$34 Cheap Frontier Airlines flights San Francisco (SFO) to Ontario (ONT)

$34 Cheap Frontier Airlines flights San Francisco (SFO) to Ontario (ONT)

Prices were available within the past 7 days and start at $34 for one-way flights and $82 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Dec 14 - Mon, Dec 15

SFO

San Francisco

ONT

Ontario

$82 Roundtrip, found 1 day ago

$82

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Dec 14 from San Francisco to Ontario, returning Mon, Dec 15, priced at $82 found 1 day ago

Fri, Dec 12 - Mon, Dec 15

SFO

San Francisco

ONT

Ontario

$95 Roundtrip, found 1 day ago

$95

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Dec 12 from San Francisco to Ontario, returning Mon, Dec 15, priced at $95 found 1 day ago

Fri, Dec 12 - Tue, Dec 16

SFO

San Francisco

ONT

Ontario

$100 Roundtrip, found 1 day ago

$100

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Dec 12 from San Francisco to Ontario, returning Tue, Dec 16, priced at $100 found 1 day ago

Sun, Dec 14 - Fri, Dec 19

SFO

San Francisco

ONT

Ontario

$102 Roundtrip, found 1 day ago

$102

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Dec 14 from San Francisco to Ontario, returning Fri, Dec 19, priced at $102 found 1 day ago

Fri, Dec 12 - Fri, Dec 19

SFO

San Francisco

ONT

Ontario

$115 Roundtrip, found 1 day ago

$115

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Dec 12 from San Francisco to Ontario, returning Fri, Dec 19, priced at $115 found 1 day ago

Thu, Dec 11 - Sun, Dec 14

SFO

San Francisco

ONT

Ontario

$117 Roundtrip, found 1 day ago

$117

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Dec 11 from San Francisco to Ontario, returning Sun, Dec 14, priced at $117 found 1 day ago