Flights from Boulder to Carlsbad

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 20 - Sat, Sep 27

DEN

Denver Intl.

SAN

San Diego Intl.

$148 Roundtrip, found 15 hours ago

$148

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sat, Sep 20 from Denver Intl. to San Diego Intl., returning Sat, Sep 27, priced at $148 found 15 hours ago

Sat, Sep 20 - Mon, Sep 29

DEN

Denver Intl.

SAN

San Diego Intl.

$168 Roundtrip, found 15 hours ago

$168

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sat, Sep 20 from Denver Intl. to San Diego Intl., returning Mon, Sep 29, priced at $168 found 15 hours ago

Sat, Sep 20 - Sun, Sep 28

DEN

Denver Intl.

SAN

San Diego Intl.

$178 Roundtrip, found 15 hours ago

$178

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sat, Sep 20 from Denver Intl. to San Diego Intl., returning Sun, Sep 28, priced at $178 found 15 hours ago

Mon, Sep 22 - Mon, Sep 29

DEN

Denver Intl.

SAN

San Diego Intl.

$186 Roundtrip, found 15 hours ago

$186

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Mon, Sep 22 from Denver Intl. to San Diego Intl., returning Mon, Sep 29, priced at $186 found 15 hours ago

Sun, Sep 21 - Mon, Sep 29

DEN

Denver Intl.

SAN

San Diego Intl.

$196 Roundtrip, found 15 hours ago

$196

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Denver Intl. to San Diego Intl., returning Mon, Sep 29, priced at $196 found 15 hours ago

Sun, Sep 21 - Sun, Sep 28

DEN

Denver Intl.

SAN

San Diego Intl.

$206 Roundtrip, found 15 hours ago

$206

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sun, Sep 21 from Denver Intl. to San Diego Intl., returning Sun, Sep 28, priced at $206 found 15 hours ago