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$397+ Cheap flights from Illinois to Seoul (SEL)

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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEL
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Illinois to Seoul

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Seoul (SEL). 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

$799
(Air Canada)

One-way from

$397
(Kiwi.com)

Good round-trip deal

$1,073 or less

Good one-way deal

$518 or less
From Illinois to Seoul (SEL)
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One-way flight from Illinois to Seoul (SEL)
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Price to beat on a round-trip flight from Illinois to Seoul (SEL).
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Price to beat on a one-way flight from Illinois to Seoul (SEL).
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Find flight deals from Illinois to Seoul

Cheapest flights from Illinois to Seoul
Explore the most affordable flight options available from Illinois to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2025.

This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/151:30 pmSTL - ICN
1 stop36h 50mAir Canada
Mon 11/176:50 pmICN - STL
2 stops35h 36mAir Canada
Deal found 1/21$793
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 3/47:04 amSTL - ICN
1 stop18h 41mAmerican Airlines
Tue 3/115:50 pmICN - STL
1 stop18h 54mAmerican Airlines
Deal found 1/21$877
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/168:30 pmORD - ICN
1 stop30h 50mTurkish Airlines
Mon 2/2410:45 amICN - ORD
1 stop46h 50mTurkish Airlines
Deal found 1/20$938
This Cathay Pacific 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/42:40 pmORD - ICN
1 stop39h 35mCathay Pacific
Sun 5/1810:10 amICN - ORD
1 stop42h 15mCathay Pacific
Deal found 1/20$942
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.
Thu 3/611:55 amORD - ICN
2 stops41h 35mMultiple Airlines
Thu 3/131:20 pmICN - ORD
1 stop23h 46mMultiple Airlines
Deal found 1/20$944
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/710:48 amORD - GMP
2 stops35h 17mMultiple Airlines
Fri 3/142:25 pmGMP - ORD
2 stops28h 20mMultiple Airlines
Deal found 1/20$952
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.
Mon 2/176:40 amMDW - ICN
2 stops31h 50mMultiple Airlines
Mon 3/178:50 pmICN - MDW
2 stops22h 41mMultiple Airlines
Deal found 1/20$984
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.
Fri 2/75:00 amORD - ICN
1 stop20h 45mAmerican Airlines
Fri 2/216:50 pmICN - ORD
2 stops20h 03mAmerican Airlines
Deal found 1/21$1,032
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/712:30 amORD - ICN
1 stop20h 30mEVA Air
Wed 9/1712:00 pmICN - ORD
1 stop22h 45mEVA Air
Deal found 1/20$1,083
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/712:30 amORD - GMP
1 stop27h 40mEVA Air
Wed 9/178:20 pmGMP - ORD
1 stop38h 25mEVA Air
Deal found 1/20$1,083
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.
Wed 2/193:50 pmSTL - ICN
2 stops32h 25mMultiple Airlines
Wed 2/264:55 pmICN - STL
3 stops37h 45mMultiple Airlines
Deal found 1/20$1,111
This Ovago 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/189:00 amSTL - ICN
1 stop29h 30mAsiana Airlines
Tue 2/258:50 pmICN - STL
1 stop37h 06mAsiana Airlines
Deal found 1/20$1,269

Find flights from Illinois to Seoul within your budget

Customize your flight search to find flights from Illinois to Seoul 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

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 3/6

3:50 pm-3:15 pm

2 stops32h 25m

Incheon Intl

Thu 3/13

7:10 pm-3:06 pm

1 stop33h 56m

$799

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 3/4

7:04 am-4:45 pm

1 stop18h 41m

Incheon Intl

Tue 3/11

5:50 pm-10:44 pm

1 stop18h 54m

$877

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sat 4/26

7:50 pm-5:40 pm

1 stop31h 50m

Incheon Intl

Wed 5/21

11:20 pm-9:50 am

1 stop24h 30m

$940

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 4/24

4:05 pm-9:15 pm

1 stop39h 10m

Incheon Intl

Wed 5/21

8:15 pm-2:25 pm

1 stop32h 10m

$942

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 3/6

6:45 am-5:30 am

2 stops31h 45m

Incheon Intl

Wed 3/19

4:40 pm-12:44 am

2 stops22h 04m

$948

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Fri 3/7

10:48 am-1:05 pm

2 stops35h 17m

Seoul Gimpo Intl

Fri 3/14

2:25 pm-4:45 am

2 stops28h 20m

$952

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Fri 2/7

9:00 pm-4:30 pm

2 stops28h 30m

Incheon Intl

Sun 2/16

6:50 pm-11:53 pm

2 stops20h 03m

$982

ChicagoIncheon

MDW - ICN

MDWICN

Chicago Midway

Mon 2/17

6:40 am-5:30 am

2 stops31h 50m

Incheon Intl

Mon 3/17

8:50 pm-5:31 am

2 stops22h 41m

$984

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 2/19

3:50 pm-3:15 pm

2 stops32h 25m

Incheon Intl

Wed 2/26

4:55 pm-3:40 pm

3 stops37h 45m

$1,111

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 3/2

11:30 pm-6:45 pm

1 stop28h 15m

Incheon Intl

Tue 3/11

11:40 am-8:35 pm

1 stop22h 55m

$1,116

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Seoul

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

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

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Seoul (average of $1,086). Flying from Illinois to Seoul in June is currently the most expensive (average of $1,722). 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 IL to SEL?

Find hourly flight availability from Illinois to Seoul. 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.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Seoul as you normally would.

Weekly flight availability from Illinois to Seoul

Explore weekly flight availability from Illinois to Seoul. 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 USIL to SEL 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 Seoul by month

Plan your trip to Seoul by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seoul ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul when rainfall is around 1.1 in.

Temperature in Seoul by month

Plan your trip to Seoul by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seoul, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Seoul

Get insights into the airlines that provide service to Seoul. 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 Seoul. Reviews last updated January 21, 2025.
Read through reviews of airlines operating flights from Illinois to Seoul, such as Air Canada, American Airlines and Turkish Airlines. 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

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.5

Food

8.1

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

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.5

Food

8.1

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
1,255 reviews
Korean Air
8.5
Very good
1,039 reviews

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.5

Food

8.1

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

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.5

Food

8.1

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

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.5

Food

8.1

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

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.5

Food

8.1

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 Illinois to Seoul. 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 Illinois to Seoul one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $470. Users have also found prices from $509 and $582 on Turkish Airlines and Cathay Pacific, respectively.

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

    The most popular flight routes from Illinois to Seoul are Chicago O'Hare Intl - Incheon Intl, Chicago O'Hare Intl - Seoul Gimpo Intl and Chicago Midway - Incheon Intl.

  • What are the most reliable airlines from Illinois to Seoul?

    Before booking your flight to Seoul from Illinois, check out the most reliable airlines to get you to your destination on time: Delta (88%), Korean Air (47%), Atlas Air( 21%).

  • What are the cheapest flights from Illinois to Seoul?

    While on average a flight from Illinois to Seoul is generally $2,581, our data shows the cheapest flight currently is $453. When looking at the most popular route, (Chicago O'Hare Intl - Incheon Intl), you can expect to pay $811 for that flight.

  • Can I find deals for flights from Illinois to Seoul that include hotel bookings?

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Illinois to Seoul (average of $1,086). Flying from Illinois to Seoul in June is currently the most expensive (average of $1,722). 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 Illinois to Seoul

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Seoul

Discover the top 10 airlines that operate flights from Illinois to Seoul. 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
Turkish AirlinesCheapest$848Average$1,080FlexibilityNo cancel feeOn-time77%
Cathay PacificCheapest$875Average$1,119FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$892Average$1,349FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$895Average$1,241FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$906Average$1,231FlexibilityNo cancel feeOn-time69%
EVA AirCheapest$1,076Average$1,289FlexibilityNo cancel feeOn-time74%
FinnairCheapest$1,233Average$1,511FlexibilityNo cancel feeOn-time76%
Asiana AirlinesCheapest$1,280Average$1,646FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,536Average$1,850FlexibilityNo cancel feeOn-time81%
DeltaCheapest$1,591Average$1,832FlexibilityNo cancel feeOn-timeN/A
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