Flights from Boulder to Phoenix

Cheapest flights from Boulder

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.

Sat, Jul 26 - Tue, Jul 29

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$88 Roundtrip, found 2 days ago

$88

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Jul 26 from Denver Intl. to Sky Harbor Intl., returning Tue, Jul 29, priced at $88 found 2 days ago

Sat, May 17 - Tue, May 27

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$106 Roundtrip, found 5 days ago

$106

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, May 17 from Denver Intl. to Sky Harbor Intl., returning Tue, May 27, priced at $106 found 5 days ago

Sat, May 17 - Sat, May 24

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$107 Roundtrip, found 5 days ago

$107

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, May 17 from Denver Intl. to Sky Harbor Intl., returning Sat, May 24, priced at $107 found 5 days ago

Sat, Jul 12 - Tue, Jul 22

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$108 Roundtrip, found 6 days ago

$108

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from Denver Intl. to Sky Harbor Intl., returning Tue, Jul 22, priced at $108 found 6 days ago

Mon, May 19 - Tue, May 27

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$111 Roundtrip, found 5 days ago

$111

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, May 19 from Denver Intl. to Sky Harbor Intl., returning Tue, May 27, priced at $111 found 5 days ago

Mon, May 19 - Sat, May 24

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$112 Roundtrip, found 5 days ago

$112

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, May 19 from Denver Intl. to Sky Harbor Intl., returning Sat, May 24, priced at $112 found 5 days ago

Mon, May 19 - Thu, May 29

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$116 Roundtrip, found 5 days ago

$116

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, May 19 from Denver Intl. to Sky Harbor Intl., returning Thu, May 29, priced at $116 found 5 days ago

Sun, Jul 13 - Tue, Jul 22

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$118 Roundtrip, found 6 days ago

$118

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sun, Jul 13 from Denver Intl. to Sky Harbor Intl., returning Tue, Jul 22, priced at $118 found 6 days ago

Tue, May 20 - Tue, May 27

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$126 Roundtrip, found 5 days ago

$126

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, May 20 from Denver Intl. to Sky Harbor Intl., returning Tue, May 27, priced at $126 found 5 days ago

Tue, May 20 - Sat, May 24

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$127 Roundtrip, found 5 days ago

$127

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, May 20 from Denver Intl. to Sky Harbor Intl., returning Sat, May 24, priced at $127 found 5 days ago

Tue, May 20 - Thu, May 29

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$131 Roundtrip, found 5 days ago

$131

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, May 20 from Denver Intl. to Sky Harbor Intl., returning Thu, May 29, priced at $131 found 5 days ago

Sat, May 17 - Sun, May 25

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$136 Roundtrip, found 5 days ago

$136

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, May 17 from Denver Intl. to Sky Harbor Intl., returning Sun, May 25, priced at $136 found 5 days ago

Thu, May 22 - Sat, May 24

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$137 Roundtrip, found 5 days ago

$137

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, May 22 from Denver Intl. to Sky Harbor Intl., returning Sat, May 24, priced at $137 found 5 days ago

Mon, May 19 - Sun, May 25

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$141 Roundtrip, found 5 days ago

$141

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, May 19 from Denver Intl. to Sky Harbor Intl., returning Sun, May 25, priced at $141 found 5 days ago

Thu, Jul 24 - Sun, Jul 27

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$145 Roundtrip, found 2 days ago

$145

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Jul 24 from Denver Intl. to Sky Harbor Intl., returning Sun, Jul 27, priced at $145 found 2 days ago

Tue, Jul 15 - Sun, Jul 20

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$177 Roundtrip, found 6 days ago

$177

Roundtrip

found 6 days ago

Select United flight, departing Tue, Jul 15 from Denver Intl. to Sky Harbor Intl., returning Sun, Jul 20, priced at $177 found 6 days ago

Tue, Jul 15 - Sun, Jul 20

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$177 Roundtrip, found 6 days ago

$177

Roundtrip

found 6 days ago

Select American Airlines flight, departing Tue, Jul 15 from Denver Intl. to Sky Harbor Intl., returning Sun, Jul 20, priced at $177 found 6 days ago

Tue, Jul 15 - Sun, Jul 20

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$207 Roundtrip, found 6 days ago

$207

Roundtrip

found 6 days ago

Select Delta flight, departing Tue, Jul 15 from Denver Intl. to Sky Harbor Intl., returning Sun, Jul 20, priced at $207 found 6 days ago

Thu, Jul 24 - Sun, Jul 27

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$509 Roundtrip, found 2 days ago

$509

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Thu, Jul 24 from Denver Intl. to Sky Harbor Intl., returning Sun, Jul 27, priced at $509 found 2 days ago

Thu, Jul 24 - Sun, Jul 27

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$843 Roundtrip, found 2 days ago

$843

Roundtrip

found 2 days ago

Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Thu, Jul 24 from Denver Intl. to Sky Harbor Intl., returning Sun, Jul 27, priced at $843 found 2 days ago