$554 Cheap Flights from Chicago (ORD) to Busan (PUS)

View $554 flight on Wed, Aug 20, 2025Opens in a new window
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Cheap Flights from Chicago to Busan (ORD-PUS)

Prices were available within the past 7 days and start at $554 for one-way flights and $904 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Cathay Pacific
Mon, Sep 1 - Mon, Sep 29
ORD
Chicago
PUS
Busan
$904 Roundtrip, found 18 hours ago
$904
Roundtrip
found 18 hours ago
Select Cathay Pacific flight, departing Mon, Sep 1 from Chicago to Busan, returning Mon, Sep 29, priced at $904 found 18 hours ago
Cathay Pacific
Sat, Aug 30 - Mon, Sep 29
ORD
Chicago
PUS
Busan
$954 Roundtrip, found 20 hours ago
$954
Roundtrip
found 20 hours ago
Select Cathay Pacific flight, departing Sat, Aug 30 from Chicago to Busan, returning Mon, Sep 29, priced at $954 found 20 hours ago
Cathay Pacific
Mon, Sep 1 - Mon, Sep 29
ORD
Chicago
PUS
Busan
$985 Roundtrip, found 18 hours ago
$985
Roundtrip
found 18 hours ago
Select Cathay Pacific flight, departing Mon, Sep 1 from Chicago to Busan, returning Mon, Sep 29, priced at $985 found 18 hours ago
Cathay Pacific
Mon, Sep 1 - Sun, Sep 28
ORD
Chicago
PUS
Busan
$1,001 Roundtrip, found 20 hours ago
$1,001
Roundtrip
found 20 hours ago
Select Cathay Pacific flight, departing Mon, Sep 1 from Chicago to Busan, returning Sun, Sep 28, priced at $1,001 found 20 hours ago
Cathay Pacific
Sat, Aug 30 - Fri, Sep 26
ORD
Chicago
PUS
Busan
$1,004 Roundtrip, found 20 hours ago
$1,004
Roundtrip
found 20 hours ago
Select Cathay Pacific flight, departing Sat, Aug 30 from Chicago to Busan, returning Fri, Sep 26, priced at $1,004 found 20 hours ago
Cathay Pacific
Sat, Apr 26 - Mon, May 12
ORD
Chicago
PUS
Busan
$1,035 Roundtrip, found 4 hours ago
$1,035
Roundtrip
found 4 hours ago
Select Cathay Pacific flight, departing Sat, Apr 26 from Chicago to Busan, returning Mon, May 12, priced at $1,035 found 4 hours ago
Alaska Airlines
Thu, Nov 6 - Sat, Nov 15
ORD
Chicago
PUS
Busan
$1,091 Roundtrip, found 3 days ago
$1,091
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Nov 6 from Chicago to Busan, returning Sat, Nov 15, priced at $1,091 found 3 days ago
Air China
Tue, Sep 2 - Fri, Oct 3
ORD
Chicago
PUS
Busan
$1,828 Roundtrip, found 20 hours ago
$1,828
Roundtrip
found 20 hours ago
Select Air China flight, departing Tue, Sep 2 from Chicago to Busan, returning Fri, Oct 3, priced at $1,828 found 20 hours ago
Delta
Tue, Sep 2 - Tue, Sep 30
ORD
Chicago
PUS
Busan
$1,888 Roundtrip, found 20 hours ago
$1,888
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Sep 2 from Chicago to Busan, returning Tue, Sep 30, priced at $1,888 found 20 hours ago
Korean Air
Mon, Sep 1 - Mon, Sep 29
ORD
Chicago
PUS
Busan
$1,892 Roundtrip, found 18 hours ago
$1,892
Roundtrip
found 18 hours ago
Select Korean Air flight, departing Mon, Sep 1 from Chicago to Busan, returning Mon, Sep 29, priced at $1,892 found 18 hours ago
Flights from Chicago (ORD) to Busan (PUS)
Origin airport
O'Hare Intl.
Destination airport
Gimhae
Airlines serving
Air China, Cathay Pacific, Delta, Japan Airlines, KLM, Korean Air
Roundtrip price
$904
Distance
6618 mi

Chicago to Busan Flights

The cheapest times to fly from Chicago to Busan

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 Chicago to Busan are during the month of September. You can find some of the cheapest flights from Chicago to Busan with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Chicago to Busan

Sunday is one of the best days to book for cheap flights from Chicago to Busan: 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 Chicago to Busan

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 Chicago to Busan in 2025. You can also book with separate airlines for your outbound and return journeys, from $554 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 Chicago to Busan 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 Chicago to Busan 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 O'Hare Intl. Airport (ORD) to Gimhae Airport (PUS) cost?
Discover the latest flight deals from ORD to PUS 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 ORD to PUS?
The cheapest flights from ORD to PUS 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 ORD to PUS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ORD to PUS. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from O'Hare Intl. Airport (ORD) to Gimhae Airport (PUS)?
Nonstop flights from O’Hare Intl. Airport (ORD) to Gimhae Airport (PUS) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel details and select either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from ORD to PUS?
Typically you’ll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Gimhae Airport (PUS)?
Book a flight from O’Hare Intl. Airport (ORD) to Gimhae Airport (PUS) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Later departures have a 22% higher chance of being canceled, on average.**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 O'Hare Intl. Airport (ORD) to Gimhae Airport (PUS) last-minute?
Holding off until just before your departure to book a flight from ORD to PUS generally means paying more. While you might find some last-minute discounts, they’re not always guaranteed. Keep your travel plans flexible to boost your chances of scoring a bargain.
Is it cheaper to book an ORD to PUS flight and hotel package?
Compared with arranging hotels and flights separately, booking an ORD to PUS flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the hassle out of travel planning. Just secure your flights and choose from our extensive range of stays, then tailor your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Gimhae Airport (PUS)?
If you booked your ORD to PUS flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you have, 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.