How long does it take to fly to Seoul?

If you’re flying from a popular airport in Illinois, such as Chicago or Moline, and flying into Seoul, then you can expect flight times to average 15h 42m and 22h 36m, respectively.

How many flights depart from Illinois to Seoul on average per week?

As of April 2026, there are 14 flights per week flying from Illinois to Seoul. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

How many flights depart from Illinois to Seoul on average per day?

2 flights are operational daily from Illinois to Seoul as of April 2026. The most popular departure time for this route is 12:00PM, with 100% of flights per day taking off in the afternoon.

What airlines fly to Seoul?

Korean Air, EVA Air and Delta are the top three most popular airlines that fly to Seoul from Illinois according to our data. Korean Air is the first choice among our users, with 41% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 10 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Illinois to Seoul?

Cathay Pacific, Air Canada, and Delta are the most popular carriers operating from Illinois to Seoul

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

Prices for flights from Illinois to Seoul refresh daily.

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

As of April 2026, there are 10 operators available to choose from for flights from Illinois to Seoul.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Seoul.

What documentation or ID do you need to fly to Seoul?

The required travel and health documents for your Seoul 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$497 Cheap Flights from Illinois to Seoul in 2026

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Find the cheapest flights from Illinois to Seoul

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:00 pm - 12:25 am

ORD

ICN

42h 25m

1 stop

1:40 pm - 1:55 pm

ICN

ORD

38h 15m

1 stop

$1,003Cathay Pacific

Tue, Sep 8 - Thu, Sep 17

4:00 pm - 2:05 pm

ORD

ICN

32h 05m

1 stop

1:55 am - 1:55 pm

ICN

ORD

26h 00m

1 stop

$1,011Cathay Pacific

Mon, Sep 7 - Thu, Sep 17

4:00 pm - 5:30 am

ORD

ICN

23h 30m

1 stop

3:10 pm - 1:55 pm

ICN

ORD

36h 45m

1 stop

$1,019Cathay Pacific

Sun, Aug 30 - Tue, Sep 15

4:00 pm - 5:30 am

ORD

ICN

23h 30m

1 stop

3:10 pm - 2:20 pm

ICN

ORD

37h 10m

1 stop

$1,020Cathay Pacific

Thu, Aug 27 - Thu, Sep 10

8:55 am - 5:30 pm

STL

ICN

18h 35m

1 stop

7:05 pm - 8:00 pm

ICN

STL

38h 55m

1 stop

$1,029Air Canada

Tue, Sep 22 - Tue, Oct 6

7:05 am - 4:05 pm

STL

ICN

43h 00m

2 stops

6:00 pm - 8:25 pm

ICN

STL

40h 25m

1 stop

$1,154Air Canada

Wed, May 27 - Wed, Jun 10

12:30 am - 7:15 pm

ORD

GMP

28h 45m

1 stop

7:15 pm - 8:45 pm

GMP

ORD

39h 30m

1 stop

$1,233EVA Air

Mon, Aug 31 - Tue, Sep 15

7:00 am - 5:30 pm

STL

ICN

20h 30m

1 stop

7:35 pm - 11:59 pm

ICN

STL

18h 24m

1 stop

$1,266Alaska Airlines

Wed, Apr 29 - Sun, May 3

12:30 am - 12:50 pm

ORD

GMP

22h 20m

1 stop

8:20 pm - 8:45 pm

GMP

ORD

38h 25m

1 stop

$1,271EVA Air

Wed, Sep 2 - Wed, Sep 16

6:00 am - 5:20 pm

STL

ICN

21h 20m

2 stops

7:20 pm - 12:36 am

ICN

STL

19h 16m

1 stop

$1,271Delta

Sun, Aug 2 - Tue, Aug 25

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Delta flights from Illinois to Seoul

Our best Delta deals on Illinois to Seoul flight tickets

Delta

Apr 25

STL5:00 pmLambert-St Louis

21h 00m

1 stop

ICN4:00 amIncheon Intl

May 6

ICN10:15 amIncheon Intl

20h 27m

1 stop

STL4:42 pmLambert-St Louis

$1,266

Delta

Aug 2

STL6:00 amLambert-St Louis

21h 20m

2 stops

ICN5:20 pmIncheon Intl

Aug 25

ICN7:20 pmIncheon Intl

19h 16m

1 stop

STL12:36 amLambert-St Louis

$1,271

Delta

Aug 2

STL5:19 pmLambert-St Louis

20h 41m

1 stop

ICN4:00 amIncheon Intl

Aug 24

ICN7:20 pmIncheon Intl

19h 16m

1 stop

STL12:36 amLambert-St Louis

$1,339

United Airlines flights from Illinois to Seoul

Our best United Airlines deals on Illinois to Seoul flight tickets

United Airlines

Oct 6

ORD6:02 amChicago O'Hare Intl

18h 58m

1 stop

ICN3:00 pmIncheon Intl

Oct 27

ICN11:45 amIncheon Intl

21h 01m

2 stops

ORD6:46 pmChicago O'Hare Intl

$1,134

United Airlines

Apr 27

ORD4:40 pmChicago O'Hare Intl

21h 40m

1 stop

ICN4:20 amIncheon Intl

May 11

ICN4:50 pmIncheon Intl

22h 38m

1 stop

ORD1:28 amChicago O'Hare Intl

$1,137

United Airlines

Apr 29

ORD7:45 pmChicago O'Hare Intl

18h 35m

1 stop

ICN4:20 amIncheon Intl

May 7

ICN4:50 pmIncheon Intl

17h 49m

1 stop

ORD8:39 pmChicago O'Hare Intl

$1,141

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 9/8

4:00 pm-12:25 am

1 stop42h 25m

Incheon Intl

Thu 9/17

1:40 pm-1:55 pm

1 stop38h 15m

$1,003

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Mon 9/7

4:00 pm-2:05 pm

1 stop32h 05m

Incheon Intl

Thu 9/17

1:55 am-1:55 pm

1 stop26h 00m

$1,011

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 8/30

4:00 pm-5:30 am

1 stop23h 30m

Incheon Intl

Tue 9/15

3:10 pm-1:55 pm

1 stop36h 45m

$1,019

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 8/27

4:00 pm-5:30 am

1 stop23h 30m

Incheon Intl

Thu 9/10

3:10 pm-2:20 pm

1 stop37h 10m

$1,020

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/22

8:55 am-5:30 pm

1 stop18h 35m

Incheon Intl

Tue 10/6

7:05 pm-8:00 pm

1 stop38h 55m

$1,029

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 5/27

7:05 am-4:05 pm

2 stops43h 00m

Incheon Intl

Wed 6/10

6:00 pm-8:25 pm

1 stop40h 25m

$1,154

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 8/31

12:30 am-7:15 pm

1 stop28h 45m

Seoul Gimpo Intl

Tue 9/15

7:15 pm-8:45 pm

1 stop39h 30m

$1,233

Quickest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/29

7:00 am-5:30 pm

1 stop20h 30m

Incheon Intl

Sun 5/3

7:35 pm-11:59 pm

1 stop18h 24m

$1,266

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Wed 9/2

12:30 am-12:50 pm

1 stop22h 20m

Seoul Gimpo Intl

Wed 9/16

8:20 pm-8:45 pm

1 stop38h 25m

$1,271

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 8/2

6:00 am-5:20 pm

2 stops21h 20m

Incheon Intl

Tue 8/25

7:20 pm-12:36 am

1 stop19h 16m

$1,271

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Illinois to Seoul

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

Prices

Airlines

Other information

What is the cheapest month to fly to Seoul?

The month of November is another great option to travel to Seoul, with average flight prices from Illinois averaging around $909.

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

According to our data, Tuesday is the cheapest day to fly to Seoul from Illinois. The lowest ticket price found for a Tuesday departure recently was $874. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Seoul is Saturday, with ticket prices averaging around $1,101.

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

Flying to Seoul from Illinois in the morning is the least expensive time of day to depart. momondo users have found prices as low as $963 when looking at flights departing in the morning. In the evening is when there is more demand to fly to Seoul, so prices are often more expensive at around $982 per ticket.

What is the cheapest Illinois to Seoul flight route?

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

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

You are more likely to see cheaper flights to Seoul from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $1,458 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from Illinois for as low as $978 on momondo.

What cabin class options are available on Illinois to Seoul flights?

There are 4 cabin classes available to choose from on Illinois to Seoul 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 Seoul flights?

You could potentially save up to 19% on your flight if you consider stops on a Illinois to Seoul flight.

Cheap Illinois to Seoul flight deals and tips

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

Best Price Found	$558
Fastest flight time	14h 20m
Direct flights	Every day
Airports in Seoul	2 airports

The best one-way flight to Seoul from Illinois in the past 72 hours is $558. The best round-trip flight deal from Illinois to Seoul found on momondo in the last 72 hours is $933.

The fastest flight from Illinois to Seoul takes 14h 20m

Direct flights go from Illinois to Seoul every day.

There are 2 airports in Seoul. From Illinois there are direct flights to Incheon Intl (ICN).

Search flight deals

Frequently asked questions about flying from Illinois to Seoul

When did momondo last update prices for flights from Illinois to Seoul?
Prices for flights from Illinois to Seoul refresh daily.
How many operators does momondo search for flights from Illinois to Seoul?
As of April 2026, there are 10 operators available to choose from for flights from Illinois to Seoul.
How old do you have to be to fly from Illinois to Seoul?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Seoul.
What documentation or ID do you need to fly to Seoul?
The required travel and health documents for your Seoul 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Illinois to Seoul?
Based on momondo bookings for flights between Illinois and Seoul, the leading plane model is Boeing 777-300ER, making up 94.27% of the total bookings. Other popular models include Airbus A350-900 with 1.91%, Boeing 747-8 with 0.64%, and Boeing 787-10 Dreamliner with 0.64%.

Best airlines flying from Illinois to Seoul

Compare and see reviews for airlines that fly from Illinois to Seoul with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $194	Free Cancellation	Rating 7.9 8,424 reviews	Search Delta flights
Cathay Pacific	PriceFrom $639	Free Cancellation	Rating 7.6 1,280 reviews	Search Cathay Pacific flights
Turkish Airlines	PriceFrom $845	Free Cancellation	Rating 7.3 4,308 reviews	Search Turkish Airlines flights
American Airlines	PriceFrom $915	Free Cancellation	Rating 7.1 11,617 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $931	Free Cancellation	Rating 8.3 1,783 reviews	Search Japan Airlines flights
EVA Air	PriceFrom $948	Free Cancellation	Rating 8.5 1,419 reviews	Search EVA Air flights
Air Canada	PriceFrom $1,088	Free Cancellation	Rating 7.1 10,939 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $1,148	Free Cancellation	Rating 8.0 518 reviews	Search Asiana Airlines flights
Finnair	PriceFrom $1,259	Free Cancellation	Rating 7.7 1,390 reviews	Search Finnair flights
United Airlines	PriceFrom $1,409	Free Cancellation	Rating 7.4 9,605 reviews	Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Seoul. Millions of users trust and use momondo every year so you are in good hands.

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?

Price alerts on flights to Seoul from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from Illinois to Seoul from $389

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 8/23. 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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Delta flights from Illinois to Seoul

Our best Delta deals on Illinois to Seoul flight tickets

United Airlines flights from Illinois to Seoul

Our best United Airlines deals on Illinois to Seoul flight tickets

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How to get the cheapest flight ticket from Illinois to Seoul

What is the cheapest month to fly to Seoul?

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

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

What is the cheapest Illinois to Seoul flight route?

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

What cabin class options are available on Illinois to Seoul flights?

Can stopping save me money on Illinois to Seoul flights?

What is the cheapest airline that flies from Illinois to Seoul?

What airlines fly to Seoul?

How many flights depart from Illinois to Seoul on average per day?

How many flights depart from Illinois to Seoul on average per week?

How long does it take to fly to Seoul?

Cheap Illinois to Seoul flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Seoul

Frequently asked questions about flying from Illinois to Seoul

Best airlines flying from Illinois to Seoul

Compare and see reviews for airlines that fly from Illinois to Seoul with momondo

Why use momondo?

An easier way to manage your Seoul trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to South Korea

Fly into one of these airports located in Seoul

Airports listed have a maximum distance of 30.3 mi from Seoul

Fly your favorite airline to Seoul

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Seoul

List of cabin classes available on flights landing in Seoul. Availability may vary depending on flight origin and airline.

Popular cities in South Korea

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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