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Cheap flights from Seoul to Illinois from $462

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to Illinois departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seoul to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:50 pm - 6:34 am
ICN
-
ORD
29h 44m
2 stops
Multiple Airlines Logo
4:00 pm - 12:40 pm
ORD
-
ICN
30h 40m
1 stop
$1,157Multiple Airlines
Tue, May 26 - Tue, Aug 4
Qatar Airways Logo
1:20 am - 3:05 pm
ICN
-
ORD
27h 45m
1 stop
Qatar Airways Logo
7:20 pm - 10:30 am
ORD
-
ICN
25h 10m
1 stop
$1,225Qatar Airways
Mon, Jul 13 - Wed, Aug 5
ANA Logo
7:55 pm - 8:40 am
GMP
-
ORD
26h 45m
1 stop
ANA Logo
5:35 pm - 10:30 pm
ORD
-
GMP
38h 55m
1 stop
$1,263ANA
Tue, Oct 13 - Thu, Oct 29
ANA Logo
7:55 pm - 2:55 pm
GMP
-
ORD
33h 00m
1 stop
ANA Logo
5:45 pm - 10:20 pm
ORD
-
GMP
38h 35m
1 stop
$1,292ANA
Tue, May 26 - Tue, Aug 4
United Airlines Logo
5:15 pm - 10:14 am
ICN
-
MLI
30h 59m
2 stops
United Airlines Logo
2:26 pm - 4:40 am
MLI
-
ICN
24h 14m
2 stops
$1,629United Airlines
Sat, Oct 24 - Tue, Oct 27
United Airlines Logo
5:15 pm - 10:14 am
ICN
-
MLI
30h 59m
2 stops
United Airlines Logo
3:52 pm - 4:40 am
MLI
-
ICN
22h 48m
2 stops
$1,650United Airlines
Sat, Oct 24 - Tue, Oct 27
Japan Airlines Logo
7:15 pm - 11:59 pm
GMP
-
STL
42h 44m
2 stops
Japan Airlines Logo
8:36 am - 9:15 pm
STL
-
GMP
22h 39m
2 stops
$1,703Japan Airlines
Wed, Jul 1 - Wed, Aug 26
Delta Logo
7:40 pm - 8:38 am
ICN
-
MDW
26h 58m
1 stop
Delta Logo
5:59 pm - 5:20 pm
MDW
-
ICN
33h 21m
2 stops
$1,729Delta
Mon, Sep 14 - Sat, Sep 26
Delta Logo
7:00 pm - 8:42 am
ICN
-
MDW
27h 42m
2 stops
Delta Logo
5:59 pm - 5:20 pm
MDW
-
ICN
33h 21m
2 stops
$1,730Delta
Mon, Sep 14 - Sat, Sep 26
Japan Airlines Logo
8:00 am - 11:56 pm
GMP
-
STL
29h 56m
2 stops
Japan Airlines Logo
8:36 am - 9:15 pm
STL
-
GMP
22h 39m
2 stops
$1,811Japan Airlines
Tue, Jun 23 - Tue, Jul 14

ANA flights from Seoul to Illinois

Our best ANA deals on Seoul to Illinois flight tickets
ANA
Oct 13
GMP7:55 pmSeoul Gimpo Intl
26h 45m
1 stop
ORD8:40 amChicago O'Hare Intl
Oct 29
ORD5:35 pmChicago O'Hare Intl
38h 55m
1 stop
GMP10:30 pmSeoul Gimpo Intl
$1,263
ANA
May 26
GMP7:55 pmSeoul Gimpo Intl
33h 00m
1 stop
ORD2:55 pmChicago O'Hare Intl
Aug 4
ORD5:45 pmChicago O'Hare Intl
38h 35m
1 stop
GMP10:20 pmSeoul Gimpo Intl
$1,292
ANA
Oct 13
GMP7:55 pmSeoul Gimpo Intl
32h 17m
2 stops
ORD2:12 pmChicago O'Hare Intl
Oct 29
ORD5:35 pmChicago O'Hare Intl
38h 55m
1 stop
GMP10:30 pmSeoul Gimpo Intl
$1,300

Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets
Japan Airlines
Jul 1
GMP7:15 pmSeoul Gimpo Intl
42h 44m
2 stops
STL11:59 pmLambert-St Louis
Aug 26
STL8:36 amLambert-St Louis
22h 39m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,703
Japan Airlines
May 25
GMP7:15 pmSeoul Gimpo Intl
26h 30m
1 stop
ORD7:45 amChicago O'Hare Intl
Jun 5
ORD12:59 pmChicago O'Hare Intl
31h 41m
2 stops
GMP10:40 amSeoul Gimpo Intl
$1,770
Japan Airlines
Jun 23
GMP8:00 amSeoul Gimpo Intl
29h 56m
2 stops
STL11:56 pmLambert-St Louis
Jul 14
STL8:36 amLambert-St Louis
22h 39m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,811

momondo Fare Finder

 
Customize your flight search to find flights from Seoul to Illinois 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 May 8, 2026.
Use the filters below to find and compare flights from Seoul to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 5/26

2:50 pm-6:34 am

2 stops29h 44m

Chicago O'Hare Intl

Tue 8/4

4:00 pm-12:40 pm

1 stop30h 40m

$1,157

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 7/13

1:20 am-3:05 pm

1 stop27h 45m

Chicago O'Hare Intl

Wed 8/5

7:20 pm-10:30 am

1 stop25h 10m

$1,225

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Tue 10/13

7:55 pm-8:40 am

1 stop26h 45m

Chicago O'Hare Intl

Thu 10/29

5:35 pm-10:30 pm

1 stop38h 55m

$1,263

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Tue 5/26

7:55 pm-2:55 pm

1 stop33h 00m

Chicago O'Hare Intl

Tue 8/4

5:45 pm-10:20 pm

1 stop38h 35m

$1,292

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Sat 10/24

5:15 pm-10:14 am

2 stops30h 59m

Moline Quad-City

Tue 10/27

2:26 pm-4:40 am

2 stops24h 14m

$1,629

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Sat 10/24

5:15 pm-10:14 am

2 stops30h 59m

Moline Quad-City

Tue 10/27

3:52 pm-4:40 am

2 stops22h 48m

$1,650

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Wed 7/1

7:15 pm-11:59 pm

2 stops42h 44m

Lambert-St Louis

Wed 8/26

8:36 am-9:15 pm

2 stops22h 39m

$1,703

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Mon 9/14

7:40 pm-8:38 am

1 stop26h 58m

Chicago Midway

Sat 9/26

5:59 pm-5:20 pm

2 stops33h 21m

$1,729

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Mon 9/14

7:00 pm-8:42 am

2 stops27h 42m

Chicago Midway

Sat 9/26

5:59 pm-5:20 pm

2 stops33h 21m

$1,730
Quickest round-trip

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Tue 6/23

8:00 am-11:56 pm

2 stops29h 56m

Lambert-St Louis

Tue 7/14

8:36 am-9:15 pm

2 stops22h 39m

$1,811

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 Illinois from

How to get the cheapest flight ticket from Seoul to Illinois

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 Illinois?

The cheapest month to fly to Illinois from Seoul is in August. Flight prices, which tend to average around $117, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of August, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $169.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Seoul to Illinois is on a Wednesday when prices can be found for as low as $1,288. Flights from Seoul to Illinois on a Tuesday will generally be more expensive and average around $1,618. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Seoul to Illinois flight route?

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

How far in advance should I book a flight from Seoul to Illinois?

You are more likely to see cheaper flights to Illinois from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,225 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Seoul for as low as $838 on momondo.

Can stopping save me money on Seoul to Illinois flights?

No. A direct flight is the cheapest option for a flight between Seoul to Illinois.

Cheap Seoul to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seoul to Illinois

Fastest flight time

12h 50m

Direct flights

Every day

Airports in Illinois

98 airports
The fastest flight from Seoul to Illinois takes 12h 50m
Direct flights go from Seoul to Illinois every day.
There are 98 airports in Illinois. From Seoul there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

Frequently asked questions about flying from Seoul to Illinois

  • When did momondo last update prices for flights from Seoul to Illinois?

    Prices for flights from Seoul to Illinois were last updated today.

  • How many operators does momondo search for flights from Seoul to Illinois?

  • How old do you have to be to fly from Seoul to Illinois?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seoul to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seoul to Illinois?

Best airlines flying from Seoul to Illinois

Compare and see reviews for airlines that fly from Seoul to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $197Free CancellationRating
7.9
12,350 reviews
Search Alaska Airlines flights
DeltaPriceFrom $269Free CancellationRating
7.9
8,457 reviews
Search Delta flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
9,693 reviews
Search United Airlines flights
Korean AirPriceFrom $857Free CancellationRating
8.4
1,217 reviews
Search Korean Air flights

Why use momondo?

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

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 Seoul to Illinois for you.

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

All flight searches from Seoul to Illinois on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Seoul to Illinois 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 Seoul to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seoul to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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