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

Promo Code

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

Aug 2026
from$60*
Last seen: 19 hours ago
One-way/Economy
Sep 2026
from$22*
Last seen: 2 hours ago
One-way/Economy
Oct 2026
from$22*
Last seen: 9 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $22
cmp-daily-histogram-bars-legend-max-price-aria-label $179
Displaying fares for August-2026
  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    15

    Sat

    AUG

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

    Sun

  • ONT–SFO, Aug 17, 2026: from $179
    17

    Mon

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

    Tue

  • ONT–SFO, Aug 19, 2026: from $179
    19

    Wed

  • ONT–SFO, Aug 20, 2026: from $179
    20

    Thu

  • ONT–SFO, Aug 21, 2026: from $161
    21

    Fri

  • ONT–SFO, Aug 22, 2026: from $149
    22

    Sat

  • ONT–SFO, Aug 23, 2026: from $161
    23

    Sun

  • ONT–SFO, Aug 24, 2026: from $161
    24

    Mon

  • ONT–SFO, Aug 25, 2026: from $149
    25

    Tue

  • ONT–SFO, Aug 26, 2026: from $149
    26

    Wed

  • ONT–SFO, Aug 27, 2026: from $149
    27

    Thu

  • ONT–SFO, Aug 28, 2026: from $149
    28

    Fri

  • ONT–SFO, Aug 29, 2026: from $119
    29

    Sat

  • ONT–SFO, Aug 30, 2026: from $154
    30

    Sun

  • ONT–SFO, Aug 31, 2026: from $60
    31

    Mon

  • ONT–SFO, Sep 1, 2026: from $27
    01

    Tue

    SEP

  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    02

    Wed

  • ONT–SFO, Sep 3, 2026: from $149
    03

    Thu

  • ONT–SFO, Sep 4, 2026: from $60
    04

    Fri

  • ONT–SFO, Sep 5, 2026: from $65
    05

    Sat

  • ONT–SFO, Sep 6, 2026: from $114
    06

    Sun

  • ONT–SFO, Sep 7, 2026: from $98
    07

    Mon

  • ONT–SFO, Sep 8, 2026: from $26
    08

    Tue

  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    10

    Thu

  • ONT–SFO, Sep 11, 2026: from $29
    11

    Fri

  • ONT–SFO, Sep 12, 2026: from $66
    12

    Sat

  • ONT–SFO, Sep 13, 2026: from $114
    13

    Sun

  • ONT–SFO, Sep 14, 2026: from $22
    14

    Mon

    • Range$22-$179

    *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 Dec 10, 2026

    From

    $42

    Last seen: 7 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

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