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Cheap flights from Illinois to Seoul from $312

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Seoul departing on 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Cathay Pacific Logo
4:00 pm - 7:05 pmORD-ICN
37h 05m1 stop
Cathay Pacific Logo
1:50 pm - 2:00 pmICN-ORD
38h 10m1 stop
$727Cathay Pacific
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Thu, Oct 16 - Mon, Oct 27
Cathay Pacific Logo
4:00 pm - 9:10 pmORD-ICN
39h 10m1 stop
Cathay Pacific Logo
8:05 pm - 2:25 pmICN-ORD
32h 20m1 stop
$729Cathay Pacific
Find Deal
Tue, Oct 14 - Sun, Oct 19
American Airlines Logo
7:41 pm - 3:30 pmSTL-ICN
29h 49m1 stop
American Airlines Logo
5:25 pm - 10:27 pmICN-STL
19h 02m1 stop
$848American Airlines
Find Deal
Mon, Sep 1 - Sat, Sep 20
American Airlines Logo
7:59 pm - 3:30 pmSTL-ICN
29h 31m2 stops
American Airlines Logo
5:25 pm - 8:05 amICN-STL
28h 40m2 stops
$851American Airlines
Find Deal
Mon, Sep 1 - Sat, Sep 20
United Airlines Logo
5:29 pm - 5:40 amSTL-ICN
21h 11m1 stop
United Airlines Logo
6:00 pm - 3:46 pmICN-STL
36h 46m2 stops
$855United Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 27
United Airlines Logo
5:49 pm - 4:20 amSTL-ICN
20h 31m1 stop
United Airlines Logo
11:30 am - 4:54 pmICN-STL
19h 24m1 stop
$856United Airlines
Find Deal
Mon, Sep 1 - Tue, Sep 30
Logo
1:40 pm - 6:45 pmORD-ICN
39h 05m2 stops
Logo
12:45 pm - 6:14 pmICN-ORD
19h 29m1 stop
$866
Find Deal
Sat, Sep 13 - Sat, Sep 20
Delta Logo
6:30 am - 3:30 pmSTL-ICN
18h 00m1 stop
Delta Logo
8:05 pm - 12:37 amICN-STL
19h 32m2 stops
$871Delta
Find Deal
Tue, Nov 25 - Wed, Dec 3
Delta Logo
1:30 pm - 5:45 amSTL-ICN
25h 15m1 stop
Delta Logo
7:30 pm - 11:02 pmICN-STL
18h 32m1 stop
$945Delta
Find Deal
Sun, Nov 23 - Mon, Dec 1
Logo
1:30 pm - 4:05 pmSTL-ICN
36h 35m2 stops
Logo
6:00 pm - 10:50 amICN-STL
30h 50m3 stops
$1,121
Find Deal
Thu, Sep 18 - Wed, Sep 24

Cathay Pacific flights from Illinois to Incheon Intl Airport

Our best Cathay Pacific deals on Illinois to Incheon Intl Airport flight tickets
Cathay Pacific
Oct 16
ORD4:00 pmChicago O'Hare Intl
37h 05m
1 stop
ICN7:05 pmIncheon Intl
Oct 27
ICN1:50 pmIncheon Intl
38h 10m
1 stop
ORD2:00 pmChicago O'Hare Intl
$727
Find similar
Cathay Pacific
Oct 14
ORD4:00 pmChicago O'Hare Intl
39h 10m
1 stop
ICN9:10 pmIncheon Intl
Oct 19
ICN8:05 pmIncheon Intl
32h 20m
1 stop
ORD2:25 pmChicago O'Hare Intl
$729
Find similar
Cathay Pacific
Sep 2
ORD4:00 pmChicago O'Hare Intl
32h 05m
1 stop
ICN2:05 pmIncheon Intl
Oct 14
ICN3:10 pmIncheon Intl
37h 15m
1 stop
ORD2:25 pmChicago O'Hare Intl
$743
Find similar

Korean Air flights from Illinois to Incheon Intl Airport

Our best Korean Air deals on Illinois to Incheon Intl Airport flight tickets
Korean Air
Sep 9
MDW9:30 amChicago Midway
16h 55m
1 stop
ICN4:25 pmIncheon Intl
Sep 16
ICN10:15 amIncheon Intl
16h 13m
1 stop
MDW12:28 pmChicago Midway
$1,780
Find similar
Korean Air
Aug 28
MDW9:15 amChicago Midway
18h 05m
1 stop
ICN5:20 pmIncheon Intl
Sep 10
ICN10:15 amIncheon Intl
16h 13m
1 stop
MDW12:28 pmChicago Midway
$1,783
Find similar
Korean Air
Aug 25
MDW9:15 amChicago Midway
18h 05m
1 stop
ICN5:20 pmIncheon Intl
Sep 4
ICN10:15 amIncheon Intl
16h 13m
1 stop
MDW12:28 pmChicago Midway
$1,785
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momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Incheon Intl Airport 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Illinois to Incheon Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 10/16

4:00 pm-7:05 pm

1 stop37h 05m

Incheon Intl

Mon 10/27

1:50 pm-2:00 pm

1 stop38h 10m

$727

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 10/14

4:00 pm-9:10 pm

1 stop39h 10m

Incheon Intl

Sun 10/19

8:05 pm-2:25 pm

1 stop32h 20m

$729

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

7:41 pm-3:30 pm

1 stop29h 49m

Incheon Intl

Sat 9/20

5:25 pm-10:27 pm

1 stop19h 02m

$848

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

7:59 pm-3:30 pm

2 stops29h 31m

Incheon Intl

Sat 9/20

5:25 pm-8:05 am

2 stops28h 40m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

5:29 pm-5:40 am

1 stop21h 11m

Incheon Intl

Thu 11/27

6:00 pm-3:46 pm

2 stops36h 46m

$855

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

5:49 pm-4:20 am

1 stop20h 31m

Incheon Intl

Tue 9/30

11:30 am-4:54 pm

1 stop19h 24m

$856

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sat 9/13

1:40 pm-6:45 pm

2 stops39h 05m

Incheon Intl

Sat 9/20

12:45 pm-6:14 pm

1 stop19h 29m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 11/25

6:30 am-3:30 pm

1 stop18h 00m

Incheon Intl

Wed 12/3

8:05 pm-12:37 am

2 stops19h 32m

$871

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 11/23

1:30 pm-5:45 am

1 stop25h 15m

Incheon Intl

Mon 12/1

7:30 pm-11:02 pm

1 stop18h 32m

$945

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/18

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 9/24

6:00 pm-10:50 am

3 stops30h 50m

$1,121

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seoul from

How to get the cheapest flight ticket from Illinois to Incheon Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from Illinois is in August. Flight prices, which tend to average around $1,001, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of August, then departing from Illinois during the month October is also very affordable. Most momondo users find prices during this month for around $1,266.

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from Illinois to Incheon Intl Airport is on a Monday when prices can be found for as low as $1,067. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,394. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

At noon is the cheapest time of day to fly from Illinois to Incheon Intl Airport when you can find flight prices for as low as $920. Flying to Incheon Intl Airport at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,466 on average. Flights to Incheon Intl Airport from Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Incheon Intl flight route?

Fly from Chicago O'Hare Intl to Incheon Intl for the best Illinois - Incheon Intl flight prices

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,542 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Illinois for as low as $1,302 on momondo.

What cabin class options are available on Illinois to Incheon Intl flights?

There are 4 cabin classes available to choose from on Illinois to Incheon Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Incheon Intl Airport flights?

You could potentially save up to 5% on your flight if you consider stops on a Illinois to Incheon Intl Airport flight.

Cheap Illinois to Incheon Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Incheon Intl Airport

Best Price Found

$312

Fastest flight time

16h 50m

Direct flights

Every day
The best one-way flight to Incheon Intl Airport from Illinois in the past 72 hours is $312. The best round-trip flight deal from Illinois to Incheon Intl Airport found on momondo in the last 72 hours is $727.
The fastest flight from Illinois to Incheon Intl Airport takes 16h 50m
Direct flights go from Illinois to Incheon Intl Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Incheon Intl Airport?

    Prices for flights from Illinois to Incheon Intl Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to Incheon Intl Airport?

  • How old do you have to be to fly from Illinois to Incheon Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Incheon Intl Airport.

  • What documentation or ID do you need to fly to Incheon Intl Airport?

    The travel and health documents required for your trip to Incheon Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Incheon Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Illinois to Incheon Intl Airport?

Best airlines flying from Illinois to Incheon Intl Airport

Compare and see reviews for airlines that fly from Illinois to Incheon Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $660Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Cathay PacificPriceFrom $805Free CancellationRating
7.6
949 reviews
Search Cathay Pacific flights
Turkish AirlinesPriceFrom $848Free CancellationRating
7.3
3,933 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $891Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
American AirlinesPriceFrom $895Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
EVA AirPriceFrom $1,080Free CancellationRating
8.4
1,220 reviews
Search EVA Air flights
DeltaPriceFrom $1,097Free CancellationRating
8.0
7,981 reviews
Search Delta flights
FinnairPriceFrom $1,110Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
Asiana AirlinesPriceFrom $1,271Free CancellationRating
8.2
468 reviews
Search Asiana Airlines flights
Korean AirPriceFrom $1,505Free CancellationRating
8.4
1,121 reviews
Search Korean Air flights

Traveling to a place near Seoul?

Book flights to Seoul if you plan to visit one of these locations
Suwon
Seongnam
Daejeon
Anyang

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Seoul?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Seoul for you.

Can I find flights from Illinois to Seoul with flexible booking policies on momondo?

Yes. All flights to Seoul from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Illinois to Seoul?

Once all potential Illinois to Seoul flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Illinois to Seoul right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Seoul now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seoul and let you know when they change.

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