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Cheap flights from Illinois to Seoul from $568

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 10/20. 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

Japan Airlines Logo
6:00 am - 6:20 pmSTL-GMP
45h 20m2 stops
Japan Airlines Logo
8:00 am - 11:42 pmGMP-STL
30h 42m2 stops
$1,008Japan Airlines
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Wed, Nov 5 - Wed, Nov 12
EVA Air Logo
12:30 am - 7:15 pmORD-GMP
28h 45m1 stop
EVA Air Logo
7:00 pm - 7:35 pmGMP-ORD
39h 35m1 stop
$1,088EVA Air
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Mon, Oct 20 - Tue, Nov 11
EVA Air Logo
12:30 am - 7:15 pmORD-GMP
28h 45m1 stop
EVA Air Logo
7:00 pm - 7:35 pmGMP-ORD
39h 35m1 stop
$1,094EVA Air
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Mon, Oct 27 - Tue, Nov 11
EVA Air Logo
10:00 am - 12:50 pmORD-GMP
36h 50m2 stops
EVA Air Logo
1:50 pm - 7:35 pmGMP-ORD
20h 45m1 stop
$1,126EVA Air
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Thu, Oct 30 - Sat, Nov 8
EVA Air Logo
5:53 pm - 12:50 pmORD-GMP
28h 57m2 stops
EVA Air Logo
1:50 pm - 7:35 pmGMP-ORD
20h 45m1 stop
$1,128EVA Air
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Thu, Oct 30 - Fri, Nov 7
Air China Logo
7:10 am - 1:05 pmORD-GMP
38h 55m2 stops
Air China Logo
2:25 pm - 11:10 pmGMP-ORD
47h 45m2 stops
$1,324Air China
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Wed, Nov 12 - Tue, Nov 25
Air China Logo
7:10 am - 1:05 pmORD-GMP
38h 55m2 stops
Air China Logo
2:25 pm - 1:10 pmGMP-ORD
37h 45m2 stops
$1,349Air China
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Wed, Nov 12 - Thu, Nov 27
Air China Logo
10:42 am - 1:05 pmORD-GMP
35h 23m2 stops
Air China Logo
2:25 pm - 11:10 pmGMP-ORD
47h 45m2 stops
$1,363Air China
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Mon, Nov 10 - Tue, Nov 25
ANA Logo
5:45 pm - 11:05 amORD-GMP
27h 20m1 stop
ANA Logo
7:50 pm - 8:20 amGMP-ORD
26h 30m1 stop
$1,603ANA
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Wed, Oct 22 - Wed, Oct 29
ANA Logo
7:10 am - 11:20 amORD-GMP
37h 10m2 stops
ANA Logo
7:50 pm - 7:20 amGMP-ORD
26h 30m1 stop
$1,611ANA
Find Deal
Mon, Nov 17 - Tue, Nov 25

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
Nov 5
STL6:00 amLambert-St Louis
45h 20m
2 stops
GMP6:20 pmSeoul Gimpo Intl
Nov 12
GMP8:00 amSeoul Gimpo Intl
30h 42m
2 stops
STL11:42 pmLambert-St Louis
$1,008
Find similar
Japan Airlines
Sep 25
STL6:20 amLambert-St Louis
25h 30m
2 stops
GMP9:50 pmSeoul Gimpo Intl
Oct 11
GMP12:05 pmSeoul Gimpo Intl
25h 58m
2 stops
STL12:03 amLambert-St Louis
$1,145
Find similar
Japan Airlines
Oct 20
STL8:42 amLambert-St Louis
47h 08m
2 stops
GMP9:50 pmSeoul Gimpo Intl
Oct 25
GMP7:55 amSeoul Gimpo Intl
29h 10m
2 stops
STL11:05 pmLambert-St Louis
$1,505
Find similar

Air China flights from Illinois to Seoul Gimpo Intl Airport

Our best Air China deals on Illinois to Seoul Gimpo Intl Airport flight tickets
Air China
Nov 12
ORD7:10 amChicago O'Hare Intl
38h 55m
2 stops
GMP1:05 pmSeoul Gimpo Intl
Nov 25
GMP2:25 pmSeoul Gimpo Intl
47h 45m
2 stops
ORD11:10 pmChicago O'Hare Intl
$1,324
Find similar
Air China
Nov 12
ORD7:10 amChicago O'Hare Intl
38h 55m
2 stops
GMP1:05 pmSeoul Gimpo Intl
Nov 27
GMP2:25 pmSeoul Gimpo Intl
37h 45m
2 stops
ORD1:10 pmChicago O'Hare Intl
$1,349
Find similar
Air China
Nov 10
ORD10:42 amChicago O'Hare Intl
35h 23m
2 stops
GMP1:05 pmSeoul Gimpo Intl
Nov 25
GMP2:25 pmSeoul Gimpo Intl
47h 45m
2 stops
ORD11:10 pmChicago O'Hare Intl
$1,363
Find similar

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 September 23, 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

Wed 11/5

6:00 am-6:20 pm

2 stops45h 20m

Seoul Gimpo Intl

Wed 11/12

8:00 am-11:42 pm

2 stops30h 42m

$1,008

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 10/20

12:30 am-7:15 pm

1 stop28h 45m

Seoul Gimpo Intl

Tue 11/11

7:00 pm-7:35 pm

1 stop39h 35m

$1,088

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 10/27

12:30 am-7:15 pm

1 stop28h 45m

Seoul Gimpo Intl

Tue 11/11

7:00 pm-7:35 pm

1 stop39h 35m

$1,094

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Thu 10/30

10:00 am-12:50 pm

2 stops36h 50m

Seoul Gimpo Intl

Sat 11/8

1:50 pm-7:35 pm

1 stop20h 45m

$1,126

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Thu 10/30

5:53 pm-12:50 pm

2 stops28h 57m

Seoul Gimpo Intl

Fri 11/7

1:50 pm-7:35 pm

1 stop20h 45m

$1,128

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Wed 11/12

7:10 am-1:05 pm

2 stops38h 55m

Seoul Gimpo Intl

Tue 11/25

2:25 pm-11:10 pm

2 stops47h 45m

$1,324

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Wed 11/12

7:10 am-1:05 pm

2 stops38h 55m

Seoul Gimpo Intl

Thu 11/27

2:25 pm-1:10 pm

2 stops37h 45m

$1,349

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 11/10

10:42 am-1:05 pm

2 stops35h 23m

Seoul Gimpo Intl

Tue 11/25

2:25 pm-11:10 pm

2 stops47h 45m

$1,363

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Wed 10/22

5:45 pm-11:05 am

1 stop27h 20m

Seoul Gimpo Intl

Wed 10/29

7:50 pm-8:20 am

1 stop26h 30m

$1,603

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 11/17

7:10 am-11:20 am

2 stops37h 10m

Seoul Gimpo Intl

Tue 11/25

7:50 pm-7:20 am

1 stop26h 30m

$1,611

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 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.
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  • 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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