$69 Cheap Flights from Portland (PDX) to Seattle (SEA)

View $69 flight on Wed, May 21, 2025Opens in a new window

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

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Find available prices by choosing your travel dates.

Cheap Flights from Portland to Seattle (PDX-SEA)

Prices were available within the past 7 days and start at $69 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, May 20 - Wed, May 21
PDX
Portland
SEA
Seattle
$137 Roundtrip, found 5 hours ago
$137
Roundtrip
found 5 hours ago
Select Alaska Airlines flight, departing Tue, May 20 from Portland to Seattle, returning Wed, May 21, priced at $137 found 5 hours ago
Delta
Wed, May 28 - Tue, Jun 3
PDX
Portland
SEA
Seattle
$137 Roundtrip, found 14 hours ago
$137
Roundtrip
found 14 hours ago
Select Delta flight, departing Wed, May 28 from Portland to Seattle, returning Tue, Jun 3, priced at $137 found 14 hours ago
Delta
Wed, May 28 - Tue, Jun 3
PDX
Portland
SEA
Seattle
$138 Roundtrip, found 14 hours ago
$138
Roundtrip
found 14 hours ago
Select Delta flight, departing Wed, May 28 from Portland to Seattle, returning Tue, Jun 3, priced at $138 found 14 hours ago
Delta
Wed, May 28 - Tue, Jun 3
PDX
Portland
SEA
Seattle
$139 Roundtrip, found 14 hours ago
$139
Roundtrip
found 14 hours ago
Select Delta flight, departing Wed, May 28 from Portland to Seattle, returning Tue, Jun 3, priced at $139 found 14 hours ago
Alaska Airlines
Sat, May 17 - Tue, May 20
PDX
Portland
SEA
Seattle
$147 Roundtrip, just found
$147
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, May 17 from Portland to Seattle, returning Tue, May 20, priced at $147 just found
Delta
Wed, May 28 - Fri, May 30
PDX
Portland
SEA
Seattle
$148 Roundtrip, found 7 hours ago
$148
Roundtrip
found 7 hours ago
Select Delta flight, departing Wed, May 28 from Portland to Seattle, returning Fri, May 30, priced at $148 found 7 hours ago
Alaska Airlines
Wed, May 21 - Sat, May 31
PDX
Portland
SEA
Seattle
$149 Roundtrip, found 2 hours ago
$149
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Wed, May 21 from Portland to Seattle, returning Sat, May 31, priced at $149 found 2 hours ago
Hawaiian Airlines
Fri, May 16 - Thu, May 22
PDX
Portland
SEA
Seattle
$157 Roundtrip, found 5 hours ago
$157
Roundtrip
found 5 hours ago
Select Hawaiian Airlines flight, departing Fri, May 16 from Portland to Seattle, returning Thu, May 22, priced at $157 found 5 hours ago
Southwest Airlines
Wed, Jun 11 - Fri, Jun 13
PDX
Portland
SEA
Seattle
$327 Roundtrip, found 15 hours ago
$327
Roundtrip
found 15 hours ago
Select Southwest Airlines flight, departing Wed, Jun 11 from Portland to Seattle, returning Fri, Jun 13, priced at $327 found 15 hours ago
United
Tue, Jun 3 - Tue, Jun 10
PDX
Portland
SEA
Seattle
$403 Roundtrip, found 1 day ago
$403
Roundtrip
found 1 day ago
Select United flight, departing Tue, Jun 3 from Portland to Seattle, returning Tue, Jun 10, priced at $403 found 1 day ago
Flights from Portland (PDX) to Seattle (SEA)
Origin airport
Portland Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, Delta, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$131
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 May. 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 $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 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?
Cheap round-trip flights from Portland Intl. Airport (PDX) to Seattle - Tacoma Intl. Airport (SEA) start at $131. 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 PDX on May 14 2025 and touching down at SEA. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from PDX to SEA?
The cheapest flights from PDX 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 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 PDX to SEA?
Travel from PDX to SEA with Alaska Airlines. This airline currently has the cheapest one-way fare for this route, starting at $69. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PDX on June 10 2025. Prices were last updated on April 24 2025 and have not changed since.
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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