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

Fri, Oct 23 - Fri, Oct 30

SFO

San Francisco Intl.

ONT

Ontario Intl. Airport

$91 Roundtrip, just found

$91

Roundtrip

just found

Select Frontier Airlines flight, departing Fri, Oct 23 from San Francisco Intl. to Ontario Intl. Airport, returning Fri, Oct 30, priced at $91 just found

Thu, Oct 22 - Mon, Nov 2

SEA

Seattle - Tacoma Intl.

ONT

Ontario Intl. Airport

$96 Roundtrip, found 8 hours ago

$96

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Thu, Oct 22 from Seattle - Tacoma Intl. to Ontario Intl. Airport, returning Mon, Nov 2, priced at $96 found 8 hours ago

Tue, Nov 3 - Tue, Nov 17

DFW

Dallas-Fort Worth Intl.

ONT

Ontario Intl. Airport

$120 Roundtrip, found 8 hours ago

$120

Roundtrip

found 8 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 $120 found 8 hours ago

Wed, Oct 14 - Fri, Nov 6

PHX

Sky Harbor Intl.

ONT

Ontario Intl. Airport

$134 Roundtrip, found 5 days ago

$134

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Oct 14 from Sky Harbor Intl. to Ontario Intl. Airport, returning Fri, Nov 6, priced at $134 found 5 days ago