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$471+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEL
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
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Cheap flight deals from Illinois to Seoul

Keep the following information in mind while searching for Illinois to Seoul flight deals. Data was last updated March 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,083
(FlightHub)

One-way from

$475
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,186

Good round-trip deal

$947 or less

Good one-way deal

$537 or less
Provider with most accurate pricing for Chicago (CHI)-Seoul (SEL) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Seoul (SEL) flights.
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From Illinois to Seoul (SEL)
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One-way flight from Illinois to Seoul (SEL)
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Highest demand for flights based on searches. 4% potential increase in price ($69 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 March 31, 2025.

This FlightHub deal was found by Cheapflights users on 3/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2112:30 amORD - GMP
1 stop28h 45mEVA Air
Wed 5/78:20 pmGMP - ORD
1 stop38h 40mEVA Air
Deal found 3/30$1,083
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/209:38 pmORD - ICN
1 stop28h 07mMultiple Airlines
Wed 5/712:45 pmICN - ORD
2 stops23h 14mMultiple Airlines
Deal found 3/30$1,105
This Turkish Airlines deal was found by Cheapflights users on 3/30. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/111:25 amORD - ICN
1 stop31h 15mTurkish Airlines
Sun 5/1111:20 pmICN - ORD
1 stop24h 20mTurkish Airlines
Deal found 3/30$1,106
This oojo deal was found by Cheapflights users on 3/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1312:30 amORD - ICN
1 stop20h 30mEVA Air
Thu 5/812:00 pmICN - ORD
1 stop23h 00mEVA Air
Deal found 3/30$1,112
This Cathay Pacific deal was found by Cheapflights users on 3/29. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/304:00 pmORD - ICN
1 stop30h 40mCathay Pacific
Sun 5/1810:10 amICN - ORD
1 stop42h 15mCathay Pacific
Deal found 3/29$1,114
This WestJet deal was found by Cheapflights users on 3/30. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/265:30 pmORD - ICN
1 stop35h 15mWestJet
Tue 9/308:45 pmICN - ORD
1 stop33h 58mWestJet
Deal found 3/30$1,152
This Priceline deal was found by Cheapflights users on 3/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/251:30 pmSTL - ICN
2 stops36h 35mAir Canada
Thu 10/305:50 pmICN - STL
2 stops35h 36mAir Canada
Deal found 3/30$1,196
This LOT deal was found by Cheapflights users on 3/30. 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 LOT is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/29:55 pmORD - ICN
2 stops42h 45mLOT
Wed 11/129:20 amICN - ORD
1 stop25h 40mLOT
Deal found 3/30$1,274
This EVA Air deal was found by Cheapflights users on 3/31. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:36 pmSTL - ICN
2 stops25h 24mMultiple Airlines
Thu 10/3011:40 amICN - STL
2 stops40h 12mMultiple Airlines
Deal found 3/31$1,298
This Priceline deal was found by Cheapflights users on 3/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2112:30 amORD - GMP
1 stop28h 45mMultiple Airlines
Thu 5/87:20 pmGMP - ORD
1 stop27h 55mMultiple Airlines
Deal found 3/30$1,304
This Gurufare deal was found by Cheapflights users on 3/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2111:32 amSTL - ICN
2 stops41h 13mWestJet
Tue 5/278:45 pmICN - STL
2 stops26h 15mWestJet
Deal found 3/30$1,340
This Cheapflightsfares deal was found by Cheapflights users on 3/31. 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 9/89:20 amMDW - ICN
2 stops19h 25mWestJet
Mon 9/228:45 pmICN - MDW
2 stops27h 06mWestJet
Deal found 3/31$1,424

Cheapflights Fare Finder

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 March 31, 2025.
Use the filters below to find and compare flights from Illinois to Seoul that are best for you.

Fly from

Illinois

Fly to

Seoul

Route

Depart

Return

Price

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 4/21

12:30 am-7:15 pm

1 stop28h 45m

Seoul Gimpo Intl

Wed 5/7

8:20 pm-9:00 pm

1 stop38h 40m

$1,083

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 4/20

9:38 pm-3:45 pm

1 stop28h 07m

Incheon Intl

Wed 5/7

12:45 pm-9:59 pm

2 stops23h 14m

$1,105

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 5/1

11:25 am-8:40 am

1 stop31h 15m

Incheon Intl

Sun 5/11

11:20 pm-9:40 am

1 stop24h 20m

$1,106

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 4/13

12:30 am-11:00 am

1 stop20h 30m

Incheon Intl

Thu 5/8

12:00 pm-9:00 pm

1 stop23h 00m

$1,112

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Wed 4/30

4:00 pm-12:40 pm

1 stop30h 40m

Incheon Intl

Sun 5/18

10:10 am-2:25 pm

1 stop42h 15m

$1,114

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Wed 6/4

1:40 pm-6:45 pm

2 stops39h 05m

Incheon Intl

Mon 6/9

8:45 pm-4:44 pm

1 stop33h 59m

$1,185

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/25

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Thu 10/30

5:50 pm-3:26 pm

2 stops35h 36m

$1,196

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/25

7:36 pm-11:00 am

2 stops25h 24m

Incheon Intl

Thu 10/30

11:40 am-1:52 pm

2 stops40h 12m

$1,298

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 4/21

12:30 am-7:15 pm

1 stop28h 45m

Seoul Gimpo Intl

Thu 5/8

7:20 pm-9:15 am

1 stop27h 55m

$1,304

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 5/21

11:32 am-6:45 pm

2 stops41h 13m

Incheon Intl

Tue 5/27

8:45 pm-9:00 am

2 stops26h 15m

$1,340

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

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.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Seoul

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

Currently, February is the cheapest month in which you can book a flight from Illinois to Seoul (average of $1,002). Flying from Illinois to Seoul in June is currently the most expensive (average of $1,661). 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 March 31, 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 March 31, 2025.

The most flights from USIL to SEL are scheduled on a Monday (2 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 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 March 31, 2025.
Read through reviews of airlines operating flights from Illinois to Seoul, such as EVA Air, Korean Air and Japan Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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
1,170 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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
1,051 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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
1,440 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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
831 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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.
Delta
8.0
Very good
7,899 reviews
EVA Air
8.4
Very good
1,170 reviews

Food

8.1

Entertainment

8.0

Overall

8.4

Boarding

8.4

Comfort

8.3

Crew

8.6

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 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 Turkish Airlines. According to our data, you can fly for as low as $537. Users have also found prices from $553 and $582 on Cathay Pacific and Air Canada, 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 (87%), Korean Air (83%), Atlas Air( 14%).

  • What are the cheapest flights from Illinois to Seoul?

    While on average a flight from Illinois to Seoul is generally $2,901, our data shows the cheapest flight currently is $485. When looking at the most popular route, (Chicago O'Hare Intl - Incheon Intl), you can expect to pay $840 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, February is the cheapest month in which you can book a flight from Illinois to Seoul (average of $1,002). Flying from Illinois to Seoul in June is currently the most expensive (average of $1,661). 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 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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$803Average$1,025FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$848Average$1,051FlexibilityNo cancel feeOn-time77%
Cathay PacificCheapest$873Average$1,000FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$891Average$1,314FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$895Average$1,229FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,059Average$1,246FlexibilityNo cancel feeOn-time74%
FinnairCheapest$1,110Average$1,503FlexibilityNo cancel feeOn-time76%
DeltaCheapest$1,156Average$1,827FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$1,271Average$1,728FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,522Average$1,804FlexibilityNo cancel feeOn-time81%
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