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$370+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
abr. 2 — abr. 91
mié. 4/2
mié. 4/9
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 marzo 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$690
(Kiwi.com)

One-way from

$370
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$1,093

Good round-trip deal

$1,406 or less

Good one-way deal

$1,154 or less
Provider with most accurate pricing for Seoul (SEL)-Chicago (CHI) flight deals.
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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. 22% potential increase in price ($364 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in March 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 marzo 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/1012:45 pmICN - ORD
1 stop24h 20mMultiple Airlines
mié. 4/2310:26 pmORD - ICN
1 stop27h 19mMultiple Airlines
Deal found 3/26$690
This WhyPayMore deal was found by Cheapflights users on 3/27. 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.
vie. 5/305:45 pmICN - ORD
1 stop34h 58mAir Canada
lun. 6/23:35 pmORD - ICN
1 stop34h 30mAir Canada
Deal found 3/27$716
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/95:25 pmICN - ORD
1 stop20h 24mAmerican Airlines
mar. 4/296:55 amORD - ICN
1 stop18h 35mAmerican Airlines
Deal found 3/26$849
This United Airlines deal was found by Cheapflights users on 3/27. 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. 4/144:50 pmICN - STL
2 stops31h 06mUnited Airlines
vie. 4/185:54 pmSTL - ICN
1 stop20h 26mUnited Airlines
Deal found 3/27$852
This Mytrip deal was found by Cheapflights users on 3/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/105:45 pmICN - STL
2 stops35h 04mAir Canada
sáb. 4/193:40 pmSTL - ICN
2 stops58h 25mAir Canada
Deal found 3/26$864
This Gotogate deal was found by Cheapflights users on 3/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/108:45 pmICN - ORD
1 stop33h 59mWestJet
vie. 9/125:30 pmORD - ICN
1 stop36h 10mWestJet
Deal found 3/26$909
This Trip.com deal was found by Cheapflights users on 3/27. 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.
dom. 5/116:20 pmICN - MDW
2 stops38h 48mMultiple Airlines
dom. 5/186:15 amMDW - ICN
2 stops24h 15mMultiple Airlines
Deal found 3/27$972
This Delta deal was found by Cheapflights users on 3/27. 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.
lun. 9/156:40 pmICN - STL
1 stop18h 21mDelta
mar. 10/143:30 pmSTL - ICN
1 stop32h 40mDelta
Deal found 3/27$991
This Gotogate deal was found by Cheapflights users on 3/27. 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.
vie. 5/308:55 pmICN - STL
1 stop22h 08mAsiana Airlines
vie. 8/15:41 pmSTL - ICN
1 stop20h 19mAsiana Airlines
Deal found 3/27$1,160
This Delta deal was found by Cheapflights users on 3/27. 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.
jue. 9/186:40 pmICN - MDW
1 stop32h 22mDelta
jue. 10/169:20 amMDW - ICN
1 stop18h 00mDelta
Deal found 3/27$1,203
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/106:20 pmICN - STL
1 stop19h 39mMultiple Airlines
sáb. 4/195:58 pmSTL - ICN
1 stop20h 32mMultiple Airlines
Deal found 3/26$1,348
This Air France deal was found by Cheapflights users on 3/27. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/1010:25 pmICN - MDW
2 stops34h 20mKLM
mié. 5/149:20 amMDW - ICN
2 stops41h 05mKLM
Deal found 3/27$1,404

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 marzo 28, 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

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

jue. 4/10

12:45 pm-11:05 pm

1 stop24h 20m

Chicago O'Hare Intl

mié. 4/23

10:26 pm-3:45 pm

1 stop27h 19m

$690

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

vie. 5/30

5:45 pm-2:43 pm

1 stop34h 58m

Chicago O'Hare Intl

lun. 6/2

3:35 pm-4:05 pm

1 stop34h 30m

$716

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mié. 4/9

5:25 pm-11:49 pm

1 stop20h 24m

Chicago O'Hare Intl

mar. 4/29

6:55 am-3:30 pm

1 stop18h 35m

$849

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 4/14

4:50 pm-9:56 am

2 stops31h 06m

Lambert-St Louis

vie. 4/18

5:54 pm-4:20 am

1 stop20h 26m

$852

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 4/10

5:45 pm-2:49 pm

2 stops35h 04m

Lambert-St Louis

sáb. 4/19

3:40 pm-4:05 pm

2 stops58h 25m

$864

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mar. 6/10

8:45 pm-4:44 pm

1 stop33h 59m

Chicago O'Hare Intl

vie. 9/12

5:30 pm-7:40 pm

1 stop36h 10m

$909

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

dom. 5/11

6:20 pm-7:08 pm

2 stops38h 48m

Chicago Midway

dom. 5/18

6:15 am-8:30 pm

2 stops24h 15m

$972

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 9/15

6:40 pm-11:01 pm

1 stop18h 21m

Lambert-St Louis

mar. 10/14

3:30 pm-2:10 pm

1 stop32h 40m

$991

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 5/30

8:55 pm-5:03 am

1 stop22h 08m

Lambert-St Louis

vie. 8/1

5:41 pm-4:00 am

1 stop20h 19m

$1,160

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 6/16

5:25 pm-9:18 am

1 stop29h 53m

Lambert-St Louis

lun. 8/4

5:30 am-3:30 pm

1 stop20h 00m

$1,168

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 34 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 $323). 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 marzo 28, 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 marzo 28, 2025.

The most flights from ICN to USIL are scheduled on a Wednesday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 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 marzo 28, 2025.
Peruse reviews from past customers who have flown with Korean Air, Asiana Airlines and Delta 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.
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Korean Air
8.4
Very good
1,050 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Asiana Airlines
8.2
Very good
440 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Delta
8.0
Very good
7,897 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
KLM
7.8
Good
1,321 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Qatar Airways
7.4
Good
3,538 reviews
Korean Air
8.4
Very good
1,050 reviews

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

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 WestJet, with whom users have recently found tickets for as low as $447. However, be on the lookout for offers from American Airlines and United Airlines, 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 $895. On average you can expect to pay $1,448. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $685.

  • 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 $323). 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 Boston flights
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Top 5 airlines flying from Incheon Intl to Illinois

Discover the top 5 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 marzo 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$697Average$989FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$834Average$1,230FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,111Average$1,590FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$1,186Average$1,422FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,269Average$1,520FlexibilityNo cancel feeOn-timeN/A
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