Cheap flights from Illinois to Seoul from $390

The cheapest month to fly to Incheon Intl Airport from Illinois is in April. Flight prices, which tend to average around $1,282, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of April, then departing from Illinois during the month November is also very affordable. Most momondo users find prices during this month for around $1,344.

The cheapest day to depart from Illinois to Incheon Intl Airport is on a Tuesday when prices can be found for as low as $964. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,165. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

In the evening is the cheapest time of day to fly from Illinois to Incheon Intl Airport when you can find flight prices for as low as $868. Flying to Incheon Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,038 on average. Flights to Incheon Intl Airport 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 - Incheon Intl flight prices

You are more likely to see cheaper flights to Incheon Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,521 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Illinois for as low as $987 on momondo.

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

Cathay Pacific, Turkish Airlines, and United Airlines are the most popular carriers operating from Illinois to Incheon Intl

Korean Air, EVA Air and Delta are the top three most popular airlines that fly to Incheon Intl Airport from Illinois according to our data. Korean Air is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Incheon Intl Airport. Keep in mind that there are 11 different airlines that fly to Incheon Intl Airport on a routine basis, so you have a few additional options to choose from.

As of September 2026, 2 flights take off from Illinois and land in Incheon Intl Airport each day. The most common flight departure time for this route is 12:00PM, with 100% of daily flights taking off in the afternoon.

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