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$458+ Cheap flights from Seoul (SEL) 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.
SEL — ORD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Seoul to Illinois

Keep the following information in mind while searching for Seoul to Illinois flight deals. Data was last updated June 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 Seoul (SEL) to Illinois
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One-way flight from Seoul (SEL) 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 Seoul (SEL) to Illinois.
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Price to beat on a one-way flight from Seoul (SEL) to Illinois.
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Find flight deals from Seoul to Illinois

Cheapest flights from Seoul to Illinois
Explore the most affordable flight options available from Seoul to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 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.
Mon 12/1512:45 pmICN - STL
1 stop20h 08mUnited Airlines
Fri 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.
Mon 10/138:35 pmICN - ORD
1 stop23h 46mMultiple Airlines
Thu 11/136:00 amORD - ICN
1 stop21h 35mMultiple Airlines
Deal found 6/10$757
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.
Thu 9/187:55 amGMP - ORD
1 stop15h 10mJapan Airlines
Wed 10/151:05 amORD - GMP
1 stop19h 40mJapan Airlines
Deal found 6/12$813
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.
Mon 9/155:25 pmICN - STL
1 stop19h 25mAmerican Airlines
Tue 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.
Fri 10/108:35 pmICN - ORD
1 stop17h 24mAlaska Airlines
Sat 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.
Fri 10/315:50 pmICN - ORD
1 stop34h 49mAir Canada
Sun 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.
Tue 8/198:55 pmICN - STL
1 stop33h 58mMultiple Airlines
Sun 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.
Tue 12/238:40 pmICN - ORD
1 stop37h 14mAsiana Airlines
Mon 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.
Wed 6/256:30 pmICN - ORD
1 stop34h 50mUnited Airlines
Sat 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.
Mon 11/176:50 pmICN - STL
2 stops35h 36mAir Canada
Thu 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.
Wed 9/2412:00 pmICN - ORD
1 stop22h 45mEVA Air
Sat 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.
Thu 7/38:55 pmICN - STL
1 stop21h 59mAsiana Airlines
Sat 7/266:00 amSTL - ICN
1 stop32h 00mAsiana Airlines
Deal found 6/12$973

Cheapflights Fare Finder

Customize your flight search to find flights from Seoul 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 June 12, 2025.
Use the filters below to find and compare flights from Seoul to Illinois that are best for you.

Fly from

Seoul

Fly to

Illinois

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

11:30 am-4:53 pm

1 stop19h 23m

Lambert-St Louis

Tue 10/14

5:47 pm-4:20 am

1 stop20h 33m

$751

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 10/13

8:35 pm-6:21 am

1 stop23h 46m

Chicago O'Hare Intl

Thu 11/13

6:00 am-6:35 pm

1 stop21h 35m

$757

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Thu 9/18

7:55 am-9:05 am

1 stop15h 10m

Chicago O'Hare Intl

Wed 10/15

1:05 am-10:45 am

1 stop19h 40m

$813

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

5:25 pm-10:50 pm

1 stop19h 25m

Lambert-St Louis

Tue 10/14

7:19 am-3:30 pm

1 stop18h 11m

$828

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 10/10

8:35 pm-11:59 pm

1 stop17h 24m

Chicago O'Hare Intl

Sat 10/18

6:00 am-6:35 pm

1 stop22h 35m

$832

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 10/31

5:50 pm-2:39 pm

1 stop34h 49m

Chicago O'Hare Intl

Sun 11/30

3:40 pm-5:05 pm

1 stop34h 25m

$841

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 8/19

8:55 pm-4:53 pm

1 stop33h 58m

Lambert-St Louis

Sun 11/16

5:29 pm-5:35 pm

2 stops33h 06m

$872

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 6/25

6:30 pm-3:20 pm

1 stop34h 50m

Chicago O'Hare Intl

Sat 6/28

6:20 pm-3:00 pm

1 stop30h 40m

$921

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 11/17

6:50 pm-3:26 pm

2 stops35h 36m

Lambert-St Louis

Thu 11/20

4:15 pm-5:05 pm

2 stops33h 50m

$927

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 9/10

2:40 pm-8:25 pm

1 stop19h 45m

Chicago O'Hare Intl

Tue 9/30

6:26 pm-4:20 am

1 stop19h 54m

$937

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 52 results
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Best time to book a flight from Seoul to Illinois

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

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

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

Find hourly flight availability from Seoul 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 June 12, 2025.

When flying from Seoul 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 Seoul to Illinois

Explore weekly flight availability from Seoul 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 June 12, 2025.

The most flights from SEL 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 June 12, 2025.
See what other customers who have flown with EVA Air, Korean Air and Japan Airlines from Seoul to Illinois have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

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

Food

8.1

Boarding

8.4

Comfort

8.3

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

Food

8.1

Boarding

8.4

Comfort

8.3

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
Japan Airlines
8.3
Very good
1,489 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

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
ANA
8.3
Very good
882 reviews
EVA Air
8.4
Very good
1,202 reviews

Food

8.1

Boarding

8.4

Comfort

8.3

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

Food

8.1

Boarding

8.4

Comfort

8.3

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 Seoul 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 Seoul to Illinois one-way?

    $549 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on EVA Air and Air Canada, with prices starting from $629 and $654, respectively.

  • What are the most popular routes from Seoul to Illinois?

    While some choose either Incheon Intl - Chicago Midway or Seoul Gimpo Intl - Chicago O'Hare Intl, Incheon Intl - Chicago O'Hare Intl is the most popular route from Seoul to Illinois.

  • What are the cheapest flights from Seoul to Illinois?

    The cheapest flight price from Seoul 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 Seoul to Illinois that include hotel bookings?

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

  • How can I find direct flights from Seoul to Illinois?

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

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

    Yes. Cheapflights offers flight deals from Seoul 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 Seoul to Illinois?

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

Discover the top 6 airlines that operate flights from Seoul 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 June 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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