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Incheon Intl

$358+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ICN
Dec 7 — Dec 141
Sun 12/7
Sun 12/14
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 7, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/32:01 pmORD - ICN
1 stop24h 39mMultiple Airlines
Sun 12/149:20 pmICN - ORD
2 stops37h 57mMultiple Airlines
Deal found 11/6$814
This American Airlines deal was found by Cheapflights users on 11/5. 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 11/107:58 pmSTL - ICN
2 stops29h 47mAmerican Airlines
Thu 11/277:15 pmICN - STL
2 stops33h 02mAmerican Airlines
Deal found 11/5$833
This United Airlines deal was found by Cheapflights users on 11/5. 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 11/65:24 pmSTL - ICN
2 stops21h 16mUnited Airlines
Mon 11/1012:45 pmICN - STL
1 stop18h 42mUnited Airlines
Deal found 11/5$846
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 12/59:06 pmORD - ICN
1 stop28h 14mMultiple Airlines
Sun 12/149:20 pmICN - ORD
2 stops35h 07mMultiple Airlines
Deal found 11/4$850
This United Airlines deal was found by Cheapflights users on 11/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/74:35 pmSTL - ICN
2 stops32h 40mUnited Airlines
Wed 11/1212:45 pmICN - STL
1 stop18h 42mUnited Airlines
Deal found 11/6$850
This American Airlines deal was found by Cheapflights users on 11/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:58 pmSTL - ICN
1 stop31h 47mAmerican Airlines
Wed 11/127:15 pmICN - STL
1 stop16h 29mAmerican Airlines
Deal found 11/6$852
This Mytrip deal was found by Cheapflights users on 11/4. 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 12/24:58 pmORD - ICN
3 stops28h 22mMultiple Airlines
Tue 12/91:20 pmICN - ORD
2 stops31h 45mMultiple Airlines
Deal found 11/4$854
This oojo deal was found by Cheapflights users on 11/4. 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 11/52:35 pmORD - ICN
1 stop31h 10mCathay Pacific
Wed 11/123:00 pmICN - ORD
1 stop36h 55mCathay Pacific
Deal found 11/4$857
This American Airlines deal was found by Cheapflights users on 11/5. 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 11/65:17 amSTL - ICN
1 stop20h 28mAmerican Airlines
Mon 11/107:15 pmICN - STL
1 stop28h 40mAmerican Airlines
Deal found 11/5$862
This United Airlines deal was found by Cheapflights users on 11/4. 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 11/121:35 pmSTL - ICN
2 stops25h 05mUnited Airlines
Tue 11/1812:45 pmICN - STL
1 stop18h 42mUnited Airlines
Deal found 11/4$866
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/106:55 pmICN - ORD
2 stops44h 17mMultiple Airlines
Deal found 11/5$870
This Delta deal was found by Cheapflights users on 11/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:40 pmSTL - ICN
2 stops29h 50mDelta
Wed 11/129:35 amICN - STL
2 stops21h 32mDelta
Deal found 11/6$870

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 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$766
(Orbitz)

One-way from

$358
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$1,086

Good round-trip deal

$782 or less

Good one-way deal

$556 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. 12% potential increase in price ($191 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 7, 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

Mon 3/2

3:15 pm-5:40 am

2 stops23h 25m

Incheon Intl

Tue 3/31

11:30 am-5:53 pm

1 stop20h 23m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 4/6

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Wed 4/29

8:35 pm-11:55 pm

1 stop17h 20m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 4/7

7:30 am-3:20 pm

1 stop17h 50m

Incheon Intl

Sun 4/26

7:40 pm-12:36 am

1 stop18h 56m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 4/7

1:00 pm-4:00 am

1 stop25h 00m

Incheon Intl

Wed 4/29

7:40 pm-12:36 am

1 stop18h 56m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/9

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Mon 4/27

8:35 pm-11:55 pm

1 stop17h 20m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 2/6

6:10 am-3:30 pm

1 stop18h 20m

Incheon Intl

Fri 2/13

9:35 am-4:44 pm

1 stop22h 09m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/9

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Sat 4/25

8:35 pm-11:55 pm

1 stop17h 20m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 4/26

11:51 am-4:00 am

1 stop26h 09m

Incheon Intl

Wed 4/29

7:40 pm-12:36 am

1 stop18h 56m

$866

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Mon 2/2

2:35 pm-12:45 pm

1 stop31h 10m

Incheon Intl

Tue 3/3

10:00 am-12:55 pm

1 stop41h 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-10:16 am

2 stops31h 16m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 50 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 $215). 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 November 7, 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 50% 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 7, 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 United Airlines, Alaska Airlines, and Delta fly from Illinois to Incheon Intl Airport in about 17h 50m. The time it takes to get you to your destination can typically vary by up to 5h 35m. 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 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 (78%), Korean Air (51%) 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 $2,226, our data indicates the cheapest price to be $422. The most popular route (Chicago O'Hare Intl - Incheon Intl), is priced around $835.

  • 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 $215). 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 November 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$194Average$1,886FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$1,704FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$639Average$891FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$848Average$1,075FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$926Average$1,348FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,015Average$1,292FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$1,067Average$1,332FlexibilityNo cancel feeOn-time67%
FinnairCheapest$1,110Average$1,375FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,503Average$1,886FlexibilityNo cancel feeOn-time81%

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