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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 March , April 2026

31 Mar - 06 Apr $ 197.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates
09 Mar - 07 Apr $ 291.00
ONT
Ontario
Hawaiian Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Hawaiian Airlines
1 STOPS
ONT
Ontario
Pick dates
09 Mar - 07 Apr $ 336.00
ONT
Ontario
Hawaiian Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Hawaiian Airlines
1 STOPS
ONT
Ontario
Pick dates

Last minute flights from Ontario to San Francisco

31 Mar - 31 Mar $ 213.00
ONT
Ontario
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
ONT
Ontario
Pick dates
10 Mar - 31 Mar $ 289.00
ONT
Ontario
Hawaiian Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Hawaiian Airlines
1 STOPS
ONT
Ontario
Pick dates
01 Mar - 31 Mar $ 437.00
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

9:06 AM - 9:06 AM
Frontier Airlines
0 Stops
1h 42m
ONT - SFO
$ 59
Kiwi
Pick dates
9:06 AM - 9:06 AM
Frontier Airlines
0 Stops
1h 42m
ONT - SFO
$ 105
Kiwi
Pick dates
6:15 AM - 6:15 AM
United Airlines
0 Stops
1h 33m
ONT - SFO
$ 232
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.