What airlines fly to Seoul?

Korean Air, Air Canada and EVA Air 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 55% 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.

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 35m and 27h 35m, respectively.

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

WestJet, American Airlines, and Japan Airlines are the most popular carriers operating from Illinois to Seoul

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

As of August 2025, 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 August 2025. The most popular departure time for this route is 12:00PM, with 100% of flights per day taking off in the afternoon.

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 August 2025, 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.

$341 Cheap Flights from Illinois to Seoul in 2025

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Find the cheapest flights from Illinois to Seoul

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

4:00 pm - 12:40 pmORD-ICN

30h 40m1 stop

8:05 pm - 2:25 pmICN-ORD

32h 20m1 stop

$760Cathay Pacific

Find Deal

Mon, Sep 8 - Mon, Sep 15

2:40 pm - 1:55 pmORD-ICN

32h 15m1 stop

7:35 pm - 1:00 pmICN-ORD

32h 25m1 stop

$761Cathay Pacific

Find Deal

Sun, Nov 9 - Thu, Nov 13

4:00 pm - 12:40 pmORD-ICN

30h 40m1 stop

3:10 pm - 2:25 pmICN-ORD

37h 15m1 stop

$763Cathay Pacific

Find Deal

Sat, Sep 27 - Sat, Oct 18

5:30 pm - 6:45 pmORD-ICN

35h 15m1 stop

6:55 pm - 12:12 amICN-ORD

44h 17m2 stops

$829

Find Deal

Fri, Oct 24 - Fri, Nov 14

6:00 am - 6:35 pmSTL-ICN

22h 35m1 stop

8:35 pm - 1:52 pmICN-STL

32h 17m1 stop

$851Hawaiian Airlines

Find Deal

Sat, Sep 20 - Fri, Feb 6

8:40 am - 5:20 pmSTL-ICN

18h 40m1 stop

8:05 pm - 12:37 amICN-STL

19h 32m2 stops

$857Delta

Find Deal

Fri, Sep 19 - Tue, Feb 3

6:00 am - 6:35 pmSTL-ICN

22h 35m1 stop

8:35 pm - 11:59 pmICN-STL

17h 24m1 stop

$866Alaska Airlines

Find Deal

Sat, Sep 27 - Sun, Oct 26

6:00 am - 4:30 pmSTL-ICN

20h 30m2 stops

10:15 am - 10:02 pmICN-STL

25h 47m2 stops

$871Delta

Find Deal

Sun, Aug 31 - Wed, Sep 3

11:15 am - 4:50 amORD-ICN

27h 35m2 stops

9:30 pm - 12:45 pmICN-ORD

29h 15m1 stop

$889

Find Deal

Wed, Sep 17 - Fri, Oct 17

6:30 pm - 7:00 pmSTL-ICN

34h 30m3 stops

9:25 pm - 2:39 pmICN-STL

31h 14m2 stops

$2,175Alaska Airlines

Find Deal

Mon, Sep 1 - Sat, Sep 20

Cathay Pacific flights from Illinois to Seoul

Our best Cathay Pacific deals on Illinois to Seoul flight tickets

Cathay Pacific

Sep 8

ORD4:00 pmChicago O'Hare Intl

30h 40m

1 stop

ICN12:40 pmIncheon Intl

Sep 15

ICN8:05 pmIncheon Intl

32h 20m

1 stop

ORD2:25 pmChicago O'Hare Intl

$760

Find similar

Cathay Pacific

Nov 9

ORD2:40 pmChicago O'Hare Intl

32h 15m

1 stop

ICN1:55 pmIncheon Intl

Nov 13

ICN7:35 pmIncheon Intl

32h 25m

1 stop

ORD1:00 pmChicago O'Hare Intl

$761

Find similar

Cathay Pacific

Sep 27

ORD4:00 pmChicago O'Hare Intl

30h 40m

1 stop

ICN12:40 pmIncheon Intl

Oct 18

ICN3:10 pmIncheon Intl

37h 15m

1 stop

ORD2:25 pmChicago O'Hare Intl

$763

Find similar

Delta flights from Illinois to Seoul

Our best Delta deals on Illinois to Seoul flight tickets

Delta

Sep 19

STL8:40 amLambert-St Louis

18h 40m

1 stop

ICN5:20 pmIncheon Intl

Feb 3

ICN8:05 pmIncheon Intl

19h 32m

2 stops

STL12:37 amLambert-St Louis

$857

Find similar

Delta

Aug 31

STL7:35 amLambert-St Louis

17h 45m

1 stop

ICN3:20 pmIncheon Intl

Dec 8

ICN5:50 pmIncheon Intl

17h 59m

1 stop

STL8:49 pmLambert-St Louis

$866

Find similar

Delta

Aug 31

STL6:00 amLambert-St Louis

20h 30m

2 stops

ICN4:30 pmIncheon Intl

Sep 3

ICN10:15 amIncheon Intl

25h 47m

2 stops

STL10:02 pmLambert-St Louis

$871

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Mon 9/8

4:00 pm-12:40 pm

1 stop30h 40m

Incheon Intl

Mon 9/15

8:05 pm-2:25 pm

1 stop32h 20m

$760

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 11/9

2:40 pm-1:55 pm

1 stop32h 15m

Incheon Intl

Thu 11/13

7:35 pm-1:00 pm

1 stop32h 25m

$761

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sat 9/27

4:00 pm-12:40 pm

1 stop30h 40m

Incheon Intl

Sat 10/18

3:10 pm-2:25 pm

1 stop37h 15m

$763

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Fri 10/24

5:30 pm-6:45 pm

1 stop35h 15m

Incheon Intl

Fri 11/14

6:55 pm-12:12 am

2 stops44h 17m

$829

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

6:00 am-6:35 pm

1 stop22h 35m

Incheon Intl

Fri 2/6

8:35 pm-1:52 pm

1 stop32h 17m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 9/19

8:40 am-5:20 pm

1 stop18h 40m

Incheon Intl

Tue 2/3

8:05 pm-12:37 am

2 stops19h 32m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/27

6:00 am-6:35 pm

1 stop22h 35m

Incheon Intl

Sun 10/26

8:35 pm-11:59 pm

1 stop17h 24m

$866

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 8/31

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Wed 9/3

10:15 am-10:02 pm

2 stops25h 47m

$871

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Wed 9/17

11:15 am-4:50 am

2 stops27h 35m

Incheon Intl

Fri 10/17

9:30 pm-12:45 pm

1 stop29h 15m

$889

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

6:30 pm-7:00 pm

3 stops34h 30m

Incheon Intl

Sat 9/20

9:25 pm-2:39 pm

2 stops31h 14m

$2,175

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 October is another great option to travel to Seoul, with average flight prices from Illinois averaging around $1,170.

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 $1,065. 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 Friday, with ticket prices averaging around $1,388.

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 $1,167 when looking at flights departing in the morning. In the afternoon is when there is more demand to fly to Seoul, so prices are often more expensive at around $1,430 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 $1,472 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 $1,278 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 36% 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	$341
Fastest flight time	16h 50m
Direct flights	Every day
Airports in Seoul	2 airports

The best one-way flight to Seoul from Illinois in the past 72 hours is $341. The best round-trip flight deal from Illinois to Seoul found on momondo in the last 72 hours is $760.

The fastest flight from Illinois to Seoul takes 16h 50m

Direct flights go from Illinois to Seoul every day.

There are 2 airports near Seoul: Incheon Intl (ICN), Seoul Gimpo Intl (GMP)

Search flight deals

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 August 2025, 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 82.82% of the total bookings. Other popular models include Boeing 777 with 4.05%, Boeing 787-9 Dreamliner with 4.05%, and Airbus A380-800 with 2.32%.

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
United Airlines	PriceFrom $660	Free Cancellation	Rating 7.4 8,925 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $805	Free Cancellation	Rating 7.6 969 reviews	Search Cathay Pacific flights
Turkish Airlines	PriceFrom $848	Free Cancellation	Rating 7.3 3,945 reviews	Search Turkish Airlines flights
Air Canada	PriceFrom $891	Free Cancellation	Rating 7.1 9,992 reviews	Search Air Canada flights
American Airlines	PriceFrom $895	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
EVA Air	PriceFrom $1,090	Free Cancellation	Rating 8.4 1,232 reviews	Search EVA Air flights
Delta	PriceFrom $1,097	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Finnair	PriceFrom $1,110	Free Cancellation	Rating 7.6 1,320 reviews	Search Finnair flights
Asiana Airlines	PriceFrom $1,271	Free Cancellation	Rating 8.2 476 reviews	Search Asiana Airlines flights
Korean Air	PriceFrom $1,498	Free Cancellation	Rating 8.4 1,131 reviews	Search Korean Air 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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Find better results for your trip to South Korea

Fly into one of these airports located in Seoul

Seoul Gimpo Intl Airport

Incheon Intl Airport

Cheap flights from Illinois to Seoul from $341

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 10/18. 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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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Price Alerts

Price Alerts

Find the cheapest flights from Illinois to Seoul

Cheap round-trip flights

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Cheap last minute flights

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Cathay Pacific flights from Illinois to Seoul

Our best Cathay Pacific deals on Illinois to Seoul flight tickets

Delta flights from Illinois to Seoul

Our best Delta deals on Illinois to Seoul flight tickets

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Use the filters below to find and compare flights from Illinois to Seoul that are best for you.

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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

What is the cheapest month to fly to Seoul?

The month of October is another great option to travel to Seoul, with average flight prices from Illinois averaging around $1,170.

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?

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?

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 36% on your flight if you consider stops on a Illinois to Seoul flight.

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

WestJet, American Airlines, and Japan Airlines are the most popular carriers operating from Illinois to Seoul

What airlines fly to Seoul?

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

2 flights are operational daily from Illinois to Seoul as of August 2025. The most popular departure time for this route is 12:00PM, with 100% of flights per day taking off in the afternoon.

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

As of August 2025, 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 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 35m and 27h 35m, respectively.

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

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

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

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

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

What is the most popular plane model 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?

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

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

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

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

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