Flights from Ontario/LA, CA to San Francisco, CA

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Best Deals on Flights From Ontario/LA, CA (ONT) to San Francisco, CA (SFO)

Try alternate month or interact with individual days below in order to find offers.
Jun 2026
No results for this month.
Jul 2026
from$27*
Last seen: 1 hour ago
One-way/Economy
Aug 2026
from$27*
Last seen: 23 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $27
cmp-daily-histogram-bars-legend-max-price-aria-label $214
Displaying fares for June-2026
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    • Range$27-$214

    *Prices found by others in the previous 48 hours for round-trip flights. Prices shown may also require membership in our travel club, Discount Den.

    Flights Deals from Ontario/LA, CA to San Francisco, CA on Frontier

    $
    Flights Deals from Ontario/LA, CA to San Francisco, CA on Frontier
    From
    To
    Ontario/LA, CA (ONT)San Francisco, CA (SFO)One-way
    /
    Discount Den Basic Fare    		Departing Oct 29, 2026

    From

    $45

    Last seen: 13 hours ago

    *Prices found by others in the previous 48 hours for one-way flights. Prices shown may also require membership in our travel club, Discount Den®.

    Ontario/LA, CA San Francisco, CA

    Barclays Badge

    Earn 60,000 Miles after qualifying activity. Terms apply.