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

Thu, Aug 20 - Mon, Aug 31

SFO

San Francisco Intl.

ONT

Ontario Intl. Airport

$46 Roundtrip, found 6 hours ago

$46

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Thu, Aug 20 from San Francisco Intl. to Ontario Intl. Airport, returning Mon, Aug 31, priced at $46 found 6 hours ago

Mon, Aug 24 - Sat, Sep 12

DEN

Denver Intl.

ONT

Ontario Intl. Airport

$76 Roundtrip, found 9 hours ago

$76

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, Aug 24 from Denver Intl. to Ontario Intl. Airport, returning Sat, Sep 12, priced at $76 found 9 hours ago

Thu, Aug 20 - Thu, Aug 20

SEA

Seattle - Tacoma Intl.

ONT

Ontario Intl. Airport

$90 Roundtrip, found 2 hours ago

$90

Roundtrip

found 2 hours ago

Select Frontier Airlines flight, departing Thu, Aug 20 from Seattle - Tacoma Intl. to Ontario Intl. Airport, returning Thu, Aug 20, priced at $90 found 2 hours ago

Mon, Nov 23 - Sat, Dec 12

PHX

Sky Harbor Intl.

ONT

Ontario Intl. Airport

$117 Roundtrip, found 3 hours ago

$117

Roundtrip

found 3 hours ago

Select American Airlines flight, departing Mon, Nov 23 from Sky Harbor Intl. to Ontario Intl. Airport, returning Sat, Dec 12, priced at $117 found 3 hours ago