Flights from Seattle to Northglenn

Cheapest flights from Seattle

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.

Fri, Oct 3 - Sun, Oct 5

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$127 Roundtrip, found 1 day ago

$127

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Oct 3 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Oct 5, priced at $127 found 1 day ago

Thu, Sep 4 - Mon, Sep 8

PAE

Seattle Paine Field Intl. Airport

DEN

Denver Intl.

$127 Roundtrip, found 1 day ago

$127

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Seattle Paine Field Intl. Airport to Denver Intl., returning Mon, Sep 8, priced at $127 found 1 day ago

Wed, Sep 3 - Mon, Sep 8

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$128 Roundtrip, found 1 day ago

$128

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Sep 3 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Sep 8, priced at $128 found 1 day ago

Fri, Oct 3 - Sun, Oct 5

PAE

Seattle Paine Field Intl. Airport

DEN

Denver Intl.

$133 Roundtrip, found 1 day ago

$133

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Oct 3 from Seattle Paine Field Intl. Airport to Denver Intl., returning Sun, Oct 5, priced at $133 found 1 day ago

Fri, Oct 3 - Sun, Oct 5

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$139 Roundtrip, found 1 day ago

$139

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Oct 3 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Oct 5, priced at $139 found 1 day ago

Tue, Sep 30 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$143 Roundtrip, found 1 day ago

$143

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 30 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, Oct 3, priced at $143 found 1 day ago

Wed, Sep 3 - Mon, Sep 8

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$147 Roundtrip, found 1 day ago

$147

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Sep 3 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Sep 8, priced at $147 found 1 day ago

Thu, Sep 4 - Tue, Sep 9

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$151 Roundtrip, found 4 days ago

$151

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Denver Intl., returning Tue, Sep 9, priced at $151 found 4 days ago

Thu, Sep 4 - Mon, Sep 8

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$153 Roundtrip, found 1 day ago

$153

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Sep 8, priced at $153 found 1 day ago

Wed, Sep 3 - Tue, Sep 9

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$153 Roundtrip, found 4 days ago

$153

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Sep 3 from Seattle - Tacoma Intl. to Denver Intl., returning Tue, Sep 9, priced at $153 found 4 days ago

Tue, Sep 30 - Thu, Oct 2

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$155 Roundtrip, found 1 day ago

$155

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 30 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Oct 2, priced at $155 found 1 day ago

Tue, Sep 30 - Sat, Oct 11

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$157 Roundtrip, found 1 day ago

$157

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Tue, Sep 30 from Seattle - Tacoma Intl. to Denver Intl., returning Sat, Oct 11, priced at $157 found 1 day ago

Thu, Sep 4 - Thu, Sep 11

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$158 Roundtrip, found 4 days ago

$158

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Sep 11, priced at $158 found 4 days ago

Wed, Sep 3 - Thu, Sep 11

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$160 Roundtrip, found 4 days ago

$160

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Sep 3 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Sep 11, priced at $160 found 4 days ago

Fri, Oct 3 - Sun, Oct 5

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$162 Roundtrip, found 1 day ago

$162

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Fri, Oct 3 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Oct 5, priced at $162 found 1 day ago

Thu, Oct 2 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$162 Roundtrip, found 1 day ago

$162

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 2 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, Oct 3, priced at $162 found 1 day ago

Thu, Sep 4 - Mon, Sep 8

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$163 Roundtrip, found 1 day ago

$163

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Sep 8, priced at $163 found 1 day ago

Thu, Sep 4 - Mon, Sep 8

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$164 Roundtrip, found 1 day ago

$164

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Sep 8, priced at $164 found 1 day ago

Mon, Oct 6 - Thu, Oct 9

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$183 Roundtrip, found 1 day ago

$183

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Mon, Oct 6 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Oct 9, priced at $183 found 1 day ago

Thu, Sep 4 - Mon, Sep 8

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$350 Roundtrip, found 1 day ago

$350

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, Sep 8, priced at $350 found 1 day ago