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$329+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEL — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$635
(United Airlines)

One-way from

$330
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$1,223

Good round-trip deal

$1,289 or less

Good one-way deal

$912 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 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 ($314 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/15. 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.
Sun 4/273:45 pmICN - ORD
1 stop37h 25mUnited Airlines
Tue 4/2912:45 pmORD - ICN
1 stop36h 15mUnited Airlines
Deal found 4/15$635
This Expedia deal was found by Cheapflights users on 4/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:50 pmICN - ORD
1 stop34h 49mAir Canada
Mon 11/103:40 pmORD - ICN
1 stop34h 25mAir Canada
Deal found 4/17$685
This Mytrip deal was found by Cheapflights users on 4/16. 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 11/198:10 pmICN - STL
1 stop34h 16mAir Canada
Sat 11/224:15 pmSTL - ICN
2 stops57h 50mAir Canada
Deal found 4/16$747
This Trip.com deal was found by Cheapflights users on 4/17. 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 5/254:00 pmICN - MDW
2 stops35h 38mMultiple Airlines
Sun 6/18:41 pmMDW - ICN
2 stops30h 39mMultiple Airlines
Deal found 4/17$752
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/107:20 pmICN - ORD
1 stop16h 39mMultiple Airlines
Thu 8/78:00 amORD - ICN
1 stop18h 30mMultiple Airlines
Deal found 4/16$756
This KAYAK deal was found by Cheapflights users on 4/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/116:20 pmICN - STL
1 stop19h 39mMultiple Airlines
Thu 5/156:22 pmSTL - ICN
1 stop33h 33mMultiple Airlines
Deal found 4/16$1,070
This American Airlines deal was found by Cheapflights users on 4/17. 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 02mAmerican Airlines
Tue 10/145:28 amSTL - ICN
1 stop20h 02mAmerican Airlines
Deal found 4/17$1,077
This KAYAK deal was found by Cheapflights users on 4/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1812:40 pmGMP - ORD
1 stop34h 00mANA
Thu 10/165:45 pmORD - GMP
1 stop38h 35mANA
Deal found 4/16$1,091
This Mytrip deal was found by Cheapflights users on 4/16. 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 5/228:55 pmICN - STL
1 stop22h 08mAsiana Airlines
Fri 6/207:10 pmSTL - ICN
1 stop19h 20mAsiana Airlines
Deal found 4/16$1,101
This United Airlines deal was found by Cheapflights users on 4/16. 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 6/1611:30 amICN - STL
2 stops23h 18mUnited Airlines
Thu 6/265:41 pmSTL - ICN
1 stop20h 39mUnited Airlines
Deal found 4/16$1,106
This Gotogate deal was found by Cheapflights users on 4/17. 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.
Sat 10/111:50 pmGMP - ORD
1 stop20h 55mEVA Air
Thu 10/1612:30 amORD - GMP
1 stop22h 20mEVA Air
Deal found 4/17$1,118
This Delta deal was found by Cheapflights users on 4/15. 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.
Tue 12/237:30 pmICN - MDW
1 stop30h 29mDelta
Mon 1/126:45 pmMDW - ICN
1 stop29h 45mDelta
Deal found 4/15$1,190

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 April 17, 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

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Sun 4/27

3:45 pm-3:10 pm

1 stop37h 25m

Chicago O'Hare Intl

Tue 4/29

12:45 pm-3:00 pm

1 stop36h 15m

$635

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 5/7

5:45 pm-2:43 pm

1 stop34h 58m

Chicago O'Hare Intl

Wed 5/14

3:35 pm-4:05 pm

1 stop34h 30m

$709

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Sun 5/25

4:00 pm-1:38 pm

2 stops35h 38m

Chicago Midway

Sun 6/1

8:41 pm-5:20 pm

2 stops30h 39m

$752

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Sat 5/10

7:20 pm-9:59 pm

1 stop16h 39m

Chicago O'Hare Intl

Thu 8/7

8:00 am-4:30 pm

1 stop18h 30m

$756

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 5/11

5:45 pm-7:58 pm

2 stops40h 13m

Lambert-St Louis

Thu 5/15

1:30 pm-4:05 pm

2 stops36h 35m

$902

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 5/11

6:20 pm-11:59 pm

1 stop19h 39m

Lambert-St Louis

Thu 5/15

6:22 pm-5:55 pm

1 stop33h 33m

$1,070

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

5:25 pm-10:27 pm

1 stop19h 02m

Lambert-St Louis

Tue 10/14

5:28 am-3:30 pm

1 stop20h 02m

$1,077

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Thu 9/18

12:40 pm-8:40 am

1 stop34h 00m

Chicago O'Hare Intl

Thu 10/16

5:45 pm-10:20 pm

1 stop38h 35m

$1,091

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 5/22

8:55 pm-5:03 am

1 stop22h 08m

Lambert-St Louis

Fri 6/20

7:10 pm-4:30 am

1 stop19h 20m

$1,101

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/16

11:30 am-8:48 pm

2 stops23h 18m

Lambert-St Louis

Thu 6/26

5:41 pm-4:20 am

1 stop20h 39m

$1,106

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 54 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 April 17, 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 April 17, 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 April 17, 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
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Overall

8.4

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
1,177 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Overall

8.4

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
1,064 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Overall

8.4

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
1,447 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Overall

8.4

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
845 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Overall

8.4

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
438 reviews
EVA Air
8.4
Very good
1,177 reviews

Entertainment

8.0

Boarding

8.4

Comfort

8.3

Food

8.1

Crew

8.6

Overall

8.4

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 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?

    $534 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 WestJet and EVA Air, with prices starting from $576 and $634, 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 $912. On average you can expect to pay $1,380. The most popular route, (Incheon Intl - Chicago O'Hare Intl), can usually be booked for $653.

  • 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.

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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$697Average$976FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$730Average$1,062FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$1,047Average$1,268FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$1,119Average$1,590FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$1,186Average$1,414FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,269Average$1,485FlexibilityNo cancel feeOn-timeN/A

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