$603 Cheap Flights from Seoul (ICN) to Pasco (PSC)

View $603 flight on Wed, Nov 19, 2025Opens in a new window

Popular airlines from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC)

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Cheap Flights from Seoul to Pasco (ICN-PSC)

Prices were available within the past 7 days and start at $603 for one-way flights and $637 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$637 Roundtrip, found 10 hours ago
$637
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $637 found 10 hours ago
United
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$639 Roundtrip, found 10 hours ago
$639
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $639 found 10 hours ago
United
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$642 Roundtrip, found 10 hours ago
$642
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $642 found 10 hours ago
United
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$644 Roundtrip, found 10 hours ago
$644
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $644 found 10 hours ago
United
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$651 Roundtrip, found 10 hours ago
$651
Roundtrip
found 10 hours ago
Select United flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $651 found 10 hours ago
Alaska Airlines
Sat, Oct 25 - Wed, Oct 29
ICN
Seoul
PSC
Pasco
$670 Roundtrip, found 3 days ago
$670
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Oct 25 from Seoul to Pasco, returning Wed, Oct 29, priced at $670 found 3 days ago
Alaska Airlines
Fri, Oct 24 - Tue, Oct 28
ICN
Seoul
PSC
Pasco
$677 Roundtrip, found 4 days ago
$677
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Oct 24 from Seoul to Pasco, returning Tue, Oct 28, priced at $677 found 4 days ago
Asiana Airlines
Sat, Oct 25 - Wed, Oct 29
ICN
Seoul
PSC
Pasco
$906 Roundtrip, found 3 days ago
$906
Roundtrip
found 3 days ago
Select Asiana Airlines flight, departing Sat, Oct 25 from Seoul to Pasco, returning Wed, Oct 29, priced at $906 found 3 days ago
Delta
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$1,277 Roundtrip, found 10 hours ago
$1,277
Roundtrip
found 10 hours ago
Select Delta flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $1,277 found 10 hours ago
American Airlines
Wed, Nov 26 - Sun, Nov 30
ICN
Seoul
PSC
Pasco
$1,665 Roundtrip, found 10 hours ago
$1,665
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Wed, Nov 26 from Seoul to Pasco, returning Sun, Nov 30, priced at $1,665 found 10 hours ago

Frequently asked questions

How much does a flight from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC) cost?
Grab a cheap one-way flight from $603 or cheap return flight from $637 from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC)?
Traveling in November is a good way to save, as it's the cheapest month for flights between ICN and PSC. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC)?
To find the cheapest airline that'll fly you from ICN to PSC, use Expedia's filter tool. Tailor your search based on what's important 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 Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC)?
Direct flights from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from ICN to PSC?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary 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 Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC)?
To avoid potential delays on the Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC) route, aim to fly before 3 PM. Departures after this hour have a 22% higher chance of being 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.
Is it cheaper to buy a plane ticket from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC) last-minute?
Booking your plane ticket from ICN to PSC right before your trip is typically more expensive. However, if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an ICN to PSC flight and hotel package?
You can save money by securing an ICN to PSC 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 everything in one place. Once you've selected your ideal flights and accommodations, you can add extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC)?
Typically, you can reschedule or cancel your ICN to PSC flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more details, visit our Customer Service portal.

Travel information

Origin airport
Incheon Intl.
Destination airport
Tri-Cities
Roundtrip price
$637
Distance
5371 mi

Book with confidence

Seoul to Pasco Flights

The cheapest times to fly from Seoul to Pasco

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

 

The best time to book a flight from Seoul to Pasco

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

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 Pasco in 2025. You can also book with separate airlines for your outbound and return journeys, from $603 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 Pasco 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 Pasco 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.

 

Seoul to Pasco Flights

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*Available to One Key members.