Southwest® flights from Santa Rosa to Ontario/LA from $94

Promo Code

Low fares from Santa Rosa to Ontario/LA

$

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 01/19/2027

One-way

Basic

From
$94

Low fares from Santa Rosa to Ontario/LA

$

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 01/19/2027

One-way

Basic

From
$94
Seen: 18 hrs ago

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 02/06/2027

One-way

Basic

From
$94
Seen: 20 hrs ago

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 01/12/2027

One-way

Basic

From
$94
Seen: 16 hrs ago

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 02/05/2027

One-way

Basic

From
$104
Seen: 20 hrs ago

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 01/11/2027

One-way

Basic

From
$104
Seen: 12 hrs ago

Santa Rosa (STS)to

Ontario/LA (ONT)
Depart: 02/06/2027

One-way

Choice

From
$124
Seen: 20 hrs ago

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Explore flights from Santa Rosa to Ontario/LA

Nov 2026
From$290*
Seen: 14 hrs ago
One Way/Basic
Dec 2026
From$168*
Seen: 6 hrs ago
One Way/Basic
Jan 2027
From$94*
Seen: 16 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $193
cmp-daily-histogram-bars-legend-max-price-aria-label $435
Displaying fares for November-2026
  • STS–ONT, 11/11/2026: From $435
    11

    Wed

    NOV

  • STS–ONT, 11/12/2026: From $430
    12

    Thu

  • STS–ONT, 11/13/2026: From $430
    13

    Fri

  • STS–ONT, 11/14/2026: From $435
    14

    Sat

  • STS–ONT: cmp-view-offers-disclaimer. Find Offers
    15

    Sun

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    16

    Mon

  • STS–ONT, 11/17/2026: From $355
    17

    Tue

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    18

    Wed

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    19

    Thu

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    20

    Fri

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    21

    Sat

  • STS–ONT, 11/22/2026: From $350
    22

    Sun

  • STS–ONT, 11/23/2026: From $350
    23

    Mon

  • STS–ONT: cmp-view-offers-disclaimer. Find Offers
    24

    Tue

  • STS–ONT, 11/25/2026: From $290
    25

    Wed

  • STS–ONT, 11/26/2026: From $290
    26

    Thu

  • STS–ONT: cmp-view-offers-disclaimer. Find Offers
    27

    Fri

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

    Sat

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    29

    Sun

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    30

    Mon

  • STS–ONT, 12/01/2026: From $193
    01

    Tue

    DEC

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    02

    Wed

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    03

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    04

    Fri

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    05

    Sat

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    06

    Sun

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    07

    Mon

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    08

    Tue

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    09

    Wed

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    10

    Thu

    • Range$193-$435

    *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:
    Charles M. Schulz–Sonoma County Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    423 miles

    Questions we hear the most

    There are 27 weekly flights from Santa Rosa to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Santa Rosa 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 Santa Rosa 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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