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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 November , December 2025

24 Nov - 07 Dec $ 96.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
Pick dates
24 Nov - 08 Dec $ 100.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
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17 Nov - 04 Dec $ 178.00
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

24 Nov - 30 Nov $ 209.00
ONT
Ontario
Frontier Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
Pick dates
26 Nov - 30 Nov $ 255.00
ONT
Ontario
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
DIRECT
ONT
Ontario
Pick dates
19 Nov - 30 Nov $ 452.00
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

9:59 PM - 9:59 PM
Frontier Airlines
0 Stops
1h 30m
ONT - SFO
$ 69
Kiwi
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12:58 AM - 6:05 AM
Frontier Airlines
1 Stops
7h 10m
ONT - SFO
$ 118
Kiwi
Pick dates
6:00 AM - 6:00 AM
United Airlines
0 Stops
1h 24m
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.