Cheap flights from Portland to Northwest Washington

View AU$106 flight on Sat, 16 Aug. 2025Opens in a new window

Popular airlines from Portland to Northwest Washington

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

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Cheap Flights from Portland (PDX) to Northwest Washington (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
SEA
Seattle
AU$150 Return, found 2 days ago
AU$150
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$150 found 2 days ago
Delta
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
SEA
Seattle
AU$151 Return, found 2 days ago
AU$151
Return
found 2 days ago
Select Delta flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$151 found 2 days ago
Alaska Airlines
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
SEA
Seattle
AU$181 Return, found 2 days ago
AU$181
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$181 found 2 days ago
Alaska Airlines
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
SEA
Seattle
AU$196 Return, found 2 days ago
AU$196
Return
found 2 days ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$196 found 2 days ago
Delta
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
SEA
Seattle
AU$198 Return, found 2 days ago
AU$198
Return
found 2 days ago
Select Delta flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$198 found 2 days ago
American Airlines
Mon, 1 Sep. - Mon, 8 Sep.
PDX
Portland
SEA
Seattle
AU$515 Return, found 5 days ago
AU$515
Return
found 5 days ago
Select American Airlines flight, departing Mon, 1 Sep. from Portland to Seattle, returning Mon, 8 Sep., priced at AU$515 found 5 days ago

Find the cheapest month to fly from Portland (PDX) to Bellingham (BLI)

January is typically the cheapest month to fly

From AU$303 - AU$836 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.