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, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$108 Roundtrip, found 14 hours ago

$108

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $108 found 14 hours ago

Sun, Sep 14 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$110 Roundtrip, found 14 hours ago

$110

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $110 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$113 Roundtrip, found 14 hours ago

$113

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $113 found 14 hours ago

Sun, Sep 14 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$115 Roundtrip, found 14 hours ago

$115

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $115 found 14 hours ago

Sun, Sep 14 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$120 Roundtrip, found 14 hours ago

$120

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $120 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$145 Roundtrip, found 14 hours ago

$145

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $145 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$150 Roundtrip, found 14 hours ago

$150

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $150 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$157 Roundtrip, found 14 hours ago

$157

Roundtrip

found 14 hours ago

Select United flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $157 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$157 Roundtrip, found 14 hours ago

$157

Roundtrip

found 14 hours ago

Select American Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $157 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$159 Roundtrip, found 14 hours ago

$159

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $159 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$159 Roundtrip, found 14 hours ago

$159

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $159 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$161 Roundtrip, found 14 hours ago

$161

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $161 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$164 Roundtrip, found 14 hours ago

$164

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $164 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$165 Roundtrip, found 14 hours ago

$165

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $165 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$166 Roundtrip, found 14 hours ago

$166

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $166 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$167 Roundtrip, found 14 hours ago

$167

Roundtrip

found 14 hours ago

Select United flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $167 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$168 Roundtrip, found 14 hours ago

$168

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $168 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$197 Roundtrip, found 14 hours ago

$197

Roundtrip

found 14 hours ago

Select Delta flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $197 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$392 Roundtrip, found 14 hours ago

$392

Roundtrip

found 14 hours ago

Select Alaska Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $392 found 14 hours ago

Sat, Sep 13 - Sun, Sep 21

DEN

Denver Intl.

PHX

Sky Harbor Intl.

$467 Roundtrip, found 14 hours ago

$467

Roundtrip

found 14 hours ago

Select Contour Airlines flight, departing Sat, Sep 13 from Denver Intl. to Sky Harbor Intl., returning Sun, Sep 21, priced at $467 found 14 hours ago