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$382+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$518
(Mytrip)

One-way from

$382
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$1,295

Good round-trip deal

$1,208 or less

Good one-way deal

$3,248 or less
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. 12% potential increase in price ($179 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Mytrip deal was found by Cheapflights users on 7/30. 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.
Wed 9/246:00 pmICN - ORD
1 stop29h 51mAir Canada
Wed 6/103:40 pmORD - ICN
1 stop34h 35mAir Canada
Deal found 7/30$518
This Trip.com deal was found by Cheapflights users on 7/29. 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.
Fri 9/126:00 pmICN - STL
1 stop39h 57mAir Canada
Fri 9/194:05 pmSTL - ICN
2 stops34h 10mAir Canada
Deal found 7/29$571
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 11/1812:45 pmICN - STL
1 stop18h 42mUnited Airlines
Sun 11/235:29 pmSTL - ICN
1 stop31h 46mUnited Airlines
Deal found 7/30$647
This American Airlines deal was found by Cheapflights users on 7/29. 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 9/125:25 pmICN - STL
1 stop19h 02mAmerican Airlines
Fri 9/195:18 amSTL - ICN
1 stop20h 12mAmerican Airlines
Deal found 7/29$654
This Trip.com deal was found by Cheapflights users on 7/30. 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.
Sat 9/138:35 pmICN - ORD
1 stop17h 28mHawaiian Airlines
Sat 9/208:00 amORD - ICN
1 stop20h 35mHawaiian Airlines
Deal found 7/30$672
This Trip.com deal was found by Cheapflights users on 7/30. 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.
Sat 9/138:35 pmICN - ORD
1 stop17h 28mMultiple Airlines
Sat 9/2012:05 pmORD - ICN
2 stops40h 55mMultiple Airlines
Deal found 7/30$687
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 9/136:40 pmICN - STL
1 stop34h 04mDelta
Sat 9/205:30 pmSTL - ICN
1 stop31h 50mDelta
Deal found 7/30$688
This Korean Air deal was found by Cheapflights users on 7/30. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/136:40 pmICN - STL
1 stop18h 22mKorean Air
Tue 10/218:53 amSTL - ICN
1 stop18h 27mKorean Air
Deal found 7/30$701
This lastminute.com deal was found by Cheapflights users on 7/30. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:55 amGMP - ORD
1 stop15h 10mJapan Airlines
Tue 9/231:05 amORD - GMP
1 stop30h 45mJapan Airlines
Deal found 7/30$775
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/256:20 pmICN - STL
1 stop19h 39mMultiple Airlines
Sat 10/183:57 pmSTL - ICN
1 stop35h 58mMultiple Airlines
Deal found 7/29$777
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:35 pmICN - STL
1 stop33h 43mHawaiian Airlines
Sat 11/224:08 pmSTL - ICN
1 stop35h 27mHawaiian Airlines
Deal found 7/28$938
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/127:55 amGMP - ORD
2 stops19h 49mMultiple Airlines
Mon 9/228:25 amORD - GMP
2 stops23h 25mMultiple Airlines
Deal found 7/30$964

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 July 30, 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

Wed 9/24

6:00 pm-9:51 am

1 stop29h 51m

Chicago O'Hare Intl

Wed 6/10

3:40 pm-4:15 pm

1 stop34h 35m

$518

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 9/12

6:00 pm-7:57 pm

1 stop39h 57m

Lambert-St Louis

Fri 9/19

4:05 pm-4:15 pm

2 stops34h 10m

$571

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 11/18

12:45 pm-4:27 pm

1 stop18h 42m

Lambert-St Louis

Sun 11/23

5:29 pm-4:15 pm

1 stop31h 46m

$647

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 9/12

5:25 pm-10:27 pm

1 stop19h 02m

Lambert-St Louis

Fri 9/19

5:18 am-3:30 pm

1 stop20h 12m

$654

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Sat 9/13

8:35 pm-12:03 am

1 stop17h 28m

Chicago O'Hare Intl

Sat 9/20

8:00 am-6:35 pm

1 stop20h 35m

$672

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Sat 9/13

8:35 pm-12:03 am

1 stop17h 28m

Chicago O'Hare Intl

Sat 9/20

12:05 pm-7:00 pm

2 stops40h 55m

$687

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 9/13

6:40 pm-2:44 pm

1 stop34h 04m

Lambert-St Louis

Sat 9/20

5:30 pm-3:20 pm

1 stop31h 50m

$688

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 10/13

6:40 pm-11:02 pm

1 stop18h 22m

Lambert-St Louis

Tue 10/21

8:53 am-5:20 pm

1 stop18h 27m

$701

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Thu 9/11

7:55 am-9:05 am

1 stop15h 10m

Chicago O'Hare Intl

Tue 9/23

1:05 am-9:50 pm

1 stop30h 45m

$775

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 9/25

6:20 pm-11:59 pm

1 stop19h 39m

Lambert-St Louis

Sat 10/18

3:57 pm-5:55 pm

1 stop35h 58m

$777

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 44 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 $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 July 30, 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 July 30, 2025.

The most flights from KR0 to USIL are scheduled on a Monday (2 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (1 on average).

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 July 30, 2025.
Get a feel of what it's like to fly with EVA Air, Korean Air, and ANA from South Korea to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,222 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Entertainment

8.0

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
1,222 reviews
EVA Air
8.4
Very good
1,222 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Entertainment

8.0

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
1,121 reviews
EVA Air
8.4
Very good
1,222 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Entertainment

8.0

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
ANA
8.4
Very good
922 reviews
EVA Air
8.4
Very good
1,222 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Entertainment

8.0

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
Japan Airlines
8.3
Very good
1,536 reviews
EVA Air
8.4
Very good
1,222 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Entertainment

8.0

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
China Airlines
8.3
Very good
754 reviews
EVA Air
8.4
Very good
1,222 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

Crew

8.6

Overall

8.4

Entertainment

8.0

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 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?

    $439 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Japan Airlines, with prices starting from $452 and $581, 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 6 airlines flying from South Korea to Illinois

Discover the top 6 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$229Average$1,376FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$558Average$1,137FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$730Average$1,053FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$778Average$1,024FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$857Average$1,331FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$959Average$1,590FlexibilityNo cancel feeOn-time69%

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