$102 Cheap Flights from Seoul (GMP) to Ulsan (USN)

View $102 flight on Sat, Aug 30, 2025Opens in a new window

Popular airlines from Gimpo Intl. Airport (GMP) to Ulsan (USN)

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Cheap Flights from Seoul to Ulsan (GMP-USN)

Prices were available within the past 7 days and start at $102 for one-way flights and $204 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Sun, Oct 19 - Wed, Nov 12
GMP
Seoul
USN
Ulsan
$204 Roundtrip, found 4 days ago
$204
Roundtrip
found 4 days ago
Select Korean Air flight, departing Sun, Oct 19 from Seoul to Ulsan, returning Wed, Nov 12, priced at $204 found 4 days ago
Korean Air
Sat, Aug 9 - Sat, Aug 16
GMP
Seoul
USN
Ulsan
$205 Roundtrip, found 3 days ago
$205
Roundtrip
found 3 days ago
Select Korean Air flight, departing Sat, Aug 9 from Seoul to Ulsan, returning Sat, Aug 16, priced at $205 found 3 days ago
Korean Air
Fri, Sep 5 - Mon, Sep 8
GMP
Seoul
USN
Ulsan
$207 Roundtrip, found 1 day ago
$207
Roundtrip
found 1 day ago
Select Korean Air flight, departing Fri, Sep 5 from Seoul to Ulsan, returning Mon, Sep 8, priced at $207 found 1 day ago
Korean Air
Thu, Oct 2 - Mon, Oct 6
GMP
Seoul
USN
Ulsan
$208 Roundtrip, just found
$208
Roundtrip
just found
Select Korean Air flight, departing Thu, Oct 2 from Seoul to Ulsan, returning Mon, Oct 6, priced at $208 just found
Flights from Seoul (GMP) to Ulsan (USN)
Origin airport
Gimpo Intl.
Destination airport
Ulsan
Airlines serving
Korean Air
Roundtrip price
$204
Distance
196 mi
Average flight time
1 hour 3 mins

Seoul to Ulsan Flights

The cheapest times to fly from Seoul to Ulsan

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

 

The best time to book a flight from Seoul to Ulsan

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

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 Seoul to Ulsan in 2025. You can also book with separate airlines for your outbound and return journeys, from $102 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 Seoul to Ulsan 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 Seoul to Ulsan 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 Gimpo Intl. Airport (GMP) to Ulsan Airport (USN) cost?
Cheap return fares from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN) start from $204. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Korean Air flight leaving GMP on July 3 2025 and touching down at USN. The price was last updated on June 27 2025 and has not changed since.
What is the cheapest month to fly from GMP to USN?
The cheapest flights from GMP to USN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
You can fly directly from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN) on a Korean Air flight.
What is the cheapest airline that flies from GMP to USN?
With tickets starting at $103 for a one-way flight from GMP to USN, Korean Air is currently the cheapest carrier operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from GMP on September 16 2025. Prices were last updated on June 27 2025 and have not changed since.
How many flights per day from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
When taking off from Gimpo Intl. Airport (GMP), you'll have a choice from an average of 3 daily direct flights to Ulsan Airport (USN).
What are the most popular departure times for flights from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
Flights between GMP and USN are busiest at 7 AM. If you'd like a more relaxed experience and possibly cheaper tickets, look for a time outside the usual busy windows.
What day of the week has the most flights from GMP to USN?
Depart on a Friday if you're searching for the best selection of flights from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN).
What is the earliest flight from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
The first flight of the day leaving Gimpo Intl. Airport (GMP) is at around 7:50AM UTC+9. Board this plane and you'll land at Ulsan Airport (USN) at approximately 8:50AM UTC+9. The total flight duration is 1h.
How long does it take to fly from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
It takes roughly 1 hour to fly the 200 mi from GMP to USN.
What airline has the least delays from GMP to USN?
Korean Air has the strongest track record for on-time direct flights from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN), with an on-time score of 90%. Use the Expedia App to check your journey status before you leave and get notified of any changes.
What is the best time to fly from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
To arrive at Ulsan Airport (USN) on schedule, select a flight that takes off from Gimpo Intl. Airport (GMP) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Ulsan from Gimpo Intl. Airport (GMP)?
Gimpo Intl. Airport (GMP) offers direct flights to Ulsan. These are a few of the airports you can fly to without layovers:

  • Gimhae Airport (PUS)
  • Ulsan Airport (USN)
  • Pohang Airport (KPO)

Is it cheaper to buy a plane ticket from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN) last-minute?
Last-minute bookings from GMP to USN are typically more expensive. To lock in the cheapest rates, start looking for flights as early as possible. That said, if you're flexible with your travel dates, it's possible to find a cheap fare right before you leave.
Is it cheaper to book a GMP to USN flight and hotel package?
You can save money by booking a GMP to USN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After choosing your ideal flights and accommodations, consider adding extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from Gimpo Intl. Airport (GMP) to Ulsan Airport (USN)?
Typically, it's possible to cancel or reschedule your GMP to USN flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.