Southwest® flights from Ontario/LA to Jacksonville from $140

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Low fares from Ontario/LA to Jacksonville

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Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 11/18/2026

One-way

Basic

From
$140
Seen: 22 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 12/03/2026

One-way

Basic

From
$140
Seen: 7 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 11/17/2026

One-way

Basic

From
$140
Seen: 19 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 12/02/2026

One-way

Basic

From
$140
Seen: 14 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 11/26/2026

One-way

Basic

From
$162
Seen: 18 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 12/25/2026

One-way

Basic

From
$169
Seen: 6 hrs ago

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Explore flights from Ontario/LA to Jacksonville

Oct 2026
From$311*
Seen: 3 hrs ago
One Way/Basic
Nov 2026
From$140*
Seen: 22 hrs ago
One Way/Basic
Dec 2026
From$140*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $140
cmp-daily-histogram-bars-legend-max-price-aria-label $402
Displaying fares for October-2026
  • ONT–JAX, 10/23/2026: From $402
    23

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    OCT

  • ONT–JAX, 10/24/2026: From $311
    24

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    25

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    27

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    28

    Wed

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    29

    Thu

  • ONT–JAX, 10/30/2026: From $391
    30

    Fri

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    31

    Sat

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    Sun

    NOV

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    02

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    03

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    04

    Wed

  • ONT–JAX, 11/05/2026: From $324
    05

    Thu

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    06

    Fri

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    07

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    08

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  • ONT–JAX, 11/09/2026: From $324
    09

    Mon

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    10

    Tue

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    11

    Wed

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    12

    Thu

  • ONT–JAX, 11/13/2026: From $232
    13

    Fri

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    14

    Sat

  • ONT–JAX, 11/15/2026: From $284
    15

    Sun

  • ONT–JAX, 11/16/2026: From $300
    16

    Mon

  • ONT–JAX, 11/17/2026: From $140
    17

    Tue

  • ONT–JAX, 11/18/2026: From $140
    18

    Wed

  • ONT–JAX, 11/19/2026: From $284
    19

    Thu

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    20

    Fri

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    21

    Sat

  • ONT–JAX, 11/22/2026: From $254
    22

    Sun

    • Range$140-$402

    *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:
    LA/Ontario International Airport
    Arriving at:
    Jacksonville International Airport
    Distance:
    2106 miles

    Questions we hear the most

    There are 72 weekly flights from Ontario/LA to Jacksonville on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Jacksonville with Southwest, check out our Low Fare Calendar.
    You can rent a car at Jacksonville International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Jacksonville—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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