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

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

Prices were available within the past 7 days and start at for one-way flights and $96 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Sep 29 - Fri, Oct 3

SFO

San Francisco

ONT

Ontario

$96 Roundtrip, found 3 days ago

$96

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Sep 29 from San Francisco to Ontario, returning Fri, Oct 3, priced at $96 found 3 days ago

Mon, Sep 29 - Mon, Oct 6

SFO

San Francisco

ONT

Ontario

$111 Roundtrip, found 3 days ago

$111

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Sep 29 from San Francisco to Ontario, returning Mon, Oct 6, priced at $111 found 3 days ago

Thu, Oct 2 - Mon, Oct 6

SFO

San Francisco

ONT

Ontario

$116 Roundtrip, found 1 day ago

$116

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 2 from San Francisco to Ontario, returning Mon, Oct 6, priced at $116 found 1 day ago

Fri, Oct 3 - Mon, Oct 6

SFO

San Francisco

ONT

Ontario

$121 Roundtrip, found 3 days ago

$121

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Oct 3 from San Francisco to Ontario, returning Mon, Oct 6, priced at $121 found 3 days ago

Mon, Sep 29 - Thu, Oct 2

SFO

San Francisco

ONT

Ontario

$136 Roundtrip, found 1 day ago

$136

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Sep 29 from San Francisco to Ontario, returning Thu, Oct 2, priced at $136 found 1 day ago

Thu, Oct 2 - Fri, Oct 3

SFO

San Francisco

ONT

Ontario

$159 Roundtrip, found 1 day ago

$159

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 2 from San Francisco to Ontario, returning Fri, Oct 3, priced at $159 found 1 day ago

Mon, Sep 29 - Sun, Oct 5

SFO

San Francisco

ONT

Ontario

$192 Roundtrip, found 3 days ago

$192

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Sep 29 from San Francisco to Ontario, returning Sun, Oct 5, priced at $192 found 3 days ago

Fri, Oct 3 - Sun, Oct 5

SFO

San Francisco

ONT

Ontario

$202 Roundtrip, found 3 days ago

$202

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Oct 3 from San Francisco to Ontario, returning Sun, Oct 5, priced at $202 found 3 days ago

Thu, Oct 2 - Sun, Oct 5

SFO

San Francisco

ONT

Ontario

$227 Roundtrip, found 1 day ago

$227

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Oct 2 from San Francisco to Ontario, returning Sun, Oct 5, priced at $227 found 1 day ago