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.
Sep 2026
No results for this month.
Oct 2026
from$23*
Last seen: 7 hours ago
One-way/Economy
Nov 2026
from$23*
Last seen: 3 hours ago
One-way/Economy
cmp-daily-histogram-bars-legend-min-price-aria-label $23
cmp-daily-histogram-bars-legend-max-price-aria-label $220
Displaying fares for September-2026
  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    29

    Tue

    SEP

  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    30

    Wed

  • ONT–SFO, Oct 1, 2026: from $187
    01

    Thu

    OCT

  • ONT–SFO, Oct 2, 2026: from $187
    02

    Fri

  • ONT–SFO, Oct 3, 2026: from $214
    03

    Sat

  • ONT–SFO, Oct 4, 2026: from $146
    04

    Sun

  • ONT–SFO, Oct 5, 2026: from $85
    05

    Mon

  • ONT–SFO, Oct 6, 2026: from $211
    06

    Tue

  • ONT–SFO: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • ONT–SFO, Oct 8, 2026: from $42
    08

    Thu

  • ONT–SFO, Oct 9, 2026: from $146
    09

    Fri

  • ONT–SFO, Oct 10, 2026: from $214
    10

    Sat

  • ONT–SFO, Oct 11, 2026: from $60
    11

    Sun

  • ONT–SFO, Oct 12, 2026: from $168
    12

    Mon

  • ONT–SFO, Oct 13, 2026: from $209
    13

    Tue

  • ONT–SFO, Oct 14, 2026: from $159
    14

    Wed

  • ONT–SFO, Oct 15, 2026: from $89
    15

    Thu

  • ONT–SFO, Oct 16, 2026: from $89
    16

    Fri

  • ONT–SFO, Oct 17, 2026: from $220
    17

    Sat

  • ONT–SFO, Oct 18, 2026: from $146
    18

    Sun

  • ONT–SFO, Oct 19, 2026: from $56
    19

    Mon

  • ONT–SFO, Oct 20, 2026: from $50
    20

    Tue

  • ONT–SFO, Oct 21, 2026: from $50
    21

    Wed

  • ONT–SFO, Oct 22, 2026: from $23
    22

    Thu

  • ONT–SFO, Oct 23, 2026: from $50
    23

    Fri

  • ONT–SFO, Oct 24, 2026: from $50
    24

    Sat

  • ONT–SFO, Oct 25, 2026: from $112
    25

    Sun

  • ONT–SFO, Oct 26, 2026: from $39
    26

    Mon

  • ONT–SFO, Oct 27, 2026: from $50
    27

    Tue

  • ONT–SFO, Oct 28, 2026: from $50
    28

    Wed

    • Range$23-$220

    *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 Jan 1, 2027

    From

    $85

    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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