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$370+ Cheap flights from South Korea 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
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap flight deals from South Korea to Illinois

Keep the following information in mind while searching for South Korea to Illinois flight deals. Data was last updated March 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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Provider most trusted by Cheapflights users for Seoul (SEL)-Chicago (CHI) flights.
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From South Korea to Illinois
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One-way flight from South Korea 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 South Korea to Illinois.
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Price to beat on a one-way flight from South Korea to Illinois.
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Find flight deals from South Korea to Illinois

Cheapest flights from South Korea to Illinois
Explore the most affordable flight options available from South Korea to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 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.
Thu 4/1012:45 pmICN - ORD
1 stop24h 20mMultiple Airlines
Wed 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.
Fri 5/305:45 pmICN - ORD
1 stop34h 58mAir Canada
Mon 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.
Wed 4/95:25 pmICN - ORD
1 stop20h 24mAmerican Airlines
Tue 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.
Mon 4/144:50 pmICN - STL
2 stops31h 06mUnited Airlines
Fri 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.
Thu 4/105:45 pmICN - STL
2 stops35h 04mAir Canada
Sat 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.
Tue 6/108:45 pmICN - ORD
1 stop33h 59mWestJet
Fri 9/125:30 pmORD - ICN
1 stop36h 10mWestJet
Deal found 3/26$909
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:55 pmGMP - ORD
1 stop26h 45mANA
Mon 10/205:45 pmORD - GMP
1 stop27h 20mANA
Deal found 3/27$927
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.
Sun 5/116:20 pmICN - MDW
2 stops38h 48mMultiple Airlines
Sun 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.
Mon 9/156:40 pmICN - STL
1 stop18h 21mDelta
Tue 10/143:30 pmSTL - ICN
1 stop32h 40mDelta
Deal found 3/27$991
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/113:45 pmPUS - ORD
2 stops28h 57mMultiple Airlines
Sun 5/188:37 amORD - PUS
2 stops33h 28mMultiple Airlines
Deal found 3/27$1,068
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:55 amGMP - ORD
1 stop15h 10mJapan Airlines
Tue 10/216:00 amORD - GMP
2 stops25h 50mJapan Airlines
Deal found 3/27$1,096
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.
Fri 5/308:55 pmICN - STL
1 stop22h 08mAsiana Airlines
Fri 8/15:41 pmSTL - ICN
1 stop20h 19mAsiana Airlines
Deal found 3/27$1,160

Cheapflights Fare Finder

Customize your flight search to find flights from South Korea 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 March 28, 2025.
Use the filters below to find and compare flights from South Korea to Illinois that are best for you.

Fly from

South Korea

Fly to

Illinois

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 4/10

12:45 pm-11:05 pm

1 stop24h 20m

Chicago O'Hare Intl

Wed 4/23

10:26 pm-3:45 pm

1 stop27h 19m

$690

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 5/30

5:45 pm-2:43 pm

1 stop34h 58m

Chicago O'Hare Intl

Mon 6/2

3:35 pm-4:05 pm

1 stop34h 30m

$716

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 4/9

5:25 pm-11:49 pm

1 stop20h 24m

Chicago O'Hare Intl

Tue 4/29

6:55 am-3:30 pm

1 stop18h 35m

$849

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/14

4:50 pm-9:56 am

2 stops31h 06m

Lambert-St Louis

Fri 4/18

5:54 pm-4:20 am

1 stop20h 26m

$852

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 4/10

5:45 pm-2:49 pm

2 stops35h 04m

Lambert-St Louis

Sat 4/19

3:40 pm-4:05 pm

2 stops58h 25m

$864

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 6/10

8:45 pm-4:44 pm

1 stop33h 59m

Chicago O'Hare Intl

Fri 9/12

5:30 pm-7:40 pm

1 stop36h 10m

$909

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Wed 9/17

7:55 pm-8:40 am

1 stop26h 45m

Chicago O'Hare Intl

Mon 10/20

5:45 pm-11:05 am

1 stop27h 20m

$927

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Sun 5/11

6:20 pm-7:08 pm

2 stops38h 48m

Chicago Midway

Sun 5/18

6:15 am-8:30 pm

2 stops24h 15m

$972

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

6:40 pm-11:01 pm

1 stop18h 21m

Lambert-St Louis

Tue 10/14

3:30 pm-2:10 pm

1 stop32h 40m

$991

BusanChicago

PUS - ORD

PUSORD

Busan Gimhae

Sun 5/11

3:45 pm-6:42 am

2 stops28h 57m

Chicago O'Hare Intl

Sun 5/18

8:37 am-8:05 am

2 stops33h 28m

$1,068

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 60 results
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Best time to book a flight from South Korea to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from South Korea 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 South Korea to Illinois

What is the cheapest month to book a flight from South Korea to Illinois?

Currently, August is the cheapest month in which you can book a flight from South Korea to Illinois (average of $245). Flying from South Korea 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 KR to IL?

Find hourly flight availability from South Korea 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 March 28, 2025.

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

Weekly flight availability from South Korea to Illinois

Explore weekly flight availability from South Korea 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 March 28, 2025.

The most flights from KR0 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 March 28, 2025.
Read through reviews of airlines operating flights from South Korea to Illinois, such as EVA Air, Korean Air and Japan Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,169 reviews

Entertainment

8.0

Comfort

8.3

Boarding

8.4

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
EVA Air
8.4
Very good
1,169 reviews
EVA Air
8.4
Very good
1,169 reviews

Entertainment

8.0

Comfort

8.3

Boarding

8.4

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Korean Air
8.4
Very good
1,050 reviews
EVA Air
8.4
Very good
1,169 reviews

Entertainment

8.0

Comfort

8.3

Boarding

8.4

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,169 reviews

Entertainment

8.0

Comfort

8.3

Boarding

8.4

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
ANA
8.3
Very good
829 reviews
EVA Air
8.4
Very good
1,169 reviews

Entertainment

8.0

Comfort

8.3

Boarding

8.4

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.
Asiana Airlines
8.2
Very good
440 reviews
EVA Air
8.4
Very good
1,169 reviews

Entertainment

8.0

Comfort

8.3

Boarding

8.4

Food

8.1

Overall

8.4

Crew

8.6

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

SFO - TPE

Inside plane was clean and chair was comfortable, but flight attendants serving coffee without giving me cream and sugar, even I ask he escape my request.

Related info for your journey

Find useful and relevant information for your journey from South Korea 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 South Korea to Illinois one-way?

    $447 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $473 and $521, respectively.

  • Can I find deals for flights from South Korea to Illinois that include hotel bookings?

    Yes. In addition to deals on South Korea to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from South Korea to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from South Korea to Illinois.

  • Can I find deals for business class flights from South Korea to Illinois?

    Yes. Cheapflights offers flight deals from South Korea 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 South Korea to Illinois?

    Currently, August is the cheapest month in which you can book a flight from South Korea to Illinois (average of $245). Flying from South Korea 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.

See more FAQs

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Alternative routes for South Korea to Illinois

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Top 5 airlines flying from South Korea to Illinois

Discover the top 5 airlines that operate flights from South Korea 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 March 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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