Southwest® flights from San Francisco to Ontario/LA from $76

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Low fares from San Francisco to Ontario/LA

$

San Francisco (SFO)to

Ontario/LA (ONT)
Depart: 12/17/2026

One-way

Basic

From
$76
Seen: 23 hrs ago

San Francisco (SFO)to

Ontario/LA (ONT)
Depart: 10/28/2026

One-way

Basic

From
$76
Seen: 5 hrs ago

San Francisco (SFO)to

Ontario/LA (ONT)
Depart: 10/31/2026

One-way

Basic

From
$76
Seen: 1 hour ago

San Francisco (SFO)to

Ontario/LA (ONT)
Depart: 11/02/2026

One-way

Basic

From
$76
Seen: 18 minutes ago

San Francisco (SFO)to

Ontario/LA (ONT)
Depart: 11/07/2026

One-way

Basic

From
$76
Seen: 18 hrs ago

San Francisco (SFO)to

Ontario/LA (ONT)
Depart: 11/03/2026

One-way

Basic

From
$76
Seen: 12 hrs ago

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Explore flights from San Francisco to Ontario/LA

Oct 2026
From$76*
Seen: 5 hrs ago
One Way/Basic
Nov 2026
From$76*
Seen: 18 hrs ago
One Way/Basic
Dec 2026
From$76*
Seen: 16 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $76
cmp-daily-histogram-bars-legend-max-price-aria-label $418
Displaying fares for October-2026
  • SFO–ONT, 10/01/2026: From $418
    01

    Thu

    OCT

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

    Fri

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    03

    Sat

  • SFO–ONT, 10/04/2026: From $418
    04

    Sun

  • SFO–ONT, 10/05/2026: From $418
    05

    Mon

  • SFO–ONT, 10/06/2026: From $418
    06

    Tue

  • SFO–ONT, 10/07/2026: From $170
    07

    Wed

  • SFO–ONT, 10/08/2026: From $190
    08

    Thu

  • SFO–ONT, 10/09/2026: From $214
    09

    Fri

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    10

    Sat

  • SFO–ONT, 10/11/2026: From $209
    11

    Sun

  • SFO–ONT, 10/12/2026: From $190
    12

    Mon

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    13

    Tue

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    14

    Wed

  • SFO–ONT, 10/15/2026: From $150
    15

    Thu

  • SFO–ONT, 10/16/2026: From $155
    16

    Fri

  • SFO–ONT, 10/17/2026: From $130
    17

    Sat

  • SFO–ONT, 10/18/2026: From $209
    18

    Sun

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    19

    Mon

  • SFO–ONT, 10/20/2026: From $130
    20

    Tue

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    21

    Wed

  • SFO–ONT, 10/22/2026: From $169
    22

    Thu

  • SFO–ONT, 10/23/2026: From $101
    23

    Fri

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    24

    Sat

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    25

    Sun

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    26

    Mon

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    27

    Tue

  • SFO–ONT, 10/28/2026: From $76
    28

    Wed

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    29

    Thu

  • SFO–ONT, 10/30/2026: From $90
    30

    Fri

  • SFO–ONT, 10/31/2026: From $76
    31

    Sat

    • Range$76-$418

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    San Francisco International Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    363 miles

    Route Information

    87† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 87 weekly flights from San Francisco to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly San Francisco to Ontario/LA with Southwest, check out our Low Fare Calendar.
    You can rent a car at LA/Ontario International Airport book yours with your flight.
    Yes! Flights from San Francisco to Ontario/LA—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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