Flights from Denver to Seattle

Cheapest flights from Denver

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Sep 22 - Thu, Oct 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$128 Roundtrip, found 22 hours ago

$128

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to Seattle - Tacoma Intl., returning Thu, Oct 2, priced at $128 found 22 hours ago

Mon, Jul 21 - Tue, Jul 29

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$138 Roundtrip, found 2 days ago

$138

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Jul 21 from Denver Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $138 found 2 days ago

Sat, Jul 26 - Sat, Aug 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$143 Roundtrip, found 1 day ago

$143

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Jul 26 from Denver Intl. to Seattle - Tacoma Intl., returning Sat, Aug 2, priced at $143 found 1 day ago

Fri, Jul 25 - Tue, Jul 29

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$148 Roundtrip, found 1 day ago

$148

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Denver Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $148 found 1 day ago

Mon, Sep 15 - Mon, Sep 29

DEN

Denver Intl.

PAE

Seattle Paine Field Intl. Airport

$148 Roundtrip, found 5 days ago

$148

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Sep 15 from Denver Intl. to Seattle Paine Field Intl. Airport, returning Mon, Sep 29, priced at $148 found 5 days ago

Mon, Sep 22 - Thu, Oct 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$151 Roundtrip, found 22 hours ago

$151

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to Seattle - Tacoma Intl., returning Thu, Oct 2, priced at $151 found 22 hours ago

Tue, Sep 16 - Tue, Sep 30

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$157 Roundtrip, found 5 days ago

$157

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Tue, Sep 16 from Denver Intl. to Seattle - Tacoma Intl., returning Tue, Sep 30, priced at $157 found 5 days ago

Sat, Jul 19 - Mon, Jul 21

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$158 Roundtrip, found 2 days ago

$158

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Jul 19 from Denver Intl. to Seattle - Tacoma Intl., returning Mon, Jul 21, priced at $158 found 2 days ago

Mon, Jul 21 - Tue, Jul 29

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$163 Roundtrip, found 2 days ago

$163

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Jul 21 from Denver Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $163 found 2 days ago

Fri, Jul 25 - Sat, Aug 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$163 Roundtrip, found 1 day ago

$163

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Denver Intl. to Seattle - Tacoma Intl., returning Sat, Aug 2, priced at $163 found 1 day ago

Tue, Sep 16 - Mon, Sep 29

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$165 Roundtrip, found 5 days ago

$165

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Tue, Sep 16 from Denver Intl. to Seattle - Tacoma Intl., returning Mon, Sep 29, priced at $165 found 5 days ago

Mon, Sep 22 - Thu, Oct 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$166 Roundtrip, found 22 hours ago

$166

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to Seattle - Tacoma Intl., returning Thu, Oct 2, priced at $166 found 22 hours ago

Fri, Jul 18 - Mon, Jul 28

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$167 Roundtrip, found 2 days ago

$167

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Jul 18 from Denver Intl. to Seattle - Tacoma Intl., returning Mon, Jul 28, priced at $167 found 2 days ago

Fri, Jul 25 - Fri, Aug 1

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$168 Roundtrip, found 1 day ago

$168

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Denver Intl. to Seattle - Tacoma Intl., returning Fri, Aug 1, priced at $168 found 1 day ago

Mon, Sep 22 - Thu, Oct 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$170 Roundtrip, found 22 hours ago

$170

Roundtrip

found 22 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to Seattle - Tacoma Intl., returning Thu, Oct 2, priced at $170 found 22 hours ago

Mon, Sep 22 - Thu, Oct 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$173 Roundtrip, found 22 hours ago

$173

Roundtrip

found 22 hours ago

Select United flight, departing Mon, Sep 22 from Denver Intl. to Seattle - Tacoma Intl., returning Thu, Oct 2, priced at $173 found 22 hours ago

Mon, Sep 22 - Thu, Oct 2

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$173 Roundtrip, found 22 hours ago

$173

Roundtrip

found 22 hours ago

Select Delta flight, departing Mon, Sep 22 from Denver Intl. to Seattle - Tacoma Intl., returning Thu, Oct 2, priced at $173 found 22 hours ago

Tue, Jul 29 - Tue, Jul 29

DEN

Denver Intl.

SEA

Seattle - Tacoma Intl.

$177 Roundtrip, found 1 day ago

$177

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Jul 29 from Denver Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $177 found 1 day ago

Tue, Sep 9 - Wed, Sep 17

COS

Colorado Springs

SEA

Seattle - Tacoma Intl.

$217 Roundtrip, found 2 days ago

$217

Roundtrip

found 2 days ago

Select United flight, departing Tue, Sep 9 from Colorado Springs to Seattle - Tacoma Intl., returning Wed, Sep 17, priced at $217 found 2 days ago

Tue, Sep 9 - Wed, Sep 17

COS

Colorado Springs

SEA

Seattle - Tacoma Intl.

$277 Roundtrip, found 2 days ago

$277

Roundtrip

found 2 days ago

Select American Airlines flight, departing Tue, Sep 9 from Colorado Springs to Seattle - Tacoma Intl., returning Wed, Sep 17, priced at $277 found 2 days ago