Cheap flights from Illinois to South Korea from $401

If you aren’t able to travel to South Korea during the month of March, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $137.

On average, the least expensive day to fly to South Korea from Illinois is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $921. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to South Korea for around $1,121.

Flying to South Korea 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. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $995 on average. Flights to South Korea from Illinois in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Chicago O'Hare Intl to Incheon Intl for the best Illinois - South Korea flight prices

You are more likely to see cheaper flights to South Korea from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $1,479 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from Illinois for as low as $1,094 on momondo.

There are 4 cabin classes available to choose from on Illinois to South Korea flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

WestJet, Japan Airlines, and Alaska Airlines are the most popular carriers operating from Illinois to South Korea

Korean Air, EVA Air and Delta are the top three most popular airlines that fly to South Korea 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 South Korea. Keep in mind that there are 11 different airlines that fly to South Korea on a routine basis, so you have a few additional options to choose from.

2 flights are operational daily from Illinois to South Korea as of July 2026. The most popular departure time for this route is 12:00PM, with 100% of flights per day taking off in the afternoon.

14 flights are operational weekly from Illinois to South Korea as of July 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.