$99 Cheap Flights from Ulsan (USN) to Jeju (CJU)

View $99 flight on Thu, Jan 1, 2026Opens in a new window

Popular airlines from Ulsan (USN) to Jeju Intl. Airport (CJU)

Cheap Flights from Ulsan to Jeju (USN-CJU)

Prices were available within the past 7 days and start at $99 for one-way flights and $196 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Thu, Jan 1 - Fri, Jan 2
USN
Ulsan
CJU
Jeju City
$196 Roundtrip, found 5 days ago
$196
Roundtrip
found 5 days ago
Select Korean Air flight, departing Thu, Jan 1 from Ulsan to Jeju City, returning Fri, Jan 2, priced at $196 found 5 days ago
Korean Air
Fri, Dec 12 - Sun, Dec 14
USN
Ulsan
CJU
Jeju City
$198 Roundtrip, found 1 hour ago
$198
Roundtrip
found 1 hour ago
Select Korean Air flight, departing Fri, Dec 12 from Ulsan to Jeju City, returning Sun, Dec 14, priced at $198 found 1 hour ago
Flights from Ulsan (USN) to Jeju (CJU)
Origin airport
Ulsan
Destination airport
Jeju Intl.
Roundtrip price
$196
Distance
217 mi
Average flight time
1 hour 6 mins

Ulsan to Jeju Flights

The cheapest times to fly from Ulsan to Jeju

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

 

The best time to book a flight from Ulsan to Jeju

Sunday is one of the best days to book for cheap flights from Ulsan to Jeju: 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 Ulsan to Jeju

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 Ulsan to Jeju in 2025. You can also book with separate airlines for your outbound and return journeys, from $99 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 Ulsan to Jeju 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 Ulsan to Jeju 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 Ulsan Airport (USN) to Jeju Intl. Airport (CJU) cost?
Secure a cheap one-way flight from $99 or cheap return flight from $196 from Ulsan Airport (USN) to Jeju Intl. Airport (CJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
The cheapest month to fly from USN to CJU is January, when there's less demand. Off-peak months are often when you'll find cheap fares for travel between these airports.
Which airlines fly direct from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
Fly directly from Ulsan Airport (USN) to Jeju Intl. Airport (CJU) on a Korean Air flight.
What is the cheapest airline that flies from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
The cheapest airline to offer flights between Ulsan Airport (USN) and Jeju Intl. Airport (CJU) will change depending on your travel plans. Jin Air and Korean Air are just some well-known options offering reasonable prices. Use Expedia's filters to compare airlines in one place and find the right USN to CJU flight for your budget.
How many flights per day from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
With an average of 2 direct flights departing from Ulsan Airport (USN) to Jeju Intl. Airport (CJU) daily, you'll be jetting off in no time.
What are the most popular departure times for flights from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
More travelers fly between USN and CJU at 12 PM than at any other point in the day. Rather skip the crowds? Try choosing a quieter departure window and there's a chance you'll save on your ticket as well.
What day of the week has the most flights from USN to CJU?
Depart on a Friday if you're searching for the best choice of flights from Ulsan Airport (USN) to Jeju Intl. Airport (CJU).
What is the earliest flight from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
Ulsan Airport (USN)'s earliest flight to Jeju Intl. Airport (CJU) leaves at approximately 12:35PM UTC+9. With a total journey time of 1h 5m, you'll touch down at around 1:40PM UTC+9.
How long does it take to fly from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
It takes around 1 hour and 5 minutes to travel the 220 mi from USN to CJU.
What airline has the least delays from USN to CJU?
Jin Air has the best performance for on-time direct flights from Ulsan Airport (USN) to Jeju Intl. Airport (CJU), with an on-time rating of 93%. Use the Expedia App to look up your flight schedule before you take off and get immediate updates about any changes.
What is the best time to fly from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
Book a flight from Ulsan Airport (USN) to Jeju Intl. Airport (CJU) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**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.
What airports do you fly into for Jeju City from Ulsan Airport (USN)?
If you're on a direct flight from Ulsan Airport (USN) to Jeju City, Jeju Intl. Airport (CJU) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Ulsan Airport (USN) to Jeju Intl. Airport (CJU) last-minute?
Waiting until just before your departure to book a flight from USN to CJU often results in higher prices. Although you may find some last-minute deals, they're not always guaranteed. Be flexible with your travel plans for the best chance of scoring a bargain.
Is it cheaper to book an USN to CJU flight and hotel package?
Compared with arranging flights and hotels separately, booking an USN to CJU flight and hotel package with Expedia could result in significant savings. What's more, having everything in one convenient place takes the hassle out of planning your trip. Just secure your flights and select from our extensive range of stays, then personalize your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Ulsan Airport (USN) to Jeju Intl. Airport (CJU)?
In most cases, you can reschedule or cancel your USN to CJU flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, visit our Customer Service portal.

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*Available to One Key members.