Cheap flights from Washington to Seaside from CA $155

View CA $155 flight on Thu, Oct. 2, 2025Opens in a new window

Popular airlines from Washington to Seaside

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Cheap flights from Washington (WAS) to Seaside (PDX)

Prices were available within the past 7 days and start at CA $155 for one-way flights and CA $380 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Sat, Sep. 20 - Sat, Sep. 27
BWI
Baltimore
PDX
Portland
CA $380 Roundtrip, found 1 day ago
CA $380
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Sat, Sep. 20 from Baltimore to Portland, returning Sat, Sep. 27, priced at CA $380 found 1 day ago
Alaska Airlines
Sat, Sep. 20 - Sat, Sep. 27
DCA
Washington
PDX
Portland
CA $411 Roundtrip, found 7 hours ago
CA $411
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Sat, Sep. 20 from Washington to Portland, returning Sat, Sep. 27, priced at CA $411 found 7 hours ago
Alaska Airlines
Sat, Aug. 30 - Sat, Sep. 6
IAD
Washington
PDX
Portland
CA $430 Roundtrip, found 5 days ago
CA $430
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, Aug. 30 from Washington to Portland, returning Sat, Sep. 6, priced at CA $430 found 5 days ago
Delta
Sat, Aug. 30 - Sat, Sep. 6
IAD
Washington
PDX
Portland
CA $432 Roundtrip, found 5 days ago
CA $432
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Aug. 30 from Washington to Portland, returning Sat, Sep. 6, priced at CA $432 found 5 days ago
American Airlines
Sat, Aug. 30 - Sat, Sep. 6
IAD
Washington
PDX
Portland
CA $432 Roundtrip, found 5 days ago
CA $432
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Aug. 30 from Washington to Portland, returning Sat, Sep. 6, priced at CA $432 found 5 days ago
Hawaiian Airlines
Sat, Sep. 13 - Sat, Sep. 27
BWI
Baltimore
PDX
Portland
CA $435 Roundtrip, found 1 day ago
CA $435
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Sep. 13 from Baltimore to Portland, returning Sat, Sep. 27, priced at CA $435 found 1 day ago

Find the cheapest month to fly from Washington (WAS) to Portland (PDX)

September is typically the cheapest month to fly

From CA $131 - CA $352 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.