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

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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 October , November 2026

29 Oct - 16 Nov $ 122.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
Pick dates
26 Oct - 09 Nov $ 157.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
Pick dates
26 Oct - 05 Nov $ 191.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
Pick dates

Last minute flights from Ontario to San Francisco

29 Oct - 31 Oct $ 219.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
26 Oct - 31 Oct $ 253.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
23 Oct - 31 Oct $ 603.00
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

12:01 PM - 12:01 PM
Frontier Airlines
0 Stops
1h 35m
ONT - SFO
$ 70
Kiwi
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12:01 PM - 12:01 PM
Frontier Airlines
0 Stops
1h 31m
ONT - SFO
$ 105
Kiwi
Pick dates
6:07 AM - 6:07 AM
United Airlines
0 Stops
1h 26m
ONT - SFO
$ 430
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.