Cheap flights from Portland to Cascade Loop Scenic Byway

View AU$221 flight on Tue, 4 Nov. 2025Opens in a new window

Popular airlines from Portland to Cascade Loop Scenic Byway

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • Southwest Airlines

    Southwest Airlines

  • United

    United

  • Hawaiian Airlines

    Hawaiian Airlines

  • American Airlines

    American Airlines

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Cheap Flights from Portland (PDX) to Cascade Loop Scenic Byway (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, 4 Oct. - Sat, 11 Oct.
PDX
Portland
PAE
Seattle
AU$427 Return, found 1 day ago
AU$427
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 4 Oct. from Portland to Seattle, returning Sat, 11 Oct., priced at AU$427 found 1 day ago
Alaska Airlines
Sat, 4 Oct. - Sat, 11 Oct.
PDX
Portland
PAE
Seattle
AU$469 Return, found 1 day ago
AU$469
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 4 Oct. from Portland to Seattle, returning Sat, 11 Oct., priced at AU$469 found 1 day ago
Alaska Airlines
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
PAE
Seattle
AU$472 Return, found 3 days ago
AU$472
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$472 found 3 days ago
Alaska Airlines
Sat, 13 Sep. - Wed, 17 Sep.
PDX
Portland
PAE
Seattle
AU$551 Return, found 3 days ago
AU$551
Return
found 3 days ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$551 found 3 days ago

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

January is typically the cheapest month to fly

From AU$118 - AU$336 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.