Cheap flights from Denver to Cascade Loop Scenic Byway from CA $115

View CA $115 flight on Fri, Oct. 3, 2025Opens in a new window

Popular airlines from Denver to Cascade Loop Scenic Byway

  • Alaska Airlines

    Alaska Airlines

  • American Airlines

    American Airlines

  • Delta

    Delta

  • Hawaiian Airlines

    Hawaiian Airlines

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Cheap flights from Denver (DEN) to Cascade Loop Scenic Byway (SEA)

Prices were available within the past 7 days and start at CA $115 for one-way flights and CA $340 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Apr. 21 - Thu, Apr. 30
DEN
Denver
BLI
Bellingham
CA $340 Roundtrip, found 5 days ago
CA $340
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr. 21 from Denver to Bellingham, returning Thu, Apr. 30, priced at CA $340 found 5 days ago
Alaska Airlines
Tue, Apr. 21 - Thu, Apr. 30
DEN
Denver
BLI
Bellingham
CA $415 Roundtrip, found 5 days ago
CA $415
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr. 21 from Denver to Bellingham, returning Thu, Apr. 30, priced at CA $415 found 5 days ago
American Airlines
Tue, Apr. 21 - Thu, Apr. 30
DEN
Denver
BLI
Bellingham
CA $459 Roundtrip, found 5 days ago
CA $459
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Apr. 21 from Denver to Bellingham, returning Thu, Apr. 30, priced at CA $459 found 5 days ago
Alaska Airlines
Tue, Apr. 21 - Thu, Apr. 30
DEN
Denver
BLI
Bellingham
CA $539 Roundtrip, found 5 days ago
CA $539
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Tue, Apr. 21 from Denver to Bellingham, returning Thu, Apr. 30, priced at CA $539 found 5 days ago
Hawaiian Airlines
Sat, Jul. 19 - Thu, Jul. 24
DEN
Denver
BLI
Bellingham
CA $595 Roundtrip, found 1 day ago
CA $595
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Sat, Jul. 19 from Denver to Bellingham, returning Thu, Jul. 24, priced at CA $595 found 1 day ago
Alaska Airlines
Sat, Jul. 19 - Sat, Jul. 26
DEN
Denver
BLI
Bellingham
CA $664 Roundtrip, found 1 day ago
CA $664
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Jul. 19 from Denver to Bellingham, returning Sat, Jul. 26, priced at CA $664 found 1 day ago

Find the cheapest month to fly from Denver (DEN) to Seattle (SEA)

January is typically the cheapest month to fly

From CA $89 - CA $357 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.