Cheap flights from Seattle to North Central Colorado

View AU$121 flight on Thu, 11 Dec. 2025Opens in a new window

Popular airlines from Seattle to North Central Colorado

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Seattle (SEA) to North Central Colorado (DEN)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, 11 Dec. - Wed, 17 Dec.
SEA
Seattle
DEN
Denver
AU$241 Return, found 15 hours ago
AU$241
Return
found 15 hours ago
Select Alaska Airlines flight, departing Thu, 11 Dec. from Seattle to Denver, returning Wed, 17 Dec., priced at AU$241 found 15 hours ago
Delta
Sat, 6 Sep. - Sat, 13 Sep.
SEA
Seattle
DEN
Denver
AU$242 Return, found 1 day ago
AU$242
Return
found 1 day ago
Select Delta flight, departing Sat, 6 Sep. from Seattle to Denver, returning Sat, 13 Sep., priced at AU$242 found 1 day ago
Alaska Airlines
Thu, 11 Dec. - Wed, 17 Dec.
SEA
Seattle
DEN
Denver
AU$253 Return, found 15 hours ago
AU$253
Return
found 15 hours ago
Select Alaska Airlines flight, departing Thu, 11 Dec. from Seattle to Denver, returning Wed, 17 Dec., priced at AU$253 found 15 hours ago
Alaska Airlines
Sat, 6 Sep. - Sat, 13 Sep.
SEA
Seattle
DEN
Denver
AU$254 Return, found 1 day ago
AU$254
Return
found 1 day ago
Select Alaska Airlines flight, departing Sat, 6 Sep. from Seattle to Denver, returning Sat, 13 Sep., priced at AU$254 found 1 day ago
United
Sat, 6 Sep. - Sat, 13 Sep.
SEA
Seattle
DEN
Denver
AU$303 Return, found 1 day ago
AU$303
Return
found 1 day ago
Select United flight, departing Sat, 6 Sep. from Seattle to Denver, returning Sat, 13 Sep., priced at AU$303 found 1 day ago
American Airlines
Sat, 6 Sep. - Sat, 13 Sep.
SEA
Seattle
DEN
Denver
AU$369 Return, found 1 day ago
AU$369
Return
found 1 day ago
Select American Airlines flight, departing Sat, 6 Sep. from Seattle to Denver, returning Sat, 13 Sep., priced at AU$369 found 1 day ago

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

January is typically the cheapest month to fly

From AU$100 - AU$402 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.