$71 Cheap Frontier Airlines flights San Francisco (SFO) to Ontario Intl. Airport (ONT)

$71 Cheap Frontier Airlines flights San Francisco (SFO) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at $71 for one-way flights and $92 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 14 - Thu, Jul 16

SFO

San Francisco

ONT

Ontario

$92 Roundtrip, found 5 days ago

$92

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Tue, Jul 14 from San Francisco to Ontario, returning Thu, Jul 16, priced at $92 found 5 days ago

Tue, Jun 30 - Wed, Jul 15

SFO

San Francisco

ONT

Ontario

$104 Roundtrip, found 1 hour ago

$104

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Tue, Jun 30 from San Francisco to Ontario, returning Wed, Jul 15, priced at $104 found 1 hour ago

Mon, Jul 13 - Tue, Jul 21

SFO

San Francisco

ONT

Ontario

$107 Roundtrip, found 5 days ago

$107

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Jul 13 from San Francisco to Ontario, returning Tue, Jul 21, priced at $107 found 5 days ago

Tue, Jun 9 - Fri, Jun 12

SFO

San Francisco

ONT

Ontario

$117 Roundtrip, found 6 days ago

$117

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Jun 9 from San Francisco to Ontario, returning Fri, Jun 12, priced at $117 found 6 days ago

Wed, Jun 3 - Thu, Jun 11

SFO

San Francisco

ONT

Ontario

$119 Roundtrip, found 6 days ago

$119

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Jun 3 from San Francisco to Ontario, returning Thu, Jun 11, priced at $119 found 6 days ago

Fri, Jul 10 - Tue, Jul 21

SFO

San Francisco

ONT

Ontario

$122 Roundtrip, found 5 days ago

$122

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Jul 10 from San Francisco to Ontario, returning Tue, Jul 21, priced at $122 found 5 days ago