Cheap flights from Illinois to Seoul from $398
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 3/15. 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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1 adult
Economy
0 bags
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Cheap round-trip flights
These are some of the best round-trip flight deals from Illinois to Seoul that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Illinois to Seoul.
Cheap last minute flights
Planning a quick getaway from Illinois to Seoul? These are the last-minute flight deals available now.
Cheap direct flights
If you prefer a non-stop journey, check out our latest direct flight deals to Seoul, so you can enjoy a seamless trip without layovers.
Cheap bus & train deals from Illinois to Seoul
Find recent round-trip train or bus tickets from Illinois to Seoul.
All round-trip flight deals from Illinois to Seoul
The cheapest plane tickets from Illinois to Seoul found on KAYAK recently.
Air Canada flights from Illinois to Seoul
Our best Air Canada deals on Illinois to Seoul flight tickets
Air Canada![Air Canada]()
Mar 6![Air Canada]()
Mar 13
STL3:50 pmLambert-St Louis
35h 35m
1 stop
ICN6:25 pmIncheon Intl
ICN7:10 pmIncheon Intl
33h 56m
1 stop
STL3:06 pmLambert-St Louis
Air Canada![Air Canada]()
Feb 19![Air Canada]()
Mar 19
STL3:50 pmLambert-St Louis
35h 35m
1 stop
ICN6:25 pmIncheon Intl
ICN4:55 pmIncheon Intl
36h 11m
2 stops
STL3:06 pmLambert-St Louis
Turkish Airlines flights from Illinois to Seoul
Our best Turkish Airlines deals on Illinois to Seoul flight tickets
Turkish Airlines![Turkish Airlines]()
Mar 2![Turkish Airlines]()
Mar 10
ORD8:30 pmChicago O'Hare Intl
30h 50m
1 stop
ICN6:20 pmIncheon Intl
ICN12:10 amIncheon Intl
25h 00m
1 stop
ORD11:10 amChicago O'Hare Intl
Turkish Airlines![Turkish Airlines]()
Feb 18![Turkish Airlines]()
Mar 4
ORD8:30 pmChicago O'Hare Intl
30h 50m
1 stop
ICN6:20 pmIncheon Intl
ICN12:10 amIncheon Intl
25h 00m
1 stop
ORD10:10 amChicago O'Hare Intl
See travel insights to Seoul from
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 $1,147.
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 $1,556. 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 Sunday, with ticket prices averaging around $1,717.
What is the cheapest time of day to depart on your flight to Seoul?
Flying to Seoul from Illinois at noon is the least expensive time of day to depart. momondo users have found prices as low as $1,251 when looking at flights departing at noon. In the morning is when there is more demand to fly to Seoul, so prices are often more expensive at around $1,856 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 7 weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $1,612 when searching 7 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 $1,342 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.
What is the cheapest airline that flies from Illinois to Seoul?
Turkish Airlines, WestJet, and Cathay Pacific are the most popular carriers operating from Illinois to Seoul
What airlines fly to Seoul?
Korean Air, Air Canada and United Airlines 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 53% 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 many flights depart from Illinois to Seoul on average per day?
2 flights are operational daily from Illinois to Seoul as of January 2025. The most popular departure time for this route is 11:00AM, with 100% of flights per day taking off at noon.
How many flights depart from Illinois to Seoul on average per week?
As of January 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.
Cheap Illinois to Seoul flight deals and tips
Find info about flight duration, direct flights, and airports for your flight 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 January 2025, 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 86.72% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 3.32%, Airbus A380-800 with 1.99%, and Airbus A350-900 with 1.86%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $848 | Free Cancellation | Rating 7.3 3,931 reviews | |||
| PriceFrom $873 | Free Cancellation | Rating 7.5 830 reviews | |||
| PriceFrom $892 | Free Cancellation | Rating 7.0 8,627 reviews | |||
| PriceFrom $895 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $906 | Free Cancellation | Rating 7.4 8,982 reviews | |||
| PriceFrom $1,076 | Free Cancellation | Rating 8.4 1,255 reviews | |||
| PriceFrom $1,233 | Free Cancellation | Rating 7.6 1,285 reviews | |||
| PriceFrom $1,280 | Free Cancellation | Rating 8.2 466 reviews | |||
| PriceFrom $1,537 | Free Cancellation | Rating 8.4 1,039 reviews | |||
| PriceFrom $1,591 | Free Cancellation | Rating 8.0 8,521 reviews |
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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