$589 Cheap Flights from Portland (PWM) to Seoul (GMP)

View $589 flight on Fri, Sep 26, 2025Opens in a new window

Popular airlines from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP)

Cheap Flights from Portland to Seoul (PWM-GMP)

Prices were available within the past 7 days and start at $589 for one-way flights and $1,890 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$1,890 Roundtrip, found 4 days ago
$1,890
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $1,890 found 4 days ago
United
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$2,049 Roundtrip, found 4 days ago
$2,049
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $2,049 found 4 days ago
United
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$2,050 Roundtrip, found 4 days ago
$2,050
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $2,050 found 4 days ago
Japan Airlines
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$2,117 Roundtrip, found 4 days ago
$2,117
Roundtrip
found 4 days ago
Select Japan Airlines flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $2,117 found 4 days ago
Japan Airlines
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$2,187 Roundtrip, found 4 days ago
$2,187
Roundtrip
found 4 days ago
Select Japan Airlines flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $2,187 found 4 days ago
United
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$2,209 Roundtrip, found 4 days ago
$2,209
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $2,209 found 4 days ago
United
Fri, Oct 24 - Fri, Oct 31
PWM
Portland
GMP
Seoul
$2,257 Roundtrip, found 4 days ago
$2,257
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 24 from Portland to Seoul, returning Fri, Oct 31, priced at $2,257 found 4 days ago
United
Thu, Jan 1 - Wed, Jan 7
PWM
Portland
GMP
Seoul
$2,642 Roundtrip, found 1 day ago
$2,642
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 1 from Portland to Seoul, returning Wed, Jan 7, priced at $2,642 found 1 day ago
United
Thu, Jan 1 - Wed, Jan 7
PWM
Portland
GMP
Seoul
$2,673 Roundtrip, found 1 day ago
$2,673
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 1 from Portland to Seoul, returning Wed, Jan 7, priced at $2,673 found 1 day ago
United
Thu, Jan 1 - Wed, Jan 7
PWM
Portland
GMP
Seoul
$2,802 Roundtrip, found 1 day ago
$2,802
Roundtrip
found 1 day ago
Select United flight, departing Thu, Jan 1 from Portland to Seoul, returning Wed, Jan 7, priced at $2,802 found 1 day ago
Flights from Portland (PWM) to Seoul (GMP)
Origin airport
Portland Intl. Jetport
Destination airport
Gimpo Intl.
Roundtrip price
$1,890
Distance
6724 mi

Portland to Seoul Flights

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

 

The best time to book a flight from Portland to Seoul

Sunday is one of the best days to book for cheap flights from Portland 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 Portland 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 Portland to Seoul in 2025. You can also book with separate airlines for your outbound and return journeys, from $589 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 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 Portland 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 Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP) cost?
Snag a cheap one-way flight from $589 or cheap return flight from $1,890 from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP)?
The cheapest month to fly from PWM to GMP is October, when demand is low. Off-peak season is typically when airlines offer better prices between these airports.
What is the cheapest airline that flies from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP)?
To find the cheapest airline that'll fly you from PWM to GMP, 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 cheapest flights first.
How many flights per day from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP)?
There are no daily direct flights available from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from PWM to GMP?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the airline, season 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 Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP)?
To reach Gimpo Intl. Airport (GMP) on time, pick a flight that leaves Portland Intl. Jetport Airport (PWM) before 3 PM. The chance 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. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP) last-minute?
Holding off until just before your departure to book your flight from PWM to GMP often results in higher prices. While it's possible to find some last-minute discounts, there's no guarantee. Be flexible with your travel plans for a better chance of snagging a bargain.
Is it cheaper to book a PWM to GMP flight and hotel package?
You'll typically save money by booking a PWM to GMP 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 convenient place. After selecting your preferred accommodations and flights, you can add extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Portland Intl. Jetport Airport (PWM) to Gimpo Intl. Airport (GMP)?
It's generally possible to cancel or reschedule your PWM to GMP flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.