Cheap flights from Ottawa to Cascade Loop Scenic Byway from CA $423

View CA $423 flight on Sat, Sep. 20, 2025Opens in a new window

Popular airlines from Ottawa to Cascade Loop Scenic Byway

  • WestJet

    WestJet

  • Air Canada

    Air Canada

  • United

    United

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Cheap flights from Ottawa (YOW) to Cascade Loop Scenic Byway (SEA)

Prices were available within the past 7 days and start at CA $423 for one-way flights and CA $877 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Porter Airlines
Thu., Nov. 6 - Wed., Nov. 12
YOW
Ottawa
PAE
Seattle
CA $877 Roundtrip, found 1 day ago
CA $877
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu., Nov. 6 from Ottawa to Seattle, returning Wed., Nov. 12, priced at CA $877 found 1 day ago
Porter Airlines
Sat., Nov. 15 - Mon., Nov. 17
YOW
Ottawa
PAE
Seattle
CA $890 Roundtrip, found 4 days ago
CA $890
Roundtrip
found 4 days ago
Select Porter Airlines flight, departing Sat., Nov. 15 from Ottawa to Seattle, returning Mon., Nov. 17, priced at CA $890 found 4 days ago
Porter Airlines
Fri., Nov. 7 - Wed., Nov. 12
YOW
Ottawa
PAE
Seattle
CA $904 Roundtrip, found 1 day ago
CA $904
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Fri., Nov. 7 from Ottawa to Seattle, returning Wed., Nov. 12, priced at CA $904 found 1 day ago
Porter Airlines
Thu., Nov. 6 - Wed., Nov. 12
YOW
Ottawa
PAE
Seattle
CA $908 Roundtrip, found 1 day ago
CA $908
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu., Nov. 6 from Ottawa to Seattle, returning Wed., Nov. 12, priced at CA $908 found 1 day ago
WestJet
Thu., Aug. 7 - Fri., Aug. 8
YOW
Ottawa
PAE
Seattle
CA $908 Roundtrip, found 1 day ago
CA $908
Roundtrip
found 1 day ago
Select WestJet flight, departing Thu., Aug. 7 from Ottawa to Seattle, returning Fri., Aug. 8, priced at CA $908 found 1 day ago
Porter Airlines
Thu., Nov. 6 - Wed., Nov. 12
YOW
Ottawa
PAE
Seattle
CA $910 Roundtrip, found 1 day ago
CA $910
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu., Nov. 6 from Ottawa to Seattle, returning Wed., Nov. 12, priced at CA $910 found 1 day ago

Find the cheapest month to fly from Ottawa (YOW) to Seattle (SEA)

August is typically the cheapest month to fly

From CA $348 - CA $609 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.