HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$353+ 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seoul to Illinois with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seoul to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Seoul (SEL) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$567
(United Airlines)

One-way from

$353
(Kiwi.com)

Good round-trip deal

$1,189 or less

Good one-way deal

$1,085 or less
From Seoul (SEL) to Illinois
Search Deals
One-way flight from Seoul (SEL) to Illinois
Search Deals
Price to beat on a round-trip flight from Seoul (SEL) to Illinois.
Search Deals
Price to beat on a one-way flight from Seoul (SEL) to Illinois.
Search Deals

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 January 21, 2025.

This United Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 2/1812:45 pmICN - ORD
2 stops22h 10mUnited Airlines
Wed 2/191:05 pmORD - ICN
2 stops49h 35mUnited Airlines
Deal found 1/20$567
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/316:50 pmICN - ORD
1 stop28h 35mAmerican Airlines
Wed 2/128:50 pmORD - ICN
2 stops28h 55mAmerican Airlines
Deal found 1/20$748
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Tue 2/186:50 pmICN - STL
2 stops31h 31mAmerican Airlines
Tue 2/257:04 amSTL - ICN
1 stop18h 41mAmerican Airlines
Deal found 1/21$797
This Orbitz deal was found by Cheapflights users on 1/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2210:35 amICN - STL
2 stops23h 26mMultiple Airlines
Mon 6/29:15 amSTL - ICN
1 stop18h 15mMultiple Airlines
Deal found 1/20$798
This Gotogate deal was found by Cheapflights users on 1/20. 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.
Wed 2/127:50 amGMP - ORD
1 stop14h 45mJapan Airlines
Wed 2/1910:35 amORD - GMP
1 stop16h 45mJapan Airlines
Deal found 1/20$813
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 2/196:00 pmICN - STL
1 stop15h 56mUnited Airlines
Thu 2/209:00 amSTL - ICN
1 stop29h 40mUnited Airlines
Deal found 1/20$824
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/89:55 pmICN - ORD
1 stop26h 39mMultiple Airlines
Sat 3/16:32 pmORD - ICN
2 stops34h 58mMultiple Airlines
Deal found 1/20$836
This WhyPayMore deal was found by Cheapflights users on 1/20. 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 WhyPayMore is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/245:45 pmICN - ORD
1 stop32h 46mAir Canada
Wed 4/303:40 pmORD - ICN
1 stop34h 25mAir Canada
Deal found 1/20$859
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/247:50 pmGMP - ORD
2 stops32h 58mANA
Mon 9/295:45 pmORD - GMP
1 stop27h 20mANA
Deal found 1/20$918
This Trip.com deal was found by Cheapflights users on 1/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/124:50 pmICN - MDW
2 stops22h 27mMultiple Airlines
Wed 2/197:05 amMDW - ICN
2 stops31h 25mMultiple Airlines
Deal found 1/20$942
This Asiana Airlines deal was found by Cheapflights users on 1/20. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/32:40 pmICN - ORD
1 stop18h 15mAsiana Airlines
Wed 6/187:10 amORD - ICN
1 stop20h 25mAsiana Airlines
Deal found 1/20$950
This Air Canada deal was found by Cheapflights users on 1/20. 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.
Mon 5/195:45 pmICN - STL
2 stops35h 31mAir Canada
Mon 6/24:05 pmSTL - ICN
2 stops34h 00mAir Canada
Deal found 1/20$973

Find flights from Seoul to Illinois within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 2/18

12:45 pm-7:55 pm

2 stops22h 10m

Chicago O'Hare Intl

Wed 2/19

1:05 pm-5:40 am

2 stops49h 35m

$567

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 1/31

6:50 pm-8:25 am

1 stop28h 35m

Chicago O'Hare Intl

Wed 2/12

8:50 pm-4:45 pm

2 stops28h 55m

$748

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 2/18

6:50 pm-11:21 am

2 stops31h 31m

Lambert-St Louis

Tue 2/25

7:04 am-4:45 pm

1 stop18h 41m

$797

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 5/22

10:35 am-8:01 pm

2 stops23h 26m

Lambert-St Louis

Mon 6/2

9:15 am-5:30 pm

1 stop18h 15m

$798

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Wed 2/12

7:50 am-7:35 am

1 stop14h 45m

Chicago O'Hare Intl

Wed 2/19

10:35 am-6:20 pm

1 stop16h 45m

$813

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 2/19

6:00 pm-6:56 pm

1 stop15h 56m

Lambert-St Louis

Thu 2/20

9:00 am-5:40 am

1 stop29h 40m

$824

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 2/12

8:10 pm-11:16 am

2 stops30h 06m

Chicago O'Hare Intl

Wed 2/19

5:44 pm-6:25 pm

2 stops33h 41m

$830

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 4/24

5:45 pm-12:31 pm

1 stop32h 46m

Chicago O'Hare Intl

Wed 4/30

3:40 pm-4:05 pm

1 stop34h 25m

$859

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Mon 3/24

7:50 pm-2:48 pm

2 stops32h 58m

Chicago O'Hare Intl

Mon 9/29

5:45 pm-11:05 am

1 stop27h 20m

$918

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Wed 2/12

4:50 pm-12:17 am

2 stops22h 27m

Chicago Midway

Wed 2/19

7:05 am-5:30 am

2 stops31h 25m

$942

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 46 results
1
2
3
...
5

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.

Travel insights for flights from Seoul to Illinois

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

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 $320). 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 January 21, 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 January 21, 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 January 21, 2025.
See what other customers who have flown with United Airlines, American Airlines and Asiana 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.
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Entertainment

8.2

Overall

8.5

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Korean Air
8.5
Very good
1,039 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Entertainment

8.2

Overall

8.5

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

EVA Air
8.4
Very good
1,253 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Entertainment

8.2

Overall

8.5

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

ANA
8.4
Very good
852 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Entertainment

8.2

Overall

8.5

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Japan Airlines
8.3
Very good
1,449 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Entertainment

8.2

Overall

8.5

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

Asiana Airlines
8.3
Very good
466 reviews
Korean Air
8.5
Very good
1,039 reviews

Crew

8.7

Entertainment

8.2

Overall

8.5

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 10

Flight was short, so we did not get food, but that is expected. Only have entertainment a fair rating because no wifi is provided onboard. Good flight overall.

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?

    $498 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 United Airlines and WestJet, with prices starting from $507 and $547, 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 $1,025. On average you can expect to pay $1,214. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $744.

  • 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 $320). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seoul to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to John F Kennedy Intl flights
Incheon Intl to Los Angeles flights
Incheon Intl to Dallas/Fort Worth flights
Incheon Intl to Honolulu flights
Incheon Intl to San Francisco flights
Incheon Intl to LaGuardia flights
Incheon Intl to Newark flights
Incheon Intl to Dulles Intl flights
Incheon Intl to Ontario flights
Gimpo Intl to Los Angeles flights
Incheon Intl to Seattle flights
Gimpo Intl to John F Kennedy Intl flights
Incheon Intl to O'Hare Intl flights
Incheon Intl to Atlanta flights
Gimpo Intl to San Francisco flights
Incheon Intl to Baton Rouge flights
Incheon Intl to Boston flights
Incheon Intl to New Orleans flights
Incheon Intl to Las Vegas flights
Incheon Intl to Santa Ana flights
Gimpo Intl to Newark flights
Gimpo Intl to Honolulu flights
Incheon Intl to Love Field flights
Incheon Intl to Reagan-National flights
Incheon Intl to Hobby flights
Incheon Intl to Baltimore flights
Incheon Intl to Detroit flights
Incheon Intl to Midway flights
Gimpo Intl to O'Hare Intl flights
Incheon Intl to San Jose flights
Incheon Intl to Denver flights
Incheon Intl to Minneapolis flights
Busan to Los Angeles flights
Incheon Intl to George Bush Intcntl flights
Incheon Intl to Oakland flights
Incheon Intl to Nashville flights
Incheon Intl to Salt Lake City flights
Gimpo Intl to Boston flights
Incheon Intl to Columbus flights
Incheon Intl to Orlando flights
Busan to Honolulu flights
Busan to John F Kennedy Intl flights
Busan to Seattle flights
Busan to Newark flights

Top 4 airlines flying from Seoul to Illinois

Discover the top 4 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$697Average$992FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$1,089Average$1,481FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$1,186Average$1,436FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,269Average$1,532FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.