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

  • Delta

    Delta

  • United

    United

  • American Airlines

    American Airlines

  • Hawaiian Airlines

    Hawaiian Airlines

  • JetBlue Airways

    JetBlue Airways

  • 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 30% 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 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 $439 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Aug. 19 - Fri, Aug. 22
DEN
Denver
BLI
Bellingham
CA $439 Roundtrip, found 4 hours ago
CA $439
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Aug. 19 from Denver to Bellingham, returning Fri, Aug. 22, priced at CA $439 found 4 hours ago
Alaska Airlines
Tue, Aug. 19 - Fri, Aug. 22
DEN
Denver
BLI
Bellingham
CA $471 Roundtrip, found 4 hours ago
CA $471
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Aug. 19 from Denver to Bellingham, returning Fri, Aug. 22, priced at CA $471 found 4 hours ago
Alaska Airlines
Tue, Aug. 19 - Fri, Aug. 22
DEN
Denver
BLI
Bellingham
CA $487 Roundtrip, found 4 hours ago
CA $487
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Tue, Aug. 19 from Denver to Bellingham, returning Fri, Aug. 22, priced at CA $487 found 4 hours ago
Alaska Airlines
Thu, Oct. 30 - Wed, Nov. 5
DEN
Denver
PAE
Seattle
CA $493 Roundtrip, found 1 day ago
CA $493
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Oct. 30 from Denver to Seattle, returning Wed, Nov. 5, priced at CA $493 found 1 day ago
American Airlines
Tue, Aug. 19 - Fri, Aug. 22
DEN
Denver
BLI
Bellingham
CA $514 Roundtrip, found 4 hours ago
CA $514
Roundtrip
found 4 hours ago
Select American Airlines flight, departing Tue, Aug. 19 from Denver to Bellingham, returning Fri, Aug. 22, priced at CA $514 found 4 hours ago
Hawaiian Airlines
Sat, Jul. 19 - Thu, Jul. 24
DEN
Denver
BLI
Bellingham
CA $595 Roundtrip, found 3 days ago
CA $595
Roundtrip
found 3 days ago
Select Hawaiian Airlines flight, departing Sat, Jul. 19 from Denver to Bellingham, returning Thu, Jul. 24, priced at CA $595 found 3 days 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.