$79 Cheap Flights from Portland (PDX) to Seattle (SEA)

View $79 flight on Tue, Sep 23, 2025Opens in a new window

Popular airlines from Portland International Airport (PDX) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Portland to Seattle (PDX-SEA)

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.

Alaska Airlines
Sat, Sep 13 - Sat, Sep 20
PDX
Portland
SEA
Seattle
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Sep 13 from Portland to Seattle, returning Sat, Sep 20, priced at $117 just found
Delta
Sat, Sep 20 - Tue, Sep 23
PDX
Portland
SEA
Seattle
$117 Roundtrip, found 1 hour ago
$117
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Sep 20 from Portland to Seattle, returning Tue, Sep 23, priced at $117 found 1 hour ago
Alaska Airlines
Sat, Sep 13 - Sat, Sep 20
PDX
Portland
SEA
Seattle
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Sep 13 from Portland to Seattle, returning Sat, Sep 20, priced at $137 just found
Alaska Airlines
Sun, Nov 2 - Tue, Nov 11
PDX
Portland
SEA
Seattle
$147 Roundtrip, just found
$147
Roundtrip
just found
Select Alaska Airlines flight, departing Sun, Nov 2 from Portland to Seattle, returning Tue, Nov 11, priced at $147 just found
Alaska Airlines
Tue, Sep 16 - Wed, Sep 17
PDX
Portland
SEA
Seattle
$157 Roundtrip, found 20 hours ago
$157
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Tue, Sep 16 from Portland to Seattle, returning Wed, Sep 17, priced at $157 found 20 hours ago
Delta
Tue, Dec 9 - Wed, Dec 10
PDX
Portland
SEA
Seattle
$158 Roundtrip, found 1 day ago
$158
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Dec 9 from Portland to Seattle, returning Wed, Dec 10, priced at $158 found 1 day ago
Delta
Wed, Nov 5 - Mon, Nov 10
PDX
Portland
SEA
Seattle
$160 Roundtrip, found 6 days ago
$160
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Nov 5 from Portland to Seattle, returning Mon, Nov 10, priced at $160 found 6 days ago
Frontier Airlines
Sat, Oct 4 - Sat, Oct 11
PDX
Portland
SEA
Seattle
$169 Roundtrip, found 4 days ago
$169
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Oct 4 from Portland to Seattle, returning Sat, Oct 11, priced at $169 found 4 days ago
Southwest Airlines
Tue, Oct 14 - Wed, Oct 15
PDX
Portland
SEA
Seattle
$222 Roundtrip, found 2 days ago
$222
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, Oct 14 from Portland to Seattle, returning Wed, Oct 15, priced at $222 found 2 days ago
United
Tue, Dec 16 - Wed, Dec 31
PDX
Portland
SEA
Seattle
$347 Roundtrip, found 1 day ago
$347
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from Portland to Seattle, returning Wed, Dec 31, priced at $347 found 1 day ago

Find the cheapest month to fly from Portland (PDX) to Seattle (SEA)

January is typically the cheapest month to fly

From $76 - $217 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 $297
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $297
0
Flights from Portland (PDX) to Seattle (SEA)
Origin airport
Portland Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta, Southwest Airlines, United
Roundtrip price
$117
Distance
128 mi

Portland to Seattle Flights

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

 

The best time to book a flight from Portland to Seattle

Sunday is one of the best days to book for cheap flights from Portland 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 Portland 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 Portland to Seattle 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 Portland 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 Portland 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 Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA) cost?
Grab a cheap one-way flight from $79 or cheap return flight from $117 from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA) 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. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
Planning your getaway for September can help you save, as it's the cheapest month for flights between PDX and SEA. You'll usually find the lowest prices during off-peak months.
Which airlines fly direct from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
If you're departing from Portland Intl. Airport (PDX), you can catch a nonstop flight to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
While prices can change depending on when you travel, Delta Air Lines and Alaska Airlines are go-to choices for flights between Portland Intl. Airport (PDX) and Seattle - Tacoma Intl. Airport (SEA). You can also compare airlines on Expedia and use the "Sort by" filter to find the best deal for your PDX to SEA flight.
How many flights per day from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
With, on average, 19 nonstop flights that operate from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA) every day, you'll be cruising above the clouds before you know it.
What are the most popular departure times for flights from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
Flights between PDX and SEA tend to be busiest at 5 AM. If you want a more relaxed trip and possibly cheaper tickets, choose a time outside the usual busy windows.
What day of the week has the most flights from PDX to SEA?
Friday offers the most flights from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA). Consider traveling on this day and you'll have the best chance of finding a departure that fits your schedule.
What is the earliest flight from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
Take the earliest flight at around 5:05AM UTC-8, departing from Portland Intl. Airport (PDX). You'll be traveling for roughly 55m, landing at Seattle - Tacoma Intl. Airport (SEA) at approximately 6:00AM UTC-8.
How long does it take to fly from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
It takes approximately 1 hour and 5 minutes to travel the 130 mi from PDX to SEA.
What airline has the least delays from PDX to SEA?
With 100% of journeys typically landing on time, China Eastern Airlines has the best on-time performance for direct flights from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA). To keep track of your flight status and get notified if anything changes, head to the Expedia App.
What is the best time to fly from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
Choose a flight from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this hour 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 Seattle from Portland Intl. Airport (PDX)?
Browse your flight options from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA). This is the only airport in Seattle you can touch down at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your trip to book a flight from PDX to SEA generally means paying more. While you may come across some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for the best chance of getting a bargain.
Is it cheaper to book a PDX to SEA flight and hotel package?
You can save money by booking a PDX to SEA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've selected your preferred flights and accommodations, consider adding extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA)?
It's usually possible to reschedule or cancel your PDX to SEA flight. However, if it's been more than 24 hours since booking, additional fees 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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