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Incheon Intl

$423+ Cheap flights from Illinois to Incheon Intl (ICN)

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ICN
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
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Cheap flight deals from Illinois to Incheon Intl

Keep the following information in mind while searching for Illinois to Incheon Intl flight deals. Data was last updated April 22, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$993
(United Airlines)

One-way from

$436
(Mytrip)

Popular in

December

Cheapest in

January

Average price

$1,331

Good round-trip deal

$897 or less

Good one-way deal

$525 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 Incheon Intl
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One-way flight from Illinois to Incheon Intl
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Highest demand for flights based on searches. 6% potential increase in price ($97 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($58 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 Illinois to Incheon Intl.
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Price to beat on a one-way flight from Illinois to Incheon Intl.
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Find flight deals from Illinois to Incheon Intl

Cheapest flights from Illinois to Incheon Intl
Explore the most affordable flight options available from Illinois to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2025.

This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/101:27 pmSTL - ICN
2 stops25h 13mUnited Airlines
Thu 11/2712:45 pmICN - STL
1 stop19h 18mUnited Airlines
Deal found 4/21$992
This Booking.com deal was found by Cheapflights users on 4/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/712:30 amORD - ICN
1 stop20h 30mMultiple Airlines
Thu 9/118:45 pmICN - ORD
2 stops53h 54mMultiple Airlines
Deal found 4/22$1,148
This FlightHub deal was found by Cheapflights users on 4/21. 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 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
Thu 9/1812:00 pmICN - ORD
1 stop22h 45mEVA Air
Deal found 4/21$1,154
This Cathay Pacific deal was found by Cheapflights users on 4/21. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/44:00 pmORD - ICN
1 stop37h 05mCathay Pacific
Tue 7/228:05 pmICN - ORD
1 stop32h 20mCathay Pacific
Deal found 4/21$1,162
This Mytrip deal was found by Cheapflights users on 4/22. 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 5/11:30 pmSTL - ICN
2 stops36h 35mMultiple Airlines
Thu 5/221:30 pmICN - STL
3 stops35h 55mMultiple Airlines
Deal found 4/22$1,164
This FlightHub deal was found by Cheapflights users on 4/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:50 pmORD - ICN
1 stop31h 50mTurkish Airlines
Fri 10/3110:45 amICN - ORD
1 stop38h 25mTurkish Airlines
Deal found 4/21$1,182
This oojo deal was found by Cheapflights users on 4/22. 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.
Mon 4/2812:00 pmSTL - ICN
2 stops34h 40mCathay Pacific
Wed 5/213:10 pmICN - STL
2 stops45h 35mCathay Pacific
Deal found 4/22$1,233
This Booking.com deal was found by Cheapflights users on 4/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/11:30 pmSTL - ICN
2 stops60h 35mAir Canada
Mon 10/67:05 pmICN - STL
2 stops38h 52mAir Canada
Deal found 4/22$1,261
This Gurufare deal was found by Cheapflights users on 4/22. 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.
Tue 5/61:33 pmORD - ICN
2 stops31h 47mFinnair
Sat 5/249:50 pmICN - ORD
2 stops45h 20mFinnair
Deal found 4/22$1,273
This Delta deal was found by Cheapflights users on 4/22. 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.
Thu 4/245:34 pmSTL - ICN
1 stop33h 46mDelta
Sat 5/316:40 pmICN - STL
1 stop18h 46mDelta
Deal found 4/22$1,281
This Jetabroad deal was found by Cheapflights users on 4/20. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/19:20 amMDW - ICN
2 stops19h 25mWestJet
Fri 10/108:45 pmICN - MDW
2 stops27h 06mWestJet
Deal found 4/20$1,370
This CheapTickets deal was found by Cheapflights users on 4/22. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/16:25 amMDW - ICN
2 stops24h 05mMultiple Airlines
Wed 6/46:20 pmICN - MDW
2 stops33h 09mMultiple Airlines
Deal found 4/22$1,391

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Incheon Intl 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 22, 2025.
Use the filters below to find and compare flights from Illinois to Incheon Intl Airport that are best for you.

Fly from

Illinois

Fly to

Incheon Intl

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

5:49 pm-4:20 am

1 stop20h 31m

Incheon Intl

Sat 9/20

11:30 am-4:53 pm

1 stop19h 23m

$993

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 9/7

12:30 am-11:00 am

1 stop20h 30m

Incheon Intl

Thu 9/11

8:45 pm-12:39 pm

2 stops53h 54m

$1,148

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 9/7

12:30 am-11:00 am

1 stop20h 30m

Incheon Intl

Thu 9/18

12:00 pm-8:45 pm

1 stop22h 45m

$1,154

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Fri 7/4

4:00 pm-7:05 pm

1 stop37h 05m

Incheon Intl

Tue 7/22

8:05 pm-2:25 pm

1 stop32h 20m

$1,162

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 10/5

7:50 pm-5:40 pm

1 stop31h 50m

Incheon Intl

Fri 10/31

10:45 am-11:10 am

1 stop38h 25m

$1,182

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 10/1

6:30 am-6:35 pm

1 stop22h 05m

Incheon Intl

Mon 10/6

7:05 pm-3:18 pm

1 stop34h 13m

$1,215

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 10/1

1:30 pm-4:05 pm

2 stops60h 35m

Incheon Intl

Mon 10/6

7:05 pm-7:57 pm

2 stops38h 52m

$1,261

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 5/6

1:33 pm-11:20 am

2 stops31h 47m

Incheon Intl

Sat 5/24

9:50 pm-5:10 am

2 stops45h 20m

$1,273

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 9/9

1:55 pm-6:45 pm

2 stops38h 50m

Incheon Intl

Sun 9/21

8:45 pm-4:43 pm

1 stop33h 58m

$1,309

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 10/19

5:10 pm-9:30 am

2 stops26h 20m

Incheon Intl

Sat 11/1

1:25 pm-9:00 pm

1 stop45h 35m

$1,316

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/20

Showing 1-10 of 47 results
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Best time to book a flight from Illinois to Incheon Intl

Have a flexible travel schedule? Discover the best time to fly to Incheon Intl 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 Incheon Intl Airport

What is the cheapest month to book a flight from Illinois to Incheon Intl Airport?

Currently, February is the cheapest month in which you can book a flight from Illinois to Incheon Intl Airport (average of $1,001). Flying from Illinois to Incheon Intl Airport in June is currently the most expensive (average of $1,650). 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 ICN?

Find hourly flight availability from Illinois to Incheon Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 22, 2025.

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

Weekly flight availability from Illinois to Incheon Intl Airport

Explore weekly flight availability from Illinois to Incheon Intl. 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 22, 2025.

The most flights from USIL to ICN 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 Incheon Intl by month

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

In terms of precipitation, rainfall in Incheon Intl Airport ranges from 0.8 - 10.2 inches per month. July is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit Incheon Intl Airport when rainfall is around 0.8 in.

Temperature in Incheon Intl by month

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

If weather is an important factor for your trip to Incheon Intl Airport, 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 28.4 F).

Reviews of airlines servicing Incheon Intl

Get insights into the airlines that provide service to Incheon Intl. 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 Incheon Intl. Reviews last updated April 22, 2025.
To help decide which airline to fly from Illinois to Seoul, see what other customers have to say about EVA Air, Korean Air and China Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,179 reviews

Crew

8.6

Boarding

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

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
1,179 reviews
EVA Air
8.4
Very good
1,179 reviews

Crew

8.6

Boarding

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

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
1,062 reviews
EVA Air
8.4
Very good
1,179 reviews

Crew

8.6

Boarding

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

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.
China Airlines
8.3
Very good
727 reviews
EVA Air
8.4
Very good
1,179 reviews

Crew

8.6

Boarding

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

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.
Delta
8.0
Very good
7,920 reviews
EVA Air
8.4
Very good
1,179 reviews

Crew

8.6

Boarding

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

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.
KLM
7.8
Good
1,331 reviews
EVA Air
8.4
Very good
1,179 reviews

Crew

8.6

Boarding

8.4

Entertainment

8.0

Comfort

8.3

Food

8.1

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 Illinois to Incheon Intl. 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 Incheon Intl Airport one-way?

    To fly one-way, consider booking your trip with Cathay Pacific, which is currently one of the cheapest options available, starting at $436. United Airlines flights start at $568 while deals on WestJet start at $609 one-way.

  • What are the most popular routes from Illinois to Incheon Intl Airport?

    The most popular route from Illinois to Incheon Intl Airport is Chicago O'Hare Intl - Incheon Intl. You may also consider Chicago Midway - Incheon Intl or Lambert-St Louis - Incheon Intl.

  • What are the most reliable airlines from Illinois to Incheon Intl Airport?

    Consider Delta (86%), Korean Air (76%) or Atlas Air (11%) when booking your flight. These represent the most reliable airlines when flying from Illinois to Incheon Intl Airport.

  • What are the cheapest flights from Illinois to Incheon Intl Airport?

    Looking for the cheapest flight from Illinois to Incheon Intl Airport? While on average our users pay $2,026, our data indicates the cheapest price to be $447. The most popular route (Chicago O'Hare Intl - Incheon Intl), is priced around $750.

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

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

  • How can I find direct flights from Illinois to Incheon Intl?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Incheon Intl 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 Incheon Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Illinois to Incheon Intl Airport (average of $1,001). Flying from Illinois to Incheon Intl Airport in June is currently the most expensive (average of $1,650). 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 Incheon Intl

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Incheon Intl flights
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Dulles Intl to Gimpo Intl flights
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Burbank to Incheon Intl flights
Honolulu to Incheon Intl flights
Philadelphia to Incheon Intl flights
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Orlando to Incheon Intl flights
Dallas/Fort Worth to Gimpo Intl flights
O'Hare Intl to Gimpo Intl flights
Reagan-National to Gimpo Intl flights
George Bush Intcntl to Incheon Intl flights
Love Field to Incheon Intl flights
Santa Ana to Incheon Intl flights
Midway to Incheon Intl flights
Baltimore to Gimpo Intl flights
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LaGuardia to Gimpo Intl flights
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Top 10 airlines flying from Illinois to Incheon Intl

Discover the top 10 airlines that operate flights from Illinois to Incheon Intl. 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 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$660Average$1,025FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$848Average$1,048FlexibilityNo cancel feeOn-time77%
Cathay PacificCheapest$873Average$942FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$891Average$1,316FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$895Average$1,031FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,059Average$1,242FlexibilityNo cancel feeOn-time74%
FinnairCheapest$1,110Average$1,503FlexibilityNo cancel feeOn-time76%
DeltaCheapest$1,156Average$1,832FlexibilityNo cancel feeOn-timeN/A
Asiana AirlinesCheapest$1,271Average$1,880FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$1,524Average$1,806FlexibilityNo cancel feeOn-time81%

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