Flights to Cascade Loop Scenic Byway from Portland - ￥43,460

View ￥43,460 flight on Wed, Sep 10, 2025Opens in a new window

Popular airlines from Portland to Cascade Loop Scenic Byway

  • Peach

    Peach

  • Skymark Airlines

    Skymark Airlines

  • All Nippon Airways

    All Nippon Airways

  • Japan Airlines

    Japan Airlines

  • Jetstar Japan

    Jetstar Japan

  • Solaseed Air

    Solaseed Air

  • STARFLYER

    STARFLYER

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Portland to Cascade Loop Scenic Byway (PDX-SEA)

Prices were available within the past 7 days and start at ￥43,460 for one-way flights and ￥119,140 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Aug 8 - Wed, Aug 13
PDX
Portland
PAE
Seattle
￥119,140 Roundtrip, found 5 days ago
￥119,140
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Aug 8 from Portland to Seattle, returning Wed, Aug 13, priced at ￥119,140 found 5 days ago
Delta
Fri, Aug 8 - Wed, Aug 13
PDX
Portland
PAE
Seattle
￥121,170 Roundtrip, found 5 days ago
￥121,170
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Aug 8 from Portland to Seattle, returning Wed, Aug 13, priced at ￥121,170 found 5 days ago
Delta
Fri, Aug 8 - Wed, Aug 13
PDX
Portland
PAE
Seattle
￥123,330 Roundtrip, found 5 days ago
￥123,330
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Aug 8 from Portland to Seattle, returning Wed, Aug 13, priced at ￥123,330 found 5 days ago
United
Fri, Aug 8 - Wed, Aug 13
PDX
Portland
PAE
Seattle
￥128,590 Roundtrip, found 5 days ago
￥128,590
Roundtrip
found 5 days ago
Select United flight, departing Fri, Aug 8 from Portland to Seattle, returning Wed, Aug 13, priced at ￥128,590 found 5 days ago
Alaska Airlines
Fri, Aug 8 - Wed, Aug 13
PDX
Portland
PAE
Seattle
￥160,950 Roundtrip, found 5 days ago
￥160,950
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Fri, Aug 8 from Portland to Seattle, returning Wed, Aug 13, priced at ￥160,950 found 5 days ago
American Airlines
Thu, Aug 7 - Thu, Aug 14
PDX
Portland
PAE
Seattle
￥342,680 Roundtrip, found 2 days ago
￥342,680
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Aug 7 from Portland to Seattle, returning Thu, Aug 14, priced at ￥342,680 found 2 days ago

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

January is typically the cheapest month to fly

From ￥11,172 - ￥31,751 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.