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Cheap flights from Illinois to Seoul from $487

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 11/24. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:55 am - 10:05 pmSTL-GMP
24h 10m2 stops
Multiple Airlines Logo
12:05 pm - 11:57 pmGMP-STL
26h 52m2 stops
$930Multiple Airlines
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Sun, Dec 7 - Sun, Dec 14
EVA Air Logo
12:30 am - 6:10 pmORD-GMP
27h 40m1 stop
EVA Air Logo
8:20 pm - 9:00 pmGMP-ORD
38h 40m1 stop
$965EVA Air
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Sun, Mar 29 - Wed, Apr 29
Japan Airlines Logo
6:55 am - 10:05 pmSTL-GMP
24h 10m2 stops
Japan Airlines Logo
8:00 am - 11:57 pmGMP-STL
30h 57m2 stops
$980Japan Airlines
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Sun, Dec 7 - Sun, Dec 14
EVA Air Logo
12:30 am - 6:10 pmORD-GMP
27h 40m1 stop
EVA Air Logo
1:50 pm - 9:00 pmGMP-ORD
21h 10m1 stop
$1,003EVA Air
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Sun, Mar 29 - Fri, May 1
Japan Airlines Logo
6:30 am - 10:05 pmSTL-GMP
24h 35m2 stops
Japan Airlines Logo
12:05 pm - 11:48 pmGMP-STL
26h 43m2 stops
$1,171Japan Airlines
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Mon, Feb 23 - Sat, Feb 28
Japan Airlines Logo
6:30 am - 10:05 pmSTL-GMP
24h 35m2 stops
Japan Airlines Logo
8:00 am - 11:48 pmGMP-STL
30h 48m2 stops
$1,188Japan Airlines
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Fri, Feb 27 - Wed, Mar 4
Air China Logo
4:00 pm - 1:05 pmORD-GMP
31h 05m2 stops
Air China Logo
8:35 am - 5:01 amGMP-ORD
34h 26m2 stops
$1,509Air China
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Fri, Mar 27 - Sun, Apr 5
Air China Logo
1:17 pm - 1:05 pmORD-GMP
33h 48m2 stops
Air China Logo
2:25 pm - 5:05 amGMP-ORD
28h 40m2 stops
$1,557Air China
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Mon, Apr 6 - Fri, Apr 10
ANA Logo
8:04 pm - 11:05 amORD-GMP
25h 01m2 stops
ANA Logo
7:55 pm - 8:40 amGMP-ORD
26h 45m1 stop
$1,627ANA
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Mon, Mar 30 - Tue, Apr 21
ANA Logo
4:25 pm - 11:20 amORD-GMP
27h 55m1 stop
ANA Logo
7:50 pm - 2:20 pmGMP-ORD
33h 30m2 stops
$1,632ANA
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Thu, Feb 12 - Tue, Mar 3

EVA Air flights from Illinois to Seoul Gimpo Intl Airport

Our best EVA Air deals on Illinois to Seoul Gimpo Intl Airport flight tickets
EVA Air
Mar 29
ORD12:30 amChicago O'Hare Intl
27h 40m
1 stop
GMP6:10 pmSeoul Gimpo Intl
Apr 29
GMP8:20 pmSeoul Gimpo Intl
38h 40m
1 stop
ORD9:00 pmChicago O'Hare Intl
$965
Find similar
EVA Air
Mar 29
ORD12:30 amChicago O'Hare Intl
27h 40m
1 stop
GMP6:10 pmSeoul Gimpo Intl
May 1
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
ORD9:00 pmChicago O'Hare Intl
$1,003
Find similar
EVA Air
Apr 16
ORD12:30 amChicago O'Hare Intl
22h 20m
1 stop
GMP12:50 pmSeoul Gimpo Intl
Apr 24
GMP1:50 pmSeoul Gimpo Intl
21h 10m
1 stop
ORD9:00 pmChicago O'Hare Intl
$1,040
Find similar

Japan Airlines flights from Illinois to Seoul Gimpo Intl Airport

Our best Japan Airlines deals on Illinois to Seoul Gimpo Intl Airport flight tickets
Japan Airlines
Dec 7
STL6:55 amLambert-St Louis
24h 10m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Dec 14
GMP8:00 amSeoul Gimpo Intl
30h 57m
2 stops
STL11:57 pmLambert-St Louis
$980
Find similar
Japan Airlines
Feb 23
STL6:30 amLambert-St Louis
24h 35m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Feb 28
GMP12:05 pmSeoul Gimpo Intl
26h 43m
2 stops
STL11:48 pmLambert-St Louis
$1,171
Find similar
Japan Airlines
Feb 27
STL6:30 amLambert-St Louis
24h 35m
2 stops
GMP10:05 pmSeoul Gimpo Intl
Mar 4
GMP8:00 amSeoul Gimpo Intl
30h 48m
2 stops
STL11:48 pmLambert-St Louis
$1,188
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momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Seoul Gimpo 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 November 10, 2025.
Use the filters below to find and compare flights from Illinois to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 12/7

6:55 am-10:05 pm

2 stops24h 10m

Seoul Gimpo Intl

Sun 12/14

12:05 pm-11:57 pm

2 stops26h 52m

$930

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Sun 3/29

12:30 am-6:10 pm

1 stop27h 40m

Seoul Gimpo Intl

Wed 4/29

8:20 pm-9:00 pm

1 stop38h 40m

$965

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 12/7

6:55 am-10:05 pm

2 stops24h 10m

Seoul Gimpo Intl

Sun 12/14

8:00 am-11:57 pm

2 stops30h 57m

$980

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Sun 3/29

12:30 am-6:10 pm

1 stop27h 40m

Seoul Gimpo Intl

Fri 5/1

1:50 pm-9:00 pm

1 stop21h 10m

$1,003

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 2/23

6:30 am-10:05 pm

2 stops24h 35m

Seoul Gimpo Intl

Sat 2/28

12:05 pm-11:48 pm

2 stops26h 43m

$1,171

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Fri 2/27

6:30 am-10:05 pm

2 stops24h 35m

Seoul Gimpo Intl

Wed 3/4

8:00 am-11:48 pm

2 stops30h 48m

$1,188

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Fri 3/27

4:00 pm-1:05 pm

2 stops31h 05m

Seoul Gimpo Intl

Sun 4/5

8:35 am-5:01 am

2 stops34h 26m

$1,509

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 4/6

1:17 pm-1:05 pm

2 stops33h 48m

Seoul Gimpo Intl

Fri 4/10

2:25 pm-5:05 am

2 stops28h 40m

$1,557

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 3/30

8:04 pm-11:05 am

2 stops25h 01m

Seoul Gimpo Intl

Tue 4/21

7:55 pm-8:40 am

1 stop26h 45m

$1,627

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Thu 2/12

4:25 pm-11:20 am

1 stop27h 55m

Seoul Gimpo Intl

Tue 3/3

7:50 pm-2:20 pm

2 stops33h 30m

$1,632

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Illinois to Seoul Gimpo 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 day to depart on your flight to Seoul Gimpo Intl Airport?

On average, the least expensive day to fly to Seoul Gimpo Intl Airport from Illinois is on a Monday. momondo users have found tickets for Monday departures for as low as $1,111. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Seoul Gimpo Intl Airport is Saturday, with ticket prices averaging around $2,662.

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

According to our data, the cheapest time of day to fly to Seoul Gimpo Intl Airport is in the evening. momondo users have found flights departing from Illinois to Seoul Gimpo Intl Airport in the evening for as low as $1,185. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seoul Gimpo Intl Airport is in the morning when prices are around $2,120.

Cheap Illinois to Seoul Gimpo Intl Airport flight deals and tips

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

Direct flights

None
There are no direct flights from Illinois to Seoul Gimpo Intl Airport. There are no popular flight routes from Illinois to Seoul Gimpo Intl Airport.
Search flight deals

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

    Prices for flights from Illinois to Seoul Gimpo Intl Airport are updated daily.

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

    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 Illinois to Seoul Gimpo Intl Airport.

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

    The required travel and health documents for your Seoul Gimpo Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seoul Gimpo Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Seoul. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Seoul from Illinois with this policy.

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

momondo provides multiple filters to help you find the best flight to Seoul from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Seoul, momondo offers a useful price alert feature which will track prices for flights to Seoul from Illinois and alert you when they change.

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