Cheap flights from Seoul to Illinois from $401
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to Illinois departing on 5/16. 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 Seoul to Illinois
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 Illinois?
The cheapest month to fly to Illinois from Seoul is in February. Flight prices, which tend to average around $876, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $895.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Seoul to Illinois is on a Tuesday when prices can be found for as low as $1,351. Flights from Seoul to Illinois on a Saturday will generally be more expensive and average around $1,868. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Seoul to Illinois during this time can be as low as $1,098. Flights in the evening are often more expensive with an average ticket price of $1,995.
What is the cheapest Seoul to Illinois flight route?
Fly from Incheon Intl to Chicago O'Hare Intl for the best Seoul - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Seoul when booking 10 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,332 when searching 10 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Seoul for as low as $1,109 on momondo.
What cabin class options are available on Seoul to Illinois flights?
There are 2 cabin classes available to choose from on Seoul to Illinois 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 Seoul to Illinois?
American Airlines, EVA Air, and WestJet are the most popular carriers operating from Seoul to Illinois
What airlines fly to Illinois?
Korean Air, American Airlines and Air Canada are the top three most popular airlines that fly to Illinois from Seoul according to our data. Korean Air is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seoul to Illinois on average per day?
The number of flights available between Seoul and Illinois is 1 per day as of May 2025. The most frequent departure time is 10:00AM, with 100% of daily flights leaving at noon.
How many flights depart from Seoul to Illinois on average per week?
10 flights are operational weekly from Seoul to Illinois as of May 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.
Cheap Seoul to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seoul to Illinois
When did momondo last update prices for flights from Seoul to Illinois?
Prices for flights from Seoul to Illinois were last updated today.
How many operators does momondo search for flights from Seoul to Illinois?
There are 6 operators available for flights from Seoul to Illinois as of May 2025.
How old do you have to be to fly from Seoul to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seoul to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seoul to Illinois?
Based on momondo bookings for flights between Seoul and Illinois, the leading plane model is Boeing 777-300ER, making up 88.24% of the total bookings. Other popular models include Airbus A350-900 with 6.13%, Boeing 787-9 Dreamliner with 2.21%, and Airbus A380-800 with 1.96%.
Best airlines flying from Seoul to Illinois
Compare and see reviews for airlines that fly from Seoul to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $383 | Free Cancellation | Rating 8.0 7,934 reviews | |||
| PriceFrom $697 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $730 | Free Cancellation | Rating 7.0 9,252 reviews | |||
| PriceFrom $959 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $1,047 | Free Cancellation | Rating 8.2 442 reviews | |||
| PriceFrom $1,153 | Free Cancellation | Rating 8.4 1,069 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seoul to Illinois?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seoul to Illinois for you.
Can I find flights from Seoul to Illinois with flexible booking policies on momondo?
All flight searches from Seoul to Illinois on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seoul to Illinois?
Once all potential Seoul to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Seoul to Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Seoul to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.