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$458+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
juin 17 — juin 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap 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 juin 12, 2025.

Round-trip from

$751
(United Airlines)

One-way from

$458
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$1,486

Good round-trip deal

$1,183 or less

Good one-way deal

$1,063 or less
From Incheon Intl to Illinois
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One-way flight from Incheon Intl to Illinois
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Highest demand for flights based on searches. 20% potential increase in price ($316 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Incheon Intl to Illinois.
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Price to beat on a one-way flight from Incheon Intl to Illinois.
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Find 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 juin 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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.
lun. 12/1512:45 pmICN - STL
1 stop20h 08mUnited Airlines
ven. 1/307:05 amSTL - ICN
1 stop18h 10mUnited Airlines
Deal found 6/11$735
This Kiwi.com deal was found by Cheapflights users on 6/10. 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.
lun. 10/138:35 pmICN - ORD
1 stop23h 46mMultiple Airlines
jeu. 11/136:00 amORD - ICN
1 stop21h 35mMultiple Airlines
Deal found 6/10$757
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 9/155:25 pmICN - STL
1 stop19h 25mAmerican Airlines
mar. 10/147:19 amSTL - ICN
1 stop18h 11mAmerican Airlines
Deal found 6/12$828
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
ven. 10/108:35 pmICN - ORD
1 stop17h 24mAlaska Airlines
sam. 10/186:00 amORD - ICN
1 stop22h 35mAlaska Airlines
Deal found 6/12$832
This WhyPayMore deal was found by Cheapflights users on 6/9. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 10/315:50 pmICN - ORD
1 stop34h 49mAir Canada
dim. 11/303:40 pmORD - ICN
1 stop34h 25mAir Canada
Deal found 6/9$841
This Asiana Airlines deal was found by Cheapflights users on 6/10. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/198:55 pmICN - STL
1 stop33h 58mMultiple Airlines
dim. 11/165:29 pmSTL - ICN
2 stops33h 06mMultiple Airlines
Deal found 6/10$872
This FlightHub deal was found by Cheapflights users on 6/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/238:40 pmICN - ORD
1 stop37h 14mAsiana Airlines
lun. 1/124:40 pmORD - ICN
1 stop33h 55mAsiana Airlines
Deal found 6/12$910
This United Airlines deal was found by Cheapflights users on 6/11. 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.
mer. 6/256:30 pmICN - ORD
1 stop34h 50mUnited Airlines
sam. 6/286:20 pmORD - ICN
1 stop30h 40mUnited Airlines
Deal found 6/11$921
This Gotogate deal was found by Cheapflights users on 6/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/176:50 pmICN - STL
2 stops35h 36mAir Canada
jeu. 11/204:15 pmSTL - ICN
2 stops33h 50mAir Canada
Deal found 6/11$927
This Hanatour deal was found by Cheapflights users on 6/11. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 9/2412:00 pmICN - ORD
1 stop22h 45mEVA Air
sam. 10/1112:30 amORD - ICN
1 stop21h 55mEVA Air
Deal found 6/11$945
This Mytrip deal was found by Cheapflights users on 6/12. 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.
jeu. 7/38:55 pmICN - STL
1 stop21h 59mAsiana Airlines
sam. 7/266:00 amSTL - ICN
1 stop32h 00mAsiana Airlines
Deal found 6/12$973
This Delta deal was found by Cheapflights users on 6/12. 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.
jeu. 9/186:40 pmICN - MDW
1 stop28h 06mDelta
jeu. 10/169:20 amMDW - ICN
1 stop18h 00mDelta
Deal found 6/12$1,190

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 juin 12, 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

lun. 9/15

11:30 am-4:53 pm

1 stop19h 23m

Lambert-St Louis

mar. 10/14

5:47 pm-4:20 am

1 stop20h 33m

$751

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

lun. 10/13

8:35 pm-6:21 am

1 stop23h 46m

Chicago O'Hare Intl

jeu. 11/13

6:00 am-6:35 pm

1 stop21h 35m

$757

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 9/15

5:25 pm-10:50 pm

1 stop19h 25m

Lambert-St Louis

mar. 10/14

7:19 am-3:30 pm

1 stop18h 11m

$828

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

ven. 10/10

8:35 pm-11:59 pm

1 stop17h 24m

Chicago O'Hare Intl

sam. 10/18

6:00 am-6:35 pm

1 stop22h 35m

$832

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

ven. 10/31

5:50 pm-2:39 pm

1 stop34h 49m

Chicago O'Hare Intl

dim. 11/30

3:40 pm-5:05 pm

1 stop34h 25m

$841

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 8/19

8:55 pm-4:53 pm

1 stop33h 58m

Lambert-St Louis

dim. 11/16

5:29 pm-5:35 pm

2 stops33h 06m

$872

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mer. 6/25

6:30 pm-3:20 pm

1 stop34h 50m

Chicago O'Hare Intl

sam. 6/28

6:20 pm-3:00 pm

1 stop30h 40m

$921

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 11/17

6:50 pm-3:26 pm

2 stops35h 36m

Lambert-St Louis

jeu. 11/20

4:15 pm-5:05 pm

2 stops33h 50m

$927

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mer. 9/10

2:40 pm-8:25 pm

1 stop19h 45m

Chicago O'Hare Intl

mar. 9/30

6:26 pm-4:20 am

1 stop19h 54m

$937

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mer. 9/24

12:00 pm-8:45 pm

1 stop22h 45m

Chicago O'Hare Intl

sam. 10/11

12:30 am-12:25 pm

1 stop21h 55m

$945

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 39 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 $245). Flying from Incheon Intl Airport to Illinois in March is currently the most expensive (average of $321). 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 juin 12, 2025.

When flying from Incheon Intl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 juin 12, 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).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 juin 12, 2025.
Peruse reviews from past customers who have flown with EVA Air, Korean Air and Asiana Airlines from Seoul to Illinois to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,202 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,088 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Asiana Airlines
8.2
Very good
440 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Delta
8.0
Very good
7,950 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Alaska Airlines
8.0
Very good
10,000 reviews
EVA Air
8.4
Very good
1,202 reviews

Boarding

8.4

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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.

  • 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 $549. However, be on the lookout for offers from Air Canada and WestJet, 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 $1,051. On average you can expect to pay $1,405. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $737.

  • 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 $245). Flying from Incheon Intl Airport to Illinois in March is currently the most expensive (average of $321). 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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Gimpo Intl to Atlanta flights
Incheon Intl to Miami flights

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 juin 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$229Average$1,396FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$558Average$1,137FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$697Average$992FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$730Average$1,053FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$851Average$1,590FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$857Average$1,323FlexibilityNo cancel feeOn-time81%

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