Cheap flights from Illinois to Seoul from $396
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 8/22. 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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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 $1,181.
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 $1,082. 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 $1,372.
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 $1,179 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 $1,508 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 $1,302 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.
What is the cheapest airline that flies from Illinois to Seoul?
WestJet, American Airlines, and Delta are the most popular carriers operating from Illinois to Seoul
What airlines fly to Seoul?
Korean Air, Air Canada and Turkish 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 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 many flights depart from Illinois to Seoul on average per day?
2 flights are operational daily from Illinois to Seoul as of June 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 June 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 June 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 87.93% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 3.47%, Boeing 777 with 2.22%, and Airbus A350-900 with 1.80%.
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 $660 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom $805 | Free Cancellation | Rating 7.5 894 reviews | |||
| PriceFrom $848 | Free Cancellation | Rating 7.3 3,853 reviews | |||
| PriceFrom $891 | Free Cancellation | Rating 7.1 9,572 reviews | |||
| PriceFrom $895 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,079 | Free Cancellation | Rating 8.4 1,205 reviews | |||
| PriceFrom $1,110 | Free Cancellation | Rating 7.6 1,292 reviews | |||
| PriceFrom $1,271 | Free Cancellation | Rating 8.2 441 reviews | |||
| PriceFrom $1,271 | Free Cancellation | Rating 8.0 7,964 reviews | |||
| PriceFrom $1,515 | Free Cancellation | Rating 8.4 1,090 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.