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Incheon Intl

$383+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ICN
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 November 26, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:00 amSTL - ICN
1 stop18h 30mDelta
Wed 12/39:35 amICN - STL
1 stop26h 12mDelta
Deal found 11/24$846
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/272:35 pmORD - ICN
1 stop31h 10mCathay Pacific
Tue 12/91:45 pmICN - ORD
1 stop38h 10mCathay Pacific
Deal found 11/23$856
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.
Wed 11/265:17 amSTL - ICN
1 stop20h 28mAmerican Airlines
Wed 12/37:15 pmICN - STL
1 stop18h 32mAmerican Airlines
Deal found 11/24$856
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/12:01 pmORD - ICN
1 stop24h 39mMultiple Airlines
Mon 12/81:20 pmICN - ORD
1 stop25h 53mMultiple Airlines
Deal found 11/24$862
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 11/261:35 pmSTL - ICN
2 stops25h 05mUnited Airlines
Wed 12/36:00 pmICN - STL
2 stops19h 45mUnited Airlines
Deal found 11/24$870
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/49:06 pmORD - ICN
1 stop28h 14mMultiple Airlines
Mon 12/1510:20 pmICN - ORD
1 stop22h 45mMultiple Airlines
Deal found 11/23$890
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/64:38 pmORD - ICN
1 stop22h 02mMultiple Airlines
Sun 12/149:20 pmICN - ORD
2 stops31h 15mMultiple Airlines
Deal found 11/24$891
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:20 pmORD - ICN
2 stops40h 15mMultiple Airlines
Tue 12/91:20 pmICN - ORD
1 stop31h 45mMultiple Airlines
Deal found 11/24$892
This Trip.com deal was found by Cheapflights users on 11/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/272:35 pmORD - ICN
1 stop31h 10mCathay Pacific
Tue 12/23:00 pmICN - ORD
1 stop36h 55mCathay Pacific
Deal found 11/25$895
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/12:01 pmORD - ICN
1 stop24h 39mMultiple Airlines
Tue 12/91:20 pmICN - ORD
1 stop31h 45mMultiple Airlines
Deal found 11/24$904
This Kiwi.com deal was found by Cheapflights users on 11/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:36 amORD - ICN
1 stop30h 04mMultiple Airlines
Wed 12/1010:20 pmICN - ORD
2 stops23h 01mMultiple Airlines
Deal found 11/25$905
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/262:35 pmORD - ICN
1 stop32h 20mCathay Pacific
Sat 12/63:00 pmICN - ORD
1 stop36h 55mCathay Pacific
Deal found 11/26$906

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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$746
(Alaska Airlines)

One-way from

$383
(Delta)

Popular in

July

Cheapest in

January

Average price

$1,166

Good round-trip deal

$793 or less

Good one-way deal

$552 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.
Search Deals
From Illinois to Incheon Intl
Search Deals
One-way flight from Illinois to Incheon Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($168 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($30 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 Illinois to Incheon Intl.
Search Deals
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 November 26, 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

Sat 4/18

1:30 pm-4:00 am

1 stop24h 30m

Incheon Intl

Sat 5/2

4:25 pm-11:38 pm

1 stop21h 13m

$746

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 2/15

6:00 am-3:50 pm

1 stop18h 50m

Incheon Intl

Tue 2/17

6:00 pm-11:36 pm

1 stop20h 36m

$746

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 2/2

6:10 am-4:30 pm

2 stops19h 20m

Incheon Intl

Fri 2/6

9:35 am-5:50 pm

2 stops23h 15m

$750

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 3/20

6:04 pm-4:20 pm

1 stop32h 16m

Incheon Intl

Sun 3/29

6:50 pm-11:42 pm

1 stop18h 52m

$751

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 1/10

11:23 am-3:30 pm

1 stop37h 07m

Incheon Intl

Sat 1/17

7:25 pm-8:53 am

1 stop28h 28m

$756

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 2/15

6:35 am-4:50 pm

1 stop19h 15m

Incheon Intl

Wed 5/20

6:40 pm-11:01 pm

1 stop18h 21m

$846

MolineIncheon

MLI - ICN

MLIICN

Moline Quad-City

Fri 1/23

10:47 am-5:40 am

2 stops27h 53m

Incheon Intl

Tue 1/27

12:45 pm-4:54 pm

2 stops19h 09m

$920

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 2/1

2:35 pm-12:45 pm

1 stop31h 10m

Incheon Intl

Wed 2/11

7:35 pm-12:55 pm

1 stop32h 20m

$931

MolineIncheon

MLI - ICN

MLIICN

Moline Quad-City

Fri 1/9

3:45 pm-4:15 pm

2 stops33h 30m

Incheon Intl

Fri 1/16

6:00 pm-8:34 pm

2 stops41h 34m

$933

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 2/17

8:20 pm-6:20 pm

1 stop31h 00m

Incheon Intl

Tue 3/3

12:10 am-10:05 am

1 stop24h 55m

$1,004

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 57 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 $203). Flying from Illinois to Incheon Intl Airport in June is currently the most expensive (average of $1,239). 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 November 26, 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 at noon, which can drop the price by up to 44% versus a flight in the afternoon.

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 November 26, 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 Delta, United Airlines, and Cathay Pacific fly from Illinois to Incheon Intl Airport in about 24h 30m. The time it takes to get you to your destination can typically vary by up to 6h 40m. 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 Delta, which is currently one of the cheapest options available, starting at $383. Alaska Airlines flights start at $383 while deals on United Airlines start at $433 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 (66%), Korean Air (50%) or Atlas Air (24%) 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 $2,226, our data indicates the cheapest price to be $422. The most popular route (Chicago O'Hare Intl - Incheon Intl), is priced around $581.

  • 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 $203). Flying from Illinois to Incheon Intl Airport in June is currently the most expensive (average of $1,239). 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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Dallas/Fort Worth to Gimpo Intl flights
Hobby to Incheon Intl flights
Dulles Intl to Gimpo Intl flights
Newark to Gimpo Intl flights
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Detroit to Incheon Intl flights
San Jose to Incheon Intl flights
Orlando to Incheon Intl flights
O'Hare Intl to Gimpo Intl flights
Reagan-National to Gimpo Intl flights
Philadelphia to Incheon Intl flights
George Bush Intcntl to Incheon Intl flights
Denver to Incheon Intl flights
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Baltimore to Gimpo Intl flights
Boston to Gimpo Intl flights
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Atlanta to Gimpo Intl flights
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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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$194Average$1,881FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$1,704FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$639Average$888FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$848Average$1,024FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$926Average$1,448FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,015Average$1,294FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$1,088Average$1,332FlexibilityNo cancel feeOn-time67%
FinnairCheapest$1,110Average$1,375FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,512Average$1,896FlexibilityNo cancel feeOn-time81%

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