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$433+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$659
(United Airlines)

One-way from

$433
(Kiwi.com)

Popular in

August

Cheapest in

October

Average price

$922

Good round-trip deal

$1,317 or less

Good one-way deal

$1,071 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 ($355 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/20. 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 2/2412:45 pmICN - ORD
2 stops37h 38mUnited Airlines
Wed 2/2610:55 amORD - ICN
2 stops51h 45mUnited Airlines
Deal found 2/20$583
This Mytrip deal was found by Cheapflights users on 2/20. 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 5/278:45 pmICN - ORD
1 stop33h 59mWestJet
Tue 6/105:30 pmORD - ICN
1 stop35h 15mWestJet
Deal found 2/20$836
This American Airlines deal was found by Cheapflights users on 2/19. 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 3/56:50 pmICN - ORD
1 stop20h 06mAmerican Airlines
Wed 3/125:00 amORD - ICN
1 stop20h 55mAmerican Airlines
Deal found 2/19$840
This United Airlines deal was found by Cheapflights users on 2/19. 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 3/312:45 pmICN - STL
1 stop21h 11mUnited Airlines
Thu 4/105:54 pmSTL - ICN
1 stop20h 26mUnited Airlines
Deal found 2/19$842
This Gotogate deal was found by Cheapflights users on 2/20. 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 4/155:45 pmICN - ORD
2 stops40h 15mAir Canada
Tue 4/292:05 pmORD - ICN
2 stops36h 00mAir Canada
Deal found 2/20$866
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 3/69:55 pmICN - ORD
1 stop24h 49mMultiple Airlines
Wed 3/125:22 pmORD - ICN
1 stop22h 18mMultiple Airlines
Deal found 2/19$873
This FlightHub deal was found by Cheapflights users on 2/19. 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.
Tue 3/257:50 amGMP - ORD
1 stop14h 45mJapan Airlines
Mon 9/291:05 amORD - GMP
1 stop19h 40mJapan Airlines
Deal found 2/19$897
This Justfly.com deal was found by Cheapflights users on 2/19. 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.
Thu 3/2012:25 pmGMP - ORD
1 stop33h 55mANA
Tue 11/114:25 pmORD - GMP
1 stop39h 05mANA
Deal found 2/19$934
This Gotogate deal was found by Cheapflights users on 2/19. 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.
Mon 5/57:05 pmICN - STL
1 stop31h 31mAir Canada
Fri 5/167:30 amSTL - ICN
1 stop20h 00mAir Canada
Deal found 2/19$954
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 9/186:40 pmICN - MDW
1 stop27h 56mDelta
Thu 10/169:20 amMDW - ICN
1 stop18h 00mDelta
Deal found 2/20$1,200
This Air Canada deal was found by Cheapflights users on 2/20. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/611:00 amPUS - ORD
2 stops23h 00mMultiple Airlines
Sun 4/133:45 pmORD - PUS
2 stops39h 00mMultiple Airlines
Deal found 2/20$1,218
This Booking.com deal was found by Cheapflights users on 2/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/610:40 amPUS - STL
2 stops42h 09mMultiple Airlines
Sun 4/133:30 pmSTL - PUS
2 stops39h 15mMultiple Airlines
Deal found 2/19$1,245

Find flights from South Korea to Illinois within your budget

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 February 20, 2025.

Fly from

South Korea

Fly to

Illinois

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 4/24

11:30 am-11:36 am

1 stop38h 06m

Chicago O'Hare Intl

Sat 4/26

7:25 am-3:00 pm

2 stops41h 35m

$659

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 5/27

8:45 pm-4:44 pm

1 stop33h 59m

Chicago O'Hare Intl

Tue 6/10

5:30 pm-6:45 pm

1 stop35h 15m

$836

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 3/5

6:50 pm-11:56 pm

1 stop20h 06m

Chicago O'Hare Intl

Wed 3/12

5:00 am-3:55 pm

1 stop20h 55m

$840

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 3/3

12:45 pm-10:06 pm

2 stops24h 21m

Lambert-St Louis

Thu 4/10

5:54 pm-4:20 am

1 stop20h 26m

$842

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 4/15

5:45 pm-8:00 pm

2 stops40h 15m

Chicago O'Hare Intl

Tue 4/29

2:05 pm-4:05 pm

2 stops36h 00m

$866

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 3/6

9:55 pm-7:44 am

1 stop24h 49m

Chicago O'Hare Intl

Wed 3/12

5:22 pm-5:40 am

1 stop22h 18m

$873

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Tue 3/25

7:50 am-8:35 am

1 stop14h 45m

Chicago O'Hare Intl

Mon 9/29

1:05 am-9:50 pm

1 stop30h 45m

$897

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Thu 3/20

12:25 pm-8:20 am

1 stop33h 55m

Chicago O'Hare Intl

Tue 11/11

4:25 pm-10:30 pm

1 stop39h 05m

$934

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 5/5

7:05 pm-12:36 pm

1 stop31h 31m

Lambert-St Louis

Fri 5/16

7:30 am-5:30 pm

1 stop20h 00m

$954

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Tue 3/18

7:30 pm-2:15 pm

1 stop32h 45m

Chicago Midway

Thu 3/27

9:25 am-4:30 pm

1 stop17h 05m

$1,215

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 50 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.

Travel insights for flights from South Korea to Illinois

Get recent, data-driven insights about flights from South Korea to Illinois including ideal travel times, pricing trends, and more.

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 $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 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 February 20, 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 February 20, 2025.

The most flights from KR0 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 February 20, 2025.
Read through reviews of airlines operating flights from South Korea to Illinois, such as EVA Air, ANA and Korean Air. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,200 reviews

Crew

8.6

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.0

Comfort

8.3

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

EVA Air
8.4
Very good
1,200 reviews
EVA Air
8.4
Very good
1,200 reviews

Crew

8.6

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.0

Comfort

8.3

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

ANA
8.4
Very good
842 reviews
EVA Air
8.4
Very good
1,200 reviews

Crew

8.6

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.0

Comfort

8.3

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Korean Air
8.4
Very good
1,037 reviews
EVA Air
8.4
Very good
1,200 reviews

Crew

8.6

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.0

Comfort

8.3

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Japan Airlines
8.3
Very good
1,440 reviews
EVA Air
8.4
Very good
1,200 reviews

Crew

8.6

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.0

Comfort

8.3

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

Delta
8.0
Very good
8,219 reviews
EVA Air
8.4
Very good
1,200 reviews

Crew

8.6

Overall

8.4

Boarding

8.4

Entertainment

8.0

Food

8.0

Comfort

8.3

Reviews

1 / 20

10.0
Excellent

Piotr,Feb 2025

TPE - ORD

It is always a pleasure to travel with EVA Air.

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?

    $435 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $512 and $560, 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 $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.

See more FAQs

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Alternative routes for South Korea to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$697Average$992FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$820Average$1,038FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,089Average$1,563FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$1,186Average$1,419FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,269Average$1,520FlexibilityNo cancel feeOn-timeN/A
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