Cheap flights from South Korea to Illinois from $443

The cheapest month to fly to Illinois from South Korea is in December. Flight prices, which tend to average around $726, 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 December, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $760.

The cheapest day to depart from South Korea to Illinois is on a Wednesday when prices can be found for as low as $1,317. Flights from South Korea to Illinois on a Thursday will generally be more expensive and average around $1,680. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

You are more likely to see cheaper flights to Illinois from South Korea when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,275 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from South Korea for as low as $896 on momondo.

There are 2 cabin classes available to choose from on South Korea to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 11% on your flight if you consider stops on a South Korea to Illinois flight.

EVA Air, Japan Airlines, and American Airlines are the most popular carriers operating from South Korea to Illinois

Korean Air, United Airlines and Delta are the top three most popular airlines that fly to Illinois from South Korea according to our data. Korean Air is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

As of August 2026, there are 2 flights per day flying from South Korea to Illinois. The most common time of day flights depart is 10:00AM, with 100% of flights taking off at noon.

As of August 2026, 14 flights take off from South Korea and land in Illinois each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.