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

WestJet, Alaska Airlines, and EVA Air are the most popular carriers operating from Illinois to Seoul

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 36% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 11 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 53m and 21h 45m, respectively.

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

As of June 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 June 2026. 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 June 2026, there are 11 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.

$415 Cheap Flights from Illinois to Seoul in 2026

Discover deals from 900+ travel sites with momondo.

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.

1:55 pm - 6:45 pm

STL

ICN

38h 50m

2 stops

8:45 pm - 2:49 pm

ICN

STL

32h 04m

2 stops

$1,065WestJet

Wed, Sep 16 - Fri, Sep 25

5:47 pm - 6:45 pm

STL

ICN

58h 58m

2 stops

8:45 pm - 11:20 pm

ICN

STL

40h 35m

2 stops

$1,093WestJet

Tue, Sep 8 - Tue, Sep 15

5:35 pm - 6:45 pm

ORD

ICN

35h 10m

3 stops

8:45 pm - 4:58 pm

ICN

ORD

34h 13m

3 stops

$1,177Multiple Airlines

Sun, Sep 6 - Sat, Sep 12

4:00 pm - 2:05 pm

ORD

ICN

32h 05m

1 stop

8:00 am - 2:20 pm

ICN

ORD

20h 20m

1 stop

$1,178Cathay Pacific

Sat, Aug 22 - Wed, Sep 9

4:00 pm - 12:40 pm

ORD

ICN

30h 40m

1 stop

3:10 pm - 2:20 pm

ICN

ORD

37h 10m

1 stop

$1,179Cathay Pacific

Sat, Aug 29 - Mon, Sep 7

5:30 pm - 6:45 pm

ORD

ICN

35h 15m

1 stop

8:40 pm - 4:40 pm

ICN

ORD

34h 00m

2 stops

$1,180Multiple Airlines

Thu, Sep 24 - Thu, Oct 15

2:40 pm - 5:30 pm

STL

ICN

36h 50m

1 stop

5:45 pm - 2:00 pm

ICN

STL

34h 15m

2 stops

$1,205Air Canada

Tue, Sep 8 - Tue, Sep 15

2:40 pm - 5:30 pm

STL

ICN

36h 50m

1 stop

5:45 pm - 2:00 pm

ICN

STL

34h 15m

2 stops

$1,206Air Canada

Tue, Sep 8 - Tue, Sep 15

12:30 am - 6:10 pm

ORD

GMP

27h 40m

1 stop

1:50 pm - 8:45 pm

GMP

ORD

20h 55m

1 stop

$1,279EVA Air

Sun, Sep 20 - Fri, Oct 2

12:30 am - 7:15 pm

ORD

GMP

28h 45m

1 stop

7:15 pm - 8:45 pm

GMP

ORD

39h 30m

1 stop

$1,333EVA Air

Mon, Aug 24 - Tue, Sep 8

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WestJet flights from Illinois to Seoul

Our best WestJet deals on Illinois to Seoul flight tickets

WestJet

Sep 16

STL1:55 pmLambert-St Louis

38h 50m

2 stops

ICN6:45 pmIncheon Intl

Sep 25

ICN8:45 pmIncheon Intl

32h 04m

2 stops

STL2:49 pmLambert-St Louis

$1,065

WestJet

Sep 8

STL5:47 pmLambert-St Louis

58h 58m

2 stops

ICN6:45 pmIncheon Intl

Sep 15

ICN8:45 pmIncheon Intl

40h 35m

2 stops

STL11:20 pmLambert-St Louis

$1,093

WestJet

Sep 8

STL5:46 pmLambert-St Louis

34h 59m

2 stops

ICN6:45 pmIncheon Intl

Sep 15

ICN8:45 pmIncheon Intl

37h 50m

2 stops

STL8:35 pmLambert-St Louis

$1,148

United Airlines flights from Illinois to Seoul

Our best United Airlines deals on Illinois to Seoul flight tickets

United Airlines

Aug 10

STL7:23 pmLambert-St Louis

18h 57m

1 stop

ICN4:20 amIncheon Intl

Aug 25

ICN11:30 amIncheon Intl

24h 30m

2 stops

STL10:00 pmLambert-St Louis

$1,400

United Airlines

Jul 28

STL6:01 amLambert-St Louis

32h 19m

2 stops

ICN4:20 amIncheon Intl

Aug 20

ICN11:30 amIncheon Intl

21h 09m

1 stop

STL6:39 pmLambert-St Louis

$1,460

United Airlines

Jul 28

STL3:22 pmLambert-St Louis

22h 58m

2 stops

ICN4:20 amIncheon Intl

Aug 20

ICN4:50 pmIncheon Intl

20h 09m

2 stops

STL10:59 pmLambert-St Louis

$1,464

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/16

1:55 pm-6:45 pm

2 stops38h 50m

Incheon Intl

Fri 9/25

8:45 pm-2:49 pm

2 stops32h 04m

$1,065

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/8

5:47 pm-6:45 pm

2 stops58h 58m

Incheon Intl

Tue 9/15

8:45 pm-11:20 pm

2 stops40h 35m

$1,093

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sun 9/6

5:35 pm-6:45 pm

3 stops35h 10m

Incheon Intl

Sat 9/12

8:45 pm-4:58 pm

3 stops34h 13m

$1,177

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sat 8/22

4:00 pm-2:05 pm

1 stop32h 05m

Incheon Intl

Wed 9/9

8:00 am-2:20 pm

1 stop20h 20m

$1,178

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sat 8/29

4:00 pm-12:40 pm

1 stop30h 40m

Incheon Intl

Mon 9/7

3:10 pm-2:20 pm

1 stop37h 10m

$1,179

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Thu 9/24

5:30 pm-6:45 pm

1 stop35h 15m

Incheon Intl

Thu 10/15

8:40 pm-4:40 pm

2 stops34h 00m

$1,180

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/8

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Tue 9/15

5:45 pm-2:00 pm

2 stops34h 15m

$1,205

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/8

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Tue 9/15

5:45 pm-2:00 pm

2 stops34h 15m

$1,206

Quickest round-trip

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Sun 9/20

12:30 am-6:10 pm

1 stop27h 40m

Seoul Gimpo Intl

Fri 10/2

1:50 pm-8:45 pm

1 stop20h 55m

$1,279

ChicagoSeoul

ORD - GMP

ORDGMP

Chicago O'Hare Intl

Mon 8/24

12:30 am-7:15 pm

1 stop28h 45m

Seoul Gimpo Intl

Tue 9/8

7:15 pm-8:45 pm

1 stop39h 30m

$1,333

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 $137.

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 $905. 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 $1,103.

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

Flying to Seoul from Illinois in the evening is the least expensive time of day to depart. momondo users have found prices as low as $982 when looking at flights departing in the evening. In the morning is when there is more demand to fly to Seoul, so prices are often more expensive at around $988 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 from Illinois 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 $1,490 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 $1,094 on momondo.

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

There are 3 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 13% 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	$591
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 $591. The best round-trip flight deal from Illinois to Seoul found on momondo in the last 72 hours is $942.

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 June 2026, there are 11 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 87.12% of the total bookings. Other popular models include Airbus A350-900 with 8.47%, Boeing 777 with 1.69%, and Boeing 787-10 Dreamliner with 0.68%.

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 7.8 8,431 reviews	Search Delta flights
Cathay Pacific	PriceFrom $639	Free Cancellation	Rating 7.6 1,388 reviews	Search Cathay Pacific flights
Turkish Airlines	PriceFrom $845	Free Cancellation	Rating 7.4 4,414 reviews	Search Turkish Airlines flights
American Airlines	PriceFrom $916	Free Cancellation	Rating 7.1 11,750 reviews	Search American Airlines flights
Japan Airlines	PriceFrom $931	Free Cancellation	Rating 8.3 1,849 reviews	Search Japan Airlines flights
EVA Air	PriceFrom $947	Free Cancellation	Rating 8.5 1,481 reviews	Search EVA Air flights
Air Canada	PriceFrom $1,088	Free Cancellation	Rating 7.1 11,251 reviews	Search Air Canada flights
Asiana Airlines	PriceFrom $1,148	Free Cancellation	Rating 8.1 547 reviews	Search Asiana Airlines flights
Finnair	PriceFrom $1,174	Free Cancellation	Rating 7.6 1,415 reviews	Search Finnair flights
United Airlines	PriceFrom $1,191	Free Cancellation	Rating 7.4 9,881 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 $415

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 8/18. 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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WestJet flights from Illinois to Seoul

Our best WestJet 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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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

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 from Illinois 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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