Flights from Seattle to Cascade

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.

Wed, May 14 - Wed, May 14

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$144 Roundtrip, found 2 days ago

$144

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, May 14 from Seattle - Tacoma Intl. to Denver Intl., returning Wed, May 14, priced at $144 found 2 days ago

Mon, Jul 21 - Fri, Jul 25

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$148 Roundtrip, found 17 hours ago

$148

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Mon, Jul 21 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, Jul 25, priced at $148 found 17 hours ago

Thu, May 15 - Tue, May 20

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$164 Roundtrip, found 2 days ago

$164

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, May 15 from Seattle - Tacoma Intl. to Denver Intl., returning Tue, May 20, priced at $164 found 2 days ago

Wed, May 14 - Fri, May 16

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$175 Roundtrip, found 2 days ago

$175

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, May 14 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, May 16, priced at $175 found 2 days ago

Mon, Jul 21 - Thu, Jul 24

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$177 Roundtrip, found 17 hours ago

$177

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Mon, Jul 21 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Jul 24, priced at $177 found 17 hours ago

Sat, May 17 - Mon, May 19

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$181 Roundtrip, found 2 days ago

$181

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, May 17 from Seattle - Tacoma Intl. to Denver Intl., returning Mon, May 19, priced at $181 found 2 days ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$183 Roundtrip, found 17 hours ago

$183

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $183 found 17 hours ago

Thu, May 15 - Thu, May 15

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$184 Roundtrip, found 2 days ago

$184

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, May 15 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, May 15, priced at $184 found 2 days ago

Wed, May 14 - Sun, May 25

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$185 Roundtrip, found 2 days ago

$185

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, May 14 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, May 25, priced at $185 found 2 days ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$193 Roundtrip, found 17 hours ago

$193

Roundtrip

found 17 hours ago

Select American Airlines flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $193 found 17 hours ago

Thu, May 15 - Fri, May 16

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$195 Roundtrip, found 2 days ago

$195

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, May 15 from Seattle - Tacoma Intl. to Denver Intl., returning Fri, May 16, priced at $195 found 2 days ago

Tue, Jul 22 - Tue, Jul 29

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$197 Roundtrip, found 17 hours ago

$197

Roundtrip

found 17 hours ago

Select Hawaiian Airlines flight, departing Tue, Jul 22 from Seattle - Tacoma Intl. to Denver Intl., returning Tue, Jul 29, priced at $197 found 17 hours ago

Wed, May 14 - Sun, May 18

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$205 Roundtrip, found 2 days ago

$205

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, May 14 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, May 18, priced at $205 found 2 days ago

Tue, Jul 22 - Thu, Jul 24

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$206 Roundtrip, found 17 hours ago

$206

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Tue, Jul 22 from Seattle - Tacoma Intl. to Denver Intl., returning Thu, Jul 24, priced at $206 found 17 hours ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$212 Roundtrip, found 17 hours ago

$212

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $212 found 17 hours ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$213 Roundtrip, found 17 hours ago

$213

Roundtrip

found 17 hours ago

Select United flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $213 found 17 hours ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$217 Roundtrip, found 17 hours ago

$217

Roundtrip

found 17 hours ago

Select United flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $217 found 17 hours ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$227 Roundtrip, found 17 hours ago

$227

Roundtrip

found 17 hours ago

Select Delta flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $227 found 17 hours ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$237 Roundtrip, found 17 hours ago

$237

Roundtrip

found 17 hours ago

Select Alaska Airlines flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $237 found 17 hours ago

Thu, Jul 24 - Sun, Jul 27

SEA

Seattle - Tacoma Intl.

DEN

Denver Intl.

$327 Roundtrip, found 17 hours ago

$327

Roundtrip

found 17 hours ago

Select American Airlines flight, departing Thu, Jul 24 from Seattle - Tacoma Intl. to Denver Intl., returning Sun, Jul 27, priced at $327 found 17 hours ago