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Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Tue, Dec 1 - Wed, Dec 16

SFO

San Francisco Intl.

ONT

Ontario Intl. Airport

$38 Roundtrip, just found

$38

Roundtrip

just found

Select Frontier Airlines flight, departing Tue, Dec 1 from San Francisco Intl. to Ontario Intl. Airport, returning Wed, Dec 16, priced at $38 just found

Thu, Dec 3 - Tue, Dec 15

DEN

Denver Intl.

ONT

Ontario Intl. Airport

$47 Roundtrip, just found

$47

Roundtrip

just found

Select Frontier Airlines flight, departing Thu, Dec 3 from Denver Intl. to Ontario Intl. Airport, returning Tue, Dec 15, priced at $47 just found

Sat, Dec 12 - Wed, Dec 16

PHX

Sky Harbor Intl.

ONT

Ontario Intl. Airport

$114 Roundtrip, found 1 hour ago

$114

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Sat, Dec 12 from Sky Harbor Intl. to Ontario Intl. Airport, returning Wed, Dec 16, priced at $114 found 1 hour ago

Sat, Dec 5 - Tue, Dec 15

DFW

Dallas-Fort Worth Intl.

ONT

Ontario Intl. Airport

$118 Roundtrip, found 8 hours ago

$118

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sat, Dec 5 from Dallas-Fort Worth Intl. to Ontario Intl. Airport, returning Tue, Dec 15, priced at $118 found 8 hours ago