$724 Cheap Flights from Champaign (CMI) to Seoul (ICN)

View $724 flight on Wed, Nov 5, 2025Opens in a new window

Popular airlines from Champaign, IL (CMI-University Of Illinois Urbana-Champaign Williard) to Incheon Intl. Airport (ICN)

Cheap Flights from Champaign to Seoul (CMI-ICN)

Prices were available within the past 7 days and start at $724 for one-way flights and $1,560 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Sep 2 - Mon, Sep 22
CMI
Champaign
ICN
Seoul
$1,560 Roundtrip, found 1 day ago
$1,560
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 2 from Champaign to Seoul, returning Mon, Sep 22, priced at $1,560 found 1 day ago
American Airlines
Tue, Sep 2 - Mon, Sep 22
CMI
Champaign
ICN
Seoul
$1,563 Roundtrip, found 1 day ago
$1,563
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 2 from Champaign to Seoul, returning Mon, Sep 22, priced at $1,563 found 1 day ago
American Airlines
Tue, Sep 2 - Mon, Sep 22
CMI
Champaign
ICN
Seoul
$1,567 Roundtrip, found 1 day ago
$1,567
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 2 from Champaign to Seoul, returning Mon, Sep 22, priced at $1,567 found 1 day ago
American Airlines
Wed, Nov 5 - Tue, Nov 18
CMI
Champaign
ICN
Seoul
$1,689 Roundtrip, found 3 days ago
$1,689
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Nov 5 from Champaign to Seoul, returning Tue, Nov 18, priced at $1,689 found 3 days ago
Qatar Airways
Wed, Nov 5 - Tue, Nov 18
CMI
Champaign
ICN
Seoul
$1,700 Roundtrip, found 3 days ago
$1,700
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Wed, Nov 5 from Champaign to Seoul, returning Tue, Nov 18, priced at $1,700 found 3 days ago
Qatar Airways
Wed, Nov 5 - Tue, Nov 18
CMI
Champaign
ICN
Seoul
$1,701 Roundtrip, found 3 days ago
$1,701
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Wed, Nov 5 from Champaign to Seoul, returning Tue, Nov 18, priced at $1,701 found 3 days ago
Qatar Airways
Wed, Nov 5 - Thu, Nov 20
CMI
Champaign
ICN
Seoul
$1,702 Roundtrip, found 3 days ago
$1,702
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Wed, Nov 5 from Champaign to Seoul, returning Thu, Nov 20, priced at $1,702 found 3 days ago
Qatar Airways
Tue, Nov 4 - Thu, Nov 20
CMI
Champaign
ICN
Seoul
$1,704 Roundtrip, found 3 days ago
$1,704
Roundtrip
found 3 days ago
Select Qatar Airways flight, departing Tue, Nov 4 from Champaign to Seoul, returning Thu, Nov 20, priced at $1,704 found 3 days ago
American Airlines
Tue, Sep 2 - Mon, Sep 22
CMI
Champaign
ICN
Seoul
$1,720 Roundtrip, found 1 day ago
$1,720
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Sep 2 from Champaign to Seoul, returning Mon, Sep 22, priced at $1,720 found 1 day ago
American Airlines
Fri, Oct 31 - Fri, Nov 14
CMI
Champaign
ICN
Seoul
$1,722 Roundtrip, found 6 days ago
$1,722
Roundtrip
found 6 days ago
Select American Airlines flight, departing Fri, Oct 31 from Champaign to Seoul, returning Fri, Nov 14, priced at $1,722 found 6 days ago
Flights from Champaign (CMI) to Seoul (ICN)
Origin airport
University Of Illinois Urbana-Champaign Williard
Destination airport
Incheon Intl.
Airlines serving
American Airlines, Qatar Airways
Roundtrip price
$1,560
Distance
6647 mi

Champaign to Seoul Flights

The cheapest times to fly from Champaign to Seoul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Champaign to Seoul are during the month of September. You can find some of the cheapest flights from Champaign to Seoul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Champaign to Seoul

Sunday is one of the best days to book for cheap flights from Champaign to Seoul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Champaign to Seoul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Champaign to Seoul in 2025. You can also book with separate airlines for your outbound and return journeys, from $724 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Champaign to Seoul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Champaign to Seoul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Incheon Intl. Airport (ICN) cost?
Discover the latest flight deals from CMI to ICN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from CMI to ICN?
The cheapest flights from CMI to ICN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from CMI to ICN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from CMI to ICN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Incheon Intl. Airport (ICN)?
There aren't any daily direct flights departing from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Incheon Intl. Airport (ICN). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from CMI to ICN?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Incheon Intl. Airport (ICN)?
To arrive at Incheon Intl. Airport (ICN) on time, choose a flight that leaves University Of Illinois Urbana-Champaign Williard Airport (CMI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Incheon Intl. Airport (ICN) last-minute?
Waiting until just before your departure to book a ticket from CMI to ICN generally means paying more. While you might find some last-minute deals, there's no guarantee. Keep your travel schedule open for a better chance of scoring a bargain.
Is it cheaper to book a CMI to ICN flight and hotel package?
You can save money by booking a CMI to ICN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal flights and accommodations, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Incheon Intl. Airport (ICN)?
If you booked your CMI to ICN flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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*Available to One Key members.