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

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

Try alternate month or interact with individual days below in order to find offers.
Aug 2026
No results for this month.
Sep 2026
from$33*
Last seen: 1 hour ago
One-way/Economy
Oct 2026
from$58*
Last seen: 15 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $33
cmp-daily-histogram-bars-legend-max-price-aria-label $149
Displaying fares for August-2026
  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    30

    Sun

    AUG

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

  • SFO–ONT, Sep 1, 2026: from $39
    01

    Tue

    SEP

  • SFO–ONT, Sep 2, 2026: from $39
    02

    Wed

  • SFO–ONT, Sep 3, 2026: from $39
    03

    Thu

  • SFO–ONT, Sep 4, 2026: from $112
    04

    Fri

  • SFO–ONT, Sep 5, 2026: from $128
    05

    Sat

  • SFO–ONT, Sep 6, 2026: from $98
    06

    Sun

  • SFO–ONT, Sep 7, 2026: from $128
    07

    Mon

  • SFO–ONT, Sep 8, 2026: from $33
    08

    Tue

  • SFO–ONT, Sep 9, 2026: from $149
    09

    Wed

  • SFO–ONT, Sep 10, 2026: from $33
    10

    Thu

  • SFO–ONT, Sep 11, 2026: from $33
    11

    Fri

  • SFO–ONT, Sep 12, 2026: from $149
    12

    Sat

  • SFO–ONT, Sep 13, 2026: from $78
    13

    Sun

  • SFO–ONT, Sep 14, 2026: from $78
    14

    Mon

  • SFO–ONT, Sep 15, 2026: from $109
    15

    Tue

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

  • SFO–ONT, Sep 17, 2026: from $78
    17

    Thu

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    18

    Fri

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • SFO–ONT, Sep 20, 2026: from $83
    20

    Sun

  • SFO–ONT, Sep 21, 2026: from $64
    21

    Mon

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

  • SFO–ONT, Sep 23, 2026: from $58
    23

    Wed

  • SFO–ONT, Sep 24, 2026: from $58
    24

    Thu

  • SFO–ONT, Sep 25, 2026: from $75
    25

    Fri

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    26

    Sat

  • SFO–ONT, Sep 27, 2026: from $83
    27

    Sun

  • SFO–ONT: cmp-view-offers-disclaimer. Find Offers
    28

    Mon

  • SFO–ONT, Sep 29, 2026: from $58
    29

    Tue

    • Range$33-$149

    *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 San Francisco, CA to Ontario/LA, CA on Frontier

    $
    Flights Deals from San Francisco, CA to Ontario/LA, CA on Frontier
    From
    To
    San Francisco, CA (SFO)Ontario/LA, CA (ONT)One-way
    /
    Discount Den Basic Fare    		Departing Dec 13, 2026

    From

    $117

    Last seen: 22 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®.

    San Francisco, CA Ontario/LA, CA

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