$79 Cheap Flights from Seattle (SEA) to Pasco (PSC)

View $79 flight on Tue, Aug 19, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Tri-Cities Airport (PSC)

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Cheap Flights from Seattle to Pasco (SEA-PSC)

Prices were available within the past 7 days and start at $79 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Hawaiian Airlines
Sat, Aug 30 - Sat, Sep 13
SEA
Seattle
PSC
Pasco
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Hawaiian Airlines flight, departing Sat, Aug 30 from Seattle to Pasco, returning Sat, Sep 13, priced at $117 just found
Delta
Tue, Nov 4 - Sat, Nov 8
SEA
Seattle
PSC
Pasco
$117 Roundtrip, found 10 hours ago
$117
Roundtrip
found 10 hours ago
Select Delta flight, departing Tue, Nov 4 from Seattle to Pasco, returning Sat, Nov 8, priced at $117 found 10 hours ago
Hawaiian Airlines
Sun, Aug 31 - Sat, Sep 13
SEA
Seattle
PSC
Pasco
$127 Roundtrip, just found
$127
Roundtrip
just found
Select Hawaiian Airlines flight, departing Sun, Aug 31 from Seattle to Pasco, returning Sat, Sep 13, priced at $127 just found
Hawaiian Airlines
Sun, Aug 31 - Fri, Sep 12
SEA
Seattle
PSC
Pasco
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Hawaiian Airlines flight, departing Sun, Aug 31 from Seattle to Pasco, returning Fri, Sep 12, priced at $137 just found
Alaska Airlines
Sat, Aug 16 - Sun, Aug 17
SEA
Seattle
PSC
Pasco
$147 Roundtrip, found 6 days ago
$147
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Sat, Aug 16 from Seattle to Pasco, returning Sun, Aug 17, priced at $147 found 6 days ago
Alaska Airlines
Tue, Aug 19 - Wed, Aug 20
SEA
Seattle
PSC
Pasco
$157 Roundtrip, found 4 hours ago
$157
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Aug 19 from Seattle to Pasco, returning Wed, Aug 20, priced at $157 found 4 hours ago
Alaska Airlines
Tue, Nov 4 - Sat, Nov 8
SEA
Seattle
PSC
Pasco
$158 Roundtrip, found 10 hours ago
$158
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Tue, Nov 4 from Seattle to Pasco, returning Sat, Nov 8, priced at $158 found 10 hours ago
Delta
Tue, Aug 19 - Wed, Aug 20
SEA
Seattle
PSC
Pasco
$159 Roundtrip, found 4 hours ago
$159
Roundtrip
found 4 hours ago
Select Delta flight, departing Tue, Aug 19 from Seattle to Pasco, returning Wed, Aug 20, priced at $159 found 4 hours ago
American Airlines
Tue, Nov 4 - Sat, Nov 8
SEA
Seattle
PSC
Pasco
$217 Roundtrip, found 10 hours ago
$217
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Tue, Nov 4 from Seattle to Pasco, returning Sat, Nov 8, priced at $217 found 10 hours ago
United
Tue, Nov 4 - Sat, Nov 8
SEA
Seattle
PSC
Pasco
$475 Roundtrip, found 10 hours ago
$475
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Nov 4 from Seattle to Pasco, returning Sat, Nov 8, priced at $475 found 10 hours ago

Find the cheapest month to fly from Seattle (SEA) to Pasco (PSC)

February is typically the cheapest month to fly

From $77 - $217 per traveler.

Graph displaying average flight prices per month

Alternative airports near Pasco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Tri-Cities PSC. Cheapest and Closest option available. Average driving time to city center is 4 minutes. Flights from $237
PSC
Tri-Cities
CheapestClosest
Average driving time to city center4 min
Flights from $237
Flights from Seattle (SEA) to Pasco (PSC)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Tri-Cities
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$115
Distance
171 mi

Seattle to Pasco Flights

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

 

The best time to book a flight from Seattle to Pasco

Sunday is one of the best days to book for cheap flights from Seattle 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 Seattle 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 Seattle to Pasco in 2025. You can also book with separate airlines for your outbound and return journeys, from $79 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 Seattle 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 Seattle 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 Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC) cost?
Cheap round-trip fares from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC) start at $117. 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 Alaska Airlines flight leaving SEA on August 16 2025 and touching down at PSC. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from SEA to PSC?
The cheapest flights from SEA 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.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
Board a direct flight with Alaska Airlines and go straight from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC).
What is the cheapest airline that flies from SEA to PSC?
Right now, the cheapest airline operating one-way flights from SEA to PSC is Alaska Airlines. You can take off on this route from $79. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on October 18 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
With an average of 6 nonstop flights that operate from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC) daily, you'll be taking off on vacation soon enough.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
Flights between SEA and PSC are busiest at 10 PM. If you'd like a less crowded experience and potentially cheaper fares, look for a time outside the usual busy windows.
What day of the week has the most flights from SEA to PSC?
Friday has the most flights from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC). Consider taking off on this day and you'll have a greater chance of finding a departure that fits your plans.
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
The first flight of the day leaving from Seattle - Tacoma Intl. Airport (SEA) is at around 9:50AM UTC-8. Board this plane and you'll reach Tri-Cities Airport (PSC) at approximately 11:03AM UTC-8. The total time in the air is 1h 13m.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
The average flight time from SEA to PSC is 1 hour and 1 minute, covering a distance of 170 mi.
What airline has the least delays from SEA to PSC?
With 100% of flights usually landing on time, Aeromexico has the best on-time performance for direct flights from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC). To monitor your flight status and get notified if anything changes, use the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
Book a flight from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time are on average 22% more likely to be 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.
What airports do you fly into for Pasco from Seattle - Tacoma Intl. Airport (SEA)?
You can land at Tri-Cities Airport (PSC) or Walla Walla Regional Airport (ALW) when you travel to Pasco on a direct flight from Seattle - Tacoma Intl. Airport (SEA).
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC) last-minute?
Holding off until just before your trip to book a flight from SEA to PSC often results in higher prices. While you may find some last-minute deals, they aren't always guaranteed. Be flexible with your itinerary for the best chance of landing a bargain.
Is it cheaper to book a SEA to PSC flight and hotel package?
Compared with arranging flights and hotels separately, booking a SEA to PSC flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the stress out of travel planning. Just pick your flights and select from our extensive range of stays, then personalize your trip with extras like activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Airport (PSC)?
It's generally possible to reschedule or cancel your SEA to PSC flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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