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

Mon, Oct 19 - Thu, Oct 22

SFO

San Francisco Intl.

ONT

Ontario Intl. Airport

$63 Roundtrip, found 6 hours ago

$63

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Mon, Oct 19 from San Francisco Intl. to Ontario Intl. Airport, returning Thu, Oct 22, priced at $63 found 6 hours ago

Wed, Oct 28 - Sat, Nov 14

DEN

Denver Intl.

ONT

Ontario Intl. Airport

$66 Roundtrip, found 12 hours ago

$66

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Wed, Oct 28 from Denver Intl. to Ontario Intl. Airport, returning Sat, Nov 14, priced at $66 found 12 hours ago

Tue, Nov 3 - Tue, Nov 17

DFW

Dallas-Fort Worth Intl.

ONT

Ontario Intl. Airport

$77 Roundtrip, found 11 hours ago

$77

Roundtrip

found 11 hours ago

Select Frontier Airlines flight, departing Tue, Nov 3 from Dallas-Fort Worth Intl. to Ontario Intl. Airport, returning Tue, Nov 17, priced at $77 found 11 hours ago

Tue, Nov 3 - Mon, Nov 16

PHX

Sky Harbor Intl.

ONT

Ontario Intl. Airport

$112 Roundtrip, found 13 hours ago

$112

Roundtrip

found 13 hours ago

Select Frontier Airlines flight, departing Tue, Nov 3 from Sky Harbor Intl. to Ontario Intl. Airport, returning Mon, Nov 16, priced at $112 found 13 hours ago