$29 Cheap United flights San Francisco (SFO) to Ontario (ONT)

$29 Cheap United flights San Francisco (SFO) to Ontario (ONT)

Prices were available within the past 7 days and start at $29 for one-way flights and $57 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 14 - Thu, May 15

SFO

San Francisco

ONT

Ontario

$57 Roundtrip, found 17 hours ago

$57

Roundtrip

found 17 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Ontario, returning Thu, May 15, priced at $57 found 17 hours ago

Wed, May 14 - Thu, May 15

SFO

San Francisco

ONT

Ontario

$91 Roundtrip, found 17 hours ago

$91

Roundtrip

found 17 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Ontario, returning Thu, May 15, priced at $91 found 17 hours ago

Wed, May 14 - Thu, May 15

SFO

San Francisco

ONT

Ontario

$98 Roundtrip, found 17 hours ago

$98

Roundtrip

found 17 hours ago

Select United flight, departing Wed, May 14 from San Francisco to Ontario, returning Thu, May 15, priced at $98 found 17 hours ago

Tue, May 13 - Tue, May 13

SFO

San Francisco

ONT

Ontario

$112 Roundtrip, found 5 days ago

$112

Roundtrip

found 5 days ago

Select United flight, departing Tue, May 13 from San Francisco to Ontario, returning Tue, May 13, priced at $112 found 5 days ago

Tue, May 27 - Tue, Jun 3

SFO

San Francisco

ONT

Ontario

$117 Roundtrip, found 14 hours ago

$117

Roundtrip

found 14 hours ago

Select United flight, departing Tue, May 27 from San Francisco to Ontario, returning Tue, Jun 3, priced at $117 found 14 hours ago

Tue, May 6 - Sat, May 10

SFO

San Francisco

ONT

Ontario

$127 Roundtrip, found 5 days ago

$127

Roundtrip

found 5 days ago

Select United flight, departing Tue, May 6 from San Francisco to Ontario, returning Sat, May 10, priced at $127 found 5 days ago