$33 Cheap Frontier Airlines flights Ontario Intl. Airport (ONT) to San Francisco (SFO)

$33 Cheap Frontier Airlines flights Ontario Intl. Airport (ONT) to San Francisco (SFO)

Prices were available within the past 7 days and start at $33 for one-way flights and $81 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 9 - Wed, Jun 17

ONT

Ontario

SFO

San Francisco

$81 Roundtrip, found 2 days ago

$81

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jun 9 from Ontario to San Francisco, returning Wed, Jun 17, priced at $81 found 2 days ago

Tue, Jun 9 - Thu, Jun 18

ONT

Ontario

SFO

San Francisco

$92 Roundtrip, found 2 days ago

$92

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jun 9 from Ontario to San Francisco, returning Thu, Jun 18, priced at $92 found 2 days ago

Wed, Jun 10 - Mon, Jun 22

ONT

Ontario

SFO

San Francisco

$104 Roundtrip, found 2 days ago

$104

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Jun 10 from Ontario to San Francisco, returning Mon, Jun 22, priced at $104 found 2 days ago

Thu, Jun 11 - Wed, Jun 17

ONT

Ontario

SFO

San Francisco

$107 Roundtrip, found 2 days ago

$107

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Jun 11 from Ontario to San Francisco, returning Wed, Jun 17, priced at $107 found 2 days ago

Thu, Jun 11 - Thu, Jun 18

ONT

Ontario

SFO

San Francisco

$118 Roundtrip, found 2 days ago

$118

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Jun 11 from Ontario to San Francisco, returning Thu, Jun 18, priced at $118 found 2 days ago

Thu, Jun 11 - Mon, Jun 22

ONT

Ontario

SFO

San Francisco

$130 Roundtrip, found 2 days ago

$130

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Jun 11 from Ontario to San Francisco, returning Mon, Jun 22, priced at $130 found 2 days ago