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Incheon Intl

$390+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ICN
Feb 8 — Feb 151
Sun 2/8
Sun 2/15
1 adult, Economy
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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 January 9, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$809
(Kiwi.com)

One-way from

$390
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$847

Good round-trip deal

$786 or less

Good one-way deal

$402 or less
Provider with most accurate pricing for Chicago (CHI)-Seoul (SEL) flight deals.
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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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High demand for flights, 4% potential price rise
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Cheapest flight prices on average. 5% potential price decrease ($68 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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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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 January 9, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/8. 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 1/2912:05 pmORD - ICN
1 stop26h 35mMultiple Airlines
Mon 3/96:55 pmICN - ORD
2 stops49h 13mMultiple Airlines
Deal found 1/8$809
This Justfly.com deal was found by Cheapflights users on 1/6. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1111:50 amORD - ICN
1 stop30h 15mTurkish Airlines
Mon 3/1612:10 amICN - ORD
1 stop24h 55mTurkish Airlines
Deal found 1/6$815
This Justfly.com deal was found by Cheapflights users on 1/7. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2811:50 amORD - ICN
1 stop30h 15mTurkish Airlines
Tue 2/312:10 amICN - ORD
1 stop24h 55mTurkish Airlines
Deal found 1/7$818
This Justfly.com deal was found by Cheapflights users on 1/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/28:20 pmORD - ICN
1 stop21h 45mTurkish Airlines
Fri 2/610:45 amICN - ORD
1 stop38h 20mTurkish Airlines
Deal found 1/8$819
This Kiwi.com deal was found by Cheapflights users on 1/8. 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 1/224:38 pmORD - ICN
1 stop22h 02mMultiple Airlines
Thu 4/99:10 pmICN - ORD
2 stops30h 25mMultiple Airlines
Deal found 1/8$829
This SmartFares deal was found by Cheapflights users on 1/8. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/237:32 pmSTL - ICN
1 stop33h 03mAlaska Airlines
Sun 9/68:35 pmICN - STL
1 stop17h 24mAlaska Airlines
Deal found 1/8$834
This Justfly.com deal was found by Cheapflights users on 1/7. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/111:50 amORD - ICN
1 stop39h 30mTurkish Airlines
Wed 2/412:10 amICN - ORD
1 stop24h 55mTurkish Airlines
Deal found 1/7$837
This oojo deal was found by Cheapflights users on 1/7. 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 1/288:20 pmORD - ICN
1 stop31h 00mTurkish Airlines
Mon 2/212:10 amICN - ORD
1 stop33h 15mTurkish Airlines
Deal found 1/7$838
This Justfly.com deal was found by Cheapflights users on 1/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:50 pmORD - ICN
1 stop42h 45mTurkish Airlines
Wed 9/1610:15 amICN - ORD
1 stop46h 00mTurkish Airlines
Deal found 1/8$845
This Justfly.com deal was found by Cheapflights users on 1/7. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/111:50 amORD - ICN
1 stop39h 30mTurkish Airlines
Wed 4/110:15 amICN - ORD
1 stop37h 25mTurkish Airlines
Deal found 1/7$846
This Kiwi.com deal was found by Cheapflights users on 1/7. 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 3/187:00 amSTL - ICN
1 stop21h 35mMultiple Airlines
Sun 3/298:35 pmICN - STL
1 stop17h 24mMultiple Airlines
Deal found 1/7$846
This Justfly.com deal was found by Cheapflights users on 1/7. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1712:50 pmORD - ICN
1 stop39h 30mTurkish Airlines
Wed 3/2512:10 amICN - ORD
1 stop33h 15mTurkish Airlines
Deal found 1/7$847

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 January 9, 2026.
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

Sun 4/5

12:04 pm-4:00 am

1 stop25h 56m

Incheon Intl

Sun 5/31

6:50 pm-8:07 am

1 stop27h 17m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 1/20

3:11 pm-5:40 am

2 stops23h 29m

Incheon Intl

Fri 1/23

12:45 pm-3:37 pm

1 stop17h 52m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/18

5:00 pm-4:00 am

1 stop21h 00m

Incheon Intl

Sat 4/25

6:50 pm-11:33 pm

1 stop18h 43m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 5/4

4:44 pm-4:20 am

2 stops21h 36m

Incheon Intl

Sat 5/23

11:30 am-5:53 pm

1 stop20h 23m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 2/12

7:00 am-4:45 pm

1 stop18h 45m

Incheon Intl

Thu 2/19

7:15 pm-11:48 pm

2 stops19h 33m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

2:40 pm-4:20 am

2 stops23h 40m

Incheon Intl

Wed 4/22

4:50 pm-9:25 am

2 stops30h 35m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 1/22

2:45 pm-5:40 am

2 stops23h 55m

Incheon Intl

Mon 1/26

6:00 pm-10:00 pm

2 stops19h 00m

$851

MolineIncheon

MLI - ICN

MLIICN

Moline Quad-City

Mon 2/23

6:13 am-4:45 pm

1 stop19h 32m

Incheon Intl

Mon 3/2

7:15 pm-11:28 pm

1 stop19h 13m

$917

ChampaignIncheon

CMI - ICN

CMIICN

Champaign University-Willard

Mon 3/2

2:54 pm-4:45 pm

1 stop34h 51m

Incheon Intl

Wed 3/11

5:55 pm-8:54 pm

1 stop16h 59m

$918

MolineIncheon

MLI - ICN

MLIICN

Moline Quad-City

Sat 2/21

5:22 pm-4:15 pm

2 stops31h 53m

Incheon Intl

Sat 2/28

12:45 pm-9:27 pm

2 stops23h 42m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

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 $202). Flying from Illinois to Incheon Intl Airport in July is currently the most expensive (average of $1,124). 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 January 9, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Incheon Intl Airport as you normally would.

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 January 9, 2026.

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 American Airlines fly from Illinois to Incheon Intl Airport in about 19h 32m. The time it takes to get you to your destination can typically vary by up to 6h 24m. Airlines will cover a distance of 6503 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 WestJet, which is currently one of the cheapest options available, starting at $446. Turkish Airlines flights start at $491 while deals on American Airlines start at $504 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 Atlas Air (67%), Delta (59%) or Korean Air (50%) 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 $2,245, our data indicates the cheapest price to be $384. The most popular route (Chicago O'Hare Intl - Incheon Intl), is priced around $804.

  • 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 $202). Flying from Illinois to Incheon Intl Airport in July is currently the most expensive (average of $1,124). 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
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Philadelphia to Incheon Intl flights
Minneapolis to Incheon Intl flights
Newark to Gimpo Intl flights
O'Hare Intl to Gimpo Intl flights
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Detroit to Incheon Intl flights
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Burbank to Incheon Intl flights
George Bush Intcntl to Incheon Intl flights
Baltimore to Gimpo Intl flights
Portland to Incheon Intl flights
Midway to Incheon Intl flights
Las Vegas to Incheon Intl flights
Boston to Gimpo Intl flights
Miami to Incheon Intl flights
Denver to Incheon Intl flights
Charlotte to Incheon Intl flights
Reagan-National to Gimpo Intl flights
Atlanta to Gimpo Intl flights
San Diego to Incheon Intl flights
Honolulu to Gimpo Intl flights
George Bush Intcntl to Gimpo Intl flights
Nashville to Incheon Intl flights

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 January 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$194Average$1,890FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$1,704FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$639Average$911FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$869Average$1,093FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$915Average$1,580FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,003Average$1,264FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$1,095Average$1,328FlexibilityNo cancel feeOn-time67%
FinnairCheapest$1,110Average$1,375FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,557Average$1,901FlexibilityNo cancel feeOn-time81%

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