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Cheap flights from Ontario (ONT) to San Francisco (SFO)

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)

How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)
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How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)
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How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)
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Cheap flights from Ontario to San Francisco in September , October 2026

30 Sep - 26 Oct $ 272.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates
29 Sep - 20 Oct $ 272.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates
29 Sep - 19 Oct $ 299.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates

Last minute flights from Ontario to San Francisco

30 Sep - 30 Sep $ 332.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates
29 Sep - 30 Sep $ 337.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates
30 Sep - 30 Sep $ 803.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates

One-way flights to San Francisco from Ontario

1:52 PM - 1:52 PM
United Airlines
0 Stops
1h 29m
ONT - SFO
$ 129
Kiwi
Pick dates
11:10 AM - 11:10 AM
United Airlines
0 Stops
1h 33m
ONT - SFO
$ 129
Kiwi
Pick dates
8:03 AM - 8:03 AM
United Airlines
0 Stops
1h 27m
ONT - SFO
$ 408
Kiwi
Pick dates

How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)

Related info for your journey
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How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Ontario (ONT) to San Francisco (SFO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.