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Incheon Intl

$416+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ICN
Jun 20 — Jun 271
Fr 6/20
Fr 6/27
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 Juni 15, 2025.

Round-trip from

$853
(United Airlines)

One-way from

$418
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$1,592

Good round-trip deal

$823 or less

Good one-way deal

$449 or less
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. 5% potential increase in price ($87 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in June 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 Juni 15, 2025.

This United Airlines deal was found by Cheapflights users on 6/14. 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.
Mo 9/15:30 pmSTL - ICN
2 stops20h 50mUnited Airlines
Sa 9/2011:30 amICN - STL
2 stops23h 16mUnited Airlines
Deal found 6/14$853
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Sa 10/185:28 amSTL - ICN
1 stop20h 02mAmerican Airlines
Mo 10/276:50 pmICN - STL
1 stop33h 12mAmerican Airlines
Deal found 6/13$872
This Delta deal was found by Cheapflights users on 6/14. 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.
Sa 9/276:30 amSTL - ICN
1 stop20h 50mDelta
So 10/269:35 amICN - STL
1 stop17h 45mDelta
Deal found 6/14$961
This Air Canada deal was found by Cheapflights users on 6/14. 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.
Mo 9/14:00 pmSTL - ICN
2 stops34h 05mAir Canada
Di 9/305:45 pmICN - STL
2 stops35h 33mAir Canada
Deal found 6/14$998
This Expedia deal was found by Cheapflights users on 6/14. 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.
So 7/69:15 amSTL - ICN
2 stops40h 50mMultiple Airlines
So 7/2010:35 amICN - STL
2 stops24h 15mMultiple Airlines
Deal found 6/14$1,125
This Mytrip deal was found by Cheapflights users on 6/14. 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.
Sa 7/55:30 pmORD - ICN
2 stops32h 35mMultiple Airlines
So 7/2010:05 pmICN - ORD
2 stops30h 08mMultiple Airlines
Deal found 6/14$1,292
This FlightHub deal was found by Cheapflights users on 6/13. 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.
Sa 7/127:35 pmORD - ICN
1 stop30h 30mAir Canada
Fr 7/187:05 pmICN - ORD
1 stop28h 04mAir Canada
Deal found 6/13$1,302
This WestJet deal was found by Cheapflights users on 6/12. 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.
Sa 9/275:30 pmORD - ICN
1 stop35h 15mWestJet
Fr 10/108:45 pmICN - ORD
2 stops29h 54mWestJet
Deal found 6/12$1,310
This oojo deal was found by Cheapflights users on 6/13. 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.
So 10/512:30 amORD - ICN
1 stop20h 30mEVA Air
Di 11/117:45 pmICN - ORD
1 stop38h 50mEVA Air
Deal found 6/13$1,313
This Alaska Airlines deal was found by Cheapflights users on 6/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 10/153:20 pmORD - ICN
1 stop37h 15mAlaska Airlines
Sa 11/18:35 pmICN - ORD
2 stops23h 25mAlaska Airlines
Deal found 6/12$1,324
This FlightHub deal was found by Cheapflights users on 6/14. 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.
Mo 7/711:45 pmORD - ICN
1 stop27h 55mTurkish Airlines
Mo 7/1410:20 amICN - ORD
1 stop37h 20mTurkish Airlines
Deal found 6/14$1,367
This Ovago deal was found by Cheapflights users on 6/13. 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.
Mo 6/234:00 pmORD - ICN
1 stop32h 05mCathay Pacific
Mi 7/163:10 pmICN - ORD
1 stop37h 15mCathay Pacific
Deal found 6/13$1,402

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 Juni 15, 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

Mo 9/1

5:30 pm-4:20 am

2 stops20h 50m

Incheon Intl

Sa 9/20

11:30 am-8:46 pm

2 stops23h 16m

$853

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mo 9/1

7:01 am-3:30 pm

1 stop18h 29m

Incheon Intl

Di 9/30

5:25 pm-9:26 am

2 stops30h 01m

$934

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mo 9/1

4:00 pm-4:05 pm

2 stops34h 05m

Incheon Intl

Di 9/30

5:45 pm-3:18 pm

2 stops35h 33m

$998

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

So 7/6

9:15 am-4:05 pm

2 stops40h 50m

Incheon Intl

So 7/20

10:35 am-8:50 pm

2 stops24h 15m

$1,125

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mo 7/28

7:45 am-3:20 pm

1 stop17h 35m

Incheon Intl

Mo 8/4

6:50 pm-11:53 pm

1 stop19h 03m

$1,229

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sa 7/5

5:30 pm-4:05 pm

2 stops32h 35m

Incheon Intl

So 7/20

10:05 pm-2:13 pm

2 stops30h 08m

$1,292

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sa 7/12

7:35 pm-4:05 pm

1 stop30h 30m

Incheon Intl

Fr 7/18

7:05 pm-9:09 am

1 stop28h 04m

$1,302

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sa 9/27

5:30 pm-6:45 pm

1 stop35h 15m

Incheon Intl

Fr 10/10

8:45 pm-12:39 pm

2 stops29h 54m

$1,310

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

So 10/5

12:30 am-11:00 am

1 stop20h 30m

Incheon Intl

Di 11/11

7:45 pm-7:35 pm

1 stop38h 50m

$1,313

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Mi 10/15

3:20 pm-6:35 pm

1 stop37h 15m

Incheon Intl

Sa 11/1

8:35 pm-6:00 am

2 stops23h 25m

$1,324

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 48 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 $1,000). Flying from Illinois to Incheon Intl Airport in December is currently the most expensive (average of $1,635). 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 Juni 15, 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 Juni 15, 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 Juni 15, 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
1,204 reviews

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
EVA Air
8.4
Very good
1,204 reviews
EVA Air
8.4
Very good
1,204 reviews

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Korean Air
8.4
Very good
1,091 reviews
EVA Air
8.4
Very good
1,204 reviews

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
China Airlines
8.3
Very good
738 reviews
EVA Air
8.4
Very good
1,204 reviews

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Singapore Airlines
8.1
Very good
1,308 reviews
EVA Air
8.4
Very good
1,204 reviews

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount
Delta
8.0
Very good
7,961 reviews
EVA Air
8.4
Very good
1,204 reviews

Entertainment

8.0

Food

8.1

Comfort

8.3

Boarding

8.4

Overall

8.4

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Dale,May 2025

TPE - SFO

Flight staff were very courteous and efficient. Aircraft (seats, lavatories, etc) kept clean and replenished. Food service was timed perfectly and was delicious and had right amount

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 American Airlines, which is currently one of the cheapest options available, starting at $418. WestJet flights start at $448 while deals on United Airlines start at $449 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 (78%), Korean Air (72%) or Atlas Air (23%) 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 $2,407, our data indicates the cheapest price to be $417. The most popular route (Chicago O'Hare Intl - Incheon Intl), is priced around $831.

  • 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 $1,000). Flying from Illinois to Incheon Intl Airport in December is currently the most expensive (average of $1,635). 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

Traveling to a place near Illinois?

Book flights to Illinois if you plan to visit one of these locations
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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.
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Dulles Intl to Gimpo Intl flights
Seattle to Gimpo Intl flights
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Las Vegas to Incheon Intl flights
Dallas/Fort Worth to Gimpo Intl flights
O'Hare Intl to Gimpo Intl flights
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Oakland to Incheon Intl flights
Love Field to Incheon Intl flights
Orlando to Incheon Intl flights
Portland to Incheon Intl flights
Minneapolis to Incheon Intl flights
Atlanta to Gimpo Intl flights
LaGuardia to Gimpo Intl flights
Philadelphia to Incheon Intl flights
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George Bush Intcntl to Incheon Intl flights
Boston to Gimpo Intl flights
Detroit to Incheon Intl flights
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Baltimore to Gimpo Intl flights
George Bush Intcntl to Gimpo Intl flights
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Denver to Incheon Intl flights

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 Juni 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$660Average$1,016FlexibilityNo cancel feeOn-time69%
Cathay PacificCheapest$805Average$937FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$848Average$1,064FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$891Average$1,319FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$895Average$1,029FlexibilityNo cancel feeOn-time71%
EVA AirCheapest$1,079Average$1,293FlexibilityNo cancel feeOn-time74%
FinnairCheapest$1,110Average$1,503FlexibilityNo cancel feeOn-time76%
Asiana AirlinesCheapest$1,271Average$1,405FlexibilityNo cancel feeOn-time76%
DeltaCheapest$1,271Average$1,873FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$1,514Average$1,848FlexibilityNo cancel feeOn-time81%

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