$629 Cheap Flights from Seoul (ICN) to Pasco (PSC)

View $629 flight on Thu, Oct 30, 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 $629 for one-way flights and $640 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$640 Roundtrip, found 5 days ago
$640
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $640 found 5 days ago
United
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$643 Roundtrip, found 5 days ago
$643
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $643 found 5 days ago
United
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$645 Roundtrip, found 5 days ago
$645
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $645 found 5 days ago
United
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$647 Roundtrip, found 5 days ago
$647
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $647 found 5 days ago
United
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$650 Roundtrip, found 5 days ago
$650
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $650 found 5 days ago
United
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$709 Roundtrip, found 5 days ago
$709
Roundtrip
found 5 days ago
Select United flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $709 found 5 days ago
Jeju Air
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$1,003 Roundtrip, found 5 days ago
$1,003
Roundtrip
found 5 days ago
Select Jeju Air flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $1,003 found 5 days ago
Asiana Airlines
Mon, Jul 21 - Wed, Jul 30
ICN
Seoul
PSC
Pasco
$1,060 Roundtrip, found 2 days ago
$1,060
Roundtrip
found 2 days ago
Select Asiana Airlines flight, departing Mon, Jul 21 from Seoul to Pasco, returning Wed, Jul 30, priced at $1,060 found 2 days ago
Delta
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$1,184 Roundtrip, found 5 days ago
$1,184
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $1,184 found 5 days ago
Korean Air
Thu, Feb 5 - Mon, Feb 16
ICN
Seoul
PSC
Pasco
$1,257 Roundtrip, found 5 days ago
$1,257
Roundtrip
found 5 days ago
Select Korean Air flight, departing Thu, Feb 5 from Seoul to Pasco, returning Mon, Feb 16, priced at $1,257 found 5 days ago
Flights from Seoul (ICN) to Pasco (PSC)
Origin airport
Incheon Intl.
Destination airport
Tri-Cities
Airlines serving
American Airlines, Delta, Japan Airlines, Korean Air, United
Roundtrip price
$640
Distance
5371 mi

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 February. 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 $629 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.

 

Frequently asked questions

How much does a flight from Incheon Intl. Airport (ICN) to Tri-Cities Airport (PSC) cost?
Discover the latest flight deals from ICN to PSC by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ICN to PSC?
The cheapest flights from ICN to PSC are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from ICN to PSC?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from ICN to PSC. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.

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*Available to One Key members.