon Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 17, 2025.

When flying from Illinois to Incheon Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 51% versus a flight in the morning.

Weekly flight availability from Illinois to Incheon Intl Airport

Explore weekly flight availability from Illinois to Incheon Intl. 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 October 17, 2025.

The most flights from USIL to ICN 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).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Incheon Intl. 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 Illinois to Incheon Intl Airport?

    Airlines like Alaska Airlines, American Airlines, and United Airlines fly from Illinois to Incheon Intl Airport in about 18h 45m. The time it takes to get you to your destination can typically vary by up to 2h 55m. Airlines will cover 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 Illinois to Incheon Intl Airport one-way?

    To fly one-way, consider booking your trip with Hawaiian Airlines, which is currently one of the cheapest options available, starting at $401. Delta flights start at $423 while deals on United Airlines start at $448 one-way.

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

    The most popular route from Illinois to Incheon Intl Airport is Chicago O'Hare Intl - Incheon Intl. You may also consider Chicago Midway - Incheon Intl or Lambert-St Louis - Incheon Intl.

  • What are the most reliable airlines from Illinois to Incheon Intl Airport?

    Consider Delta (82%), Korean Air (53%) or Atlas Air (0%) when booking your flight. These represent the most reliable airlines when flying from Illinois to Incheon Intl Airport.

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

    Looking for the cheapest flight from Illinois to Incheon Intl Airport? While on average our users pay $2,006, our data indicates the cheapest price to be $387. The most popular route (Chicago O'Hare Intl - Incheon Intl), is priced around $838.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Illinois to Incheon Intl Airport (average of $207). Flying from Illinois to Incheon Intl Airport in June is currently the most expensive (average of $1,248). 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

Traveling to a place near Incheon Intl Airport?

Book flights to Incheon Intl Airport if you plan to visit one of these locations
Suwon
Seongnam

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Alternative routes for Illinois to Incheon Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Illinois to Incheon Intl

Discover the top 9 airlines that operate flights from Illinois to Incheon Intl. 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 October 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$196Average$1,903FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$1,051FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$639Average$887FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$848Average$1,069FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$927Average$1,348FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,015Average$1,297FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$1,032Average$1,330FlexibilityNo cancel feeOn-time67%
FinnairCheapest$1,110Average$1,375FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,509Average$1,882FlexibilityNo cancel feeOn-time81%

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