Cheap Flights from Portland (PDX) to Ulsan (USN)

Popular airlines from Portland International Airport (PDX) to Ulsan (USN)

Cheap Flights from Portland to Ulsan (PDX-USN)

Prices were available within the past 7 days and start at for one-way flights and $1,312 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Mar 12 - Sun, Mar 22
PDX
Portland
USN
Ulsan
$1,312 Roundtrip, found 3 hours ago
$1,312
Roundtrip
found 3 hours ago
Select Delta flight, departing Thu, Mar 12 from Portland to Ulsan, returning Sun, Mar 22, priced at $1,312 found 3 hours ago
Korean Air
Mon, Mar 16 - Mon, Mar 23
PDX
Portland
USN
Ulsan
$1,313 Roundtrip, found 3 hours ago
$1,313
Roundtrip
found 3 hours ago
Select Korean Air flight, departing Mon, Mar 16 from Portland to Ulsan, returning Mon, Mar 23, priced at $1,313 found 3 hours ago

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Flights from Portland (PDX) to Ulsan (USN)
Origin airport
Portland Intl.
Destination airport
Ulsan
Roundtrip price
$1,312
Distance
5261 mi

Portland to Ulsan Flights

The cheapest times to fly from Portland 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 Portland to Ulsan are during the month of March. You can find some of the cheapest flights from Portland to Ulsan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Ulsan

Sunday is one of the best days to book for cheap flights from Portland 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 Portland 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 Portland to Ulsan in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Portland 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 Portland 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 Portland Intl. Airport (PDX) to Ulsan Airport (USN) cost?
Secure a cheap one-way flight or cheap return flight from $1,312 from Portland Intl. Airport (PDX) to Ulsan Airport (USN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Ulsan Airport (USN)?
Traveling in March can help you save, as it's the cheapest month for flights between PDX and USN. You'll typically find the lowest fares during the off-season.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Ulsan Airport (USN)?
To find the cheapest airline flying from PDX to USN, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Portland Intl. Airport (PDX) to Ulsan Airport (USN)?
You'll need to book a flight with a layover if you're traveling from Portland Intl. Airport (PDX) to Ulsan Airport (USN). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from PDX to USN?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change 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 Portland Intl. Airport (PDX) to Ulsan Airport (USN)?
To land at Ulsan Airport (USN) without delays, book a flight that leaves from Portland Intl. Airport (PDX) 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 Portland Intl. Airport (PDX) to Ulsan Airport (USN) last-minute?
Booking your flight from PDX to USN shortly before your getaway is generally more expensive. But if there's some wiggle room with your itinerary, you could bag a cheap last-minute fare.
Is it cheaper to book a PDX to USN flight and hotel package?
You can save money by securing a PDX to USN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your ideal accommodations and flights, you can add extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Ulsan Airport (USN)?
Typically, it's possible to reschedule or cancel your PDX to USN flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.