Cheap flights from Portland to Cascade Loop Scenic Byway

View AU$259 flight on Mon, 22 Sep. 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, 13 Sep. - Wed, 17 Sep.
PDX
Portland
PAE
Seattle
AU$475 Return, found 14 hours ago
AU$475
Return
found 14 hours ago
Select Alaska Airlines flight, departing Sat, 13 Sep. from Portland to Seattle, returning Wed, 17 Sep., priced at AU$475 found 14 hours ago

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

January is typically the cheapest month to fly

From AU$117 - AU$333 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.