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

Fri, Dec 4 - Mon, Dec 7

SFO

San Francisco Intl.

ONT

Ontario Intl. Airport

$68 Roundtrip, found 1 day ago

$68

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Dec 4 from San Francisco Intl. to Ontario Intl. Airport, returning Mon, Dec 7, priced at $68 found 1 day ago

Sat, Nov 7 - Mon, Nov 16

PHX

Sky Harbor Intl.

ONT

Ontario Intl. Airport

$133 Roundtrip, found 5 days ago

$133

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sat, Nov 7 from Sky Harbor Intl. to Ontario Intl. Airport, returning Mon, Nov 16, priced at $133 found 5 days ago

Wed, Dec 2 - Sat, Dec 12

SEA

Seattle - Tacoma Intl.

ONT

Ontario Intl. Airport

$147 Roundtrip, found 3 hours ago

$147

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Wed, Dec 2 from Seattle - Tacoma Intl. to Ontario Intl. Airport, returning Sat, Dec 12, priced at $147 found 3 hours ago

Mon, Oct 26 - Fri, Nov 13

DEN

Denver Intl.

ONT

Ontario Intl. Airport

$147 Roundtrip, found 6 days ago

$147

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Oct 26 from Denver Intl. to Ontario Intl. Airport, returning Fri, Nov 13, priced at $147 found 6 days ago