$69 Cheap Flights from Pasco (PSC) to Seattle (SEA)

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

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Cheap Flights from Pasco to Seattle (PSC-SEA)

Prices were available within the past 7 days and start at $69 for one-way flights and $97 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Aug 23 - Sat, Aug 30
PSC
Pasco
SEA
Seattle
$97 Roundtrip, found 2 hours ago
$97
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sat, Aug 23 from Pasco to Seattle, returning Sat, Aug 30, priced at $97 found 2 hours ago
Delta
Tue, Sep 23 - Sat, Oct 11
PSC
Pasco
SEA
Seattle
$97 Roundtrip, found 2 hours ago
$97
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Sep 23 from Pasco to Seattle, returning Sat, Oct 11, priced at $97 found 2 hours ago
Alaska Airlines
Sat, Aug 23 - Sat, Aug 30
PSC
Pasco
SEA
Seattle
$107 Roundtrip, found 2 hours ago
$107
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Sat, Aug 23 from Pasco to Seattle, returning Sat, Aug 30, priced at $107 found 2 hours ago
Alaska Airlines
Mon, Sep 15 - Sat, Oct 4
PSC
Pasco
SEA
Seattle
$117 Roundtrip, found 1 hour ago
$117
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Pasco to Seattle, returning Sat, Oct 4, priced at $117 found 1 hour ago
Alaska Airlines
Mon, Sep 15 - Sat, Oct 4
PSC
Pasco
SEA
Seattle
$127 Roundtrip, found 1 hour ago
$127
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Mon, Sep 15 from Pasco to Seattle, returning Sat, Oct 4, priced at $127 found 1 hour ago
Alaska Airlines
Thu, Aug 28 - Mon, Sep 1
PSC
Pasco
SEA
Seattle
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Aug 28 from Pasco to Seattle, returning Mon, Sep 1, priced at $137 just found
Delta
Wed, Aug 27 - Sat, Aug 30
PSC
Pasco
SEA
Seattle
$139 Roundtrip, found 21 hours ago
$139
Roundtrip
found 21 hours ago
Select Delta flight, departing Wed, Aug 27 from Pasco to Seattle, returning Sat, Aug 30, priced at $139 found 21 hours ago
Alaska Airlines
Sat, Oct 4 - Wed, Oct 8
PSC
Pasco
SEA
Seattle
$148 Roundtrip, found 16 hours ago
$148
Roundtrip
found 16 hours ago
Select Alaska Airlines flight, departing Sat, Oct 4 from Pasco to Seattle, returning Wed, Oct 8, priced at $148 found 16 hours ago
American Airlines
Wed, Aug 27 - Sat, Aug 30
PSC
Pasco
SEA
Seattle
$217 Roundtrip, found 21 hours ago
$217
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Wed, Aug 27 from Pasco to Seattle, returning Sat, Aug 30, priced at $217 found 21 hours ago
United
Sat, Oct 4 - Wed, Oct 8
PSC
Pasco
SEA
Seattle
$475 Roundtrip, found 16 hours ago
$475
Roundtrip
found 16 hours ago
Select United flight, departing Sat, Oct 4 from Pasco to Seattle, returning Wed, Oct 8, priced at $475 found 16 hours ago

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

February is typically the cheapest month to fly

From $77 - $207 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $187
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $187
Flights from Pasco (PSC) to Seattle (SEA)
Origin airport
Tri-Cities
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$97
Distance
171 mi
Average flight time
1 hour 12 mins

Pasco to Seattle Flights

The cheapest times to fly from Pasco to Seattle

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

 

The best time to book a flight from Pasco to Seattle

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

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 Pasco to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 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 Pasco to Seattle 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 Pasco to Seattle 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 Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA) cost?
Snag cheap return flights starting from $116 from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA). 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 PSC on August 16 2025 and touching down at SEA. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from PSC to SEA?
The cheapest flights from PSC to SEA 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 Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
When departing from Tri-Cities Airport (PSC), you can jump on a direct flight to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.
What is the cheapest airline that flies from PSC to SEA?
Journey from PSC to SEA with Alaska Airlines. This airline currently offers the cheapest one-way ticket on this route, starting at $79. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PSC on September 27 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
When taking off from Tri-Cities Airport (PSC), you can take your pick from an average of 6 daily direct flights to Seattle - Tacoma Intl. Airport (SEA).
What are the most popular departure times for flights from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
More travelers fly between PSC and SEA at 5 PM than at any other time of day. Rather skip the crowds? Consider flying outside peak hours and there's a chance you'll save on your fare as well.
What day of the week has the most flights from PSC to SEA?
If you depart on a Friday, you'll get the largest range of choices for flights from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
Tri-Cities Airport (PSC)'s first flight to Seattle - Tacoma Intl. Airport (SEA) leaves at approximately 5:00AM UTC-8. With a total flight time of 1h 24m, you'll arrive at around 6:24AM UTC-8.
How long does it take to fly from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
Typically, it takes 1 hour and 14 minutes to cover the 170 mi from PSC to SEA.
What airline has the least delays from PSC to SEA?
With 100% of flights generally arriving as scheduled, Aeromexico has the best on-time performance for direct flights from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA). To keep track of your flight status and get notifications if anything changes, use the Expedia App.
What is the best time to fly from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA) route, travel 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.
What airports do you fly into for Seattle from Tri-Cities Airport (PSC)?
If you're traveling on a direct flight from Tri-Cities Airport (PSC) to Seattle, Seattle - Tacoma Intl. Airport (SEA) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute fares from PSC to SEA are typically more expensive. To secure the cheapest rates, start searching for flights as early as possible. That being said, if your travel plans are flexible, it's possible to land a cheap fare right before your journey.
Is it cheaper to book a PSC to SEA flight and hotel package?
Compared with arranging hotels and flights separately, booking a PSC to SEA flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one convenient place takes the hassle out of planning your trip. Simply pick your flights and select from our wide range of stays, then personalize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Tri-Cities Airport (PSC) to Seattle - Tacoma Intl. Airport (SEA)?
Typically, you can reschedule or cancel your PSC to SEA flight. However, additional fees may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you want more information, head to our Customer Service portal.

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