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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 January , February 2026

29 Jan - 04 Feb $ 139.00
ONT
Ontario
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
21 Jan - 04 Feb $ 151.00
ONT
Ontario
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
16 Jan - 04 Feb $ 209.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
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Last minute flights from Ontario to San Francisco

21 Jan - 01 Feb $ 168.00
ONT
Ontario
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
29 Jan - 31 Jan $ 176.00
ONT
Ontario
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
ONT
Ontario
Pick dates
18 Jan - 31 Jan $ 472.00
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

3:22 PM - 5:35 PM
Frontier Airlines
1 Stops
4h 6m
ONT - SFO
$ 75
Kiwi
Pick dates
3:07 PM - 8:45 AM
Frontier Airlines
1 Stops
19h 31m
ONT - SFO
$ 87
Kiwi
Pick dates
6:39 PM - 6:39 PM
United Airlines
0 Stops
1h 31m
ONT - SFO
$ 328
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.