Southwest® flights from Ontario/LA to Jacksonville from $189

Promo Code

Low fares from Ontario/LA to Jacksonville

$

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 10/29/2026

One-way

Basic

From
$189
Seen: 20 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 10/27/2026

One-way

Basic

From
$189
Seen: 19 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 11/04/2026

One-way

Basic

From
$189
Seen: 13 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 09/16/2026

One-way

Basic

From
$194
Seen: 7 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 09/10/2026

One-way

Basic

From
$206
Seen: 7 hrs ago

Ontario/LA (ONT)to

Jacksonville (JAX)
Depart: 10/23/2026

One-way

Basic

From
$207
Seen: 3 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Ontario/LA to Jacksonville

Aug 2026
From$291*
Seen: 5 hrs ago
One Way/Basic
Sep 2026
From$194*
Seen: 7 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 19 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $194
cmp-daily-histogram-bars-legend-max-price-aria-label $377
Displaying fares for August-2026
  • ONT–JAX, 08/23/2026: From $377
    23

    Sun

    AUG

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

    Mon

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    25

    Tue

  • ONT–JAX, 08/26/2026: From $291
    26

    Wed

  • ONT–JAX, 08/27/2026: From $371
    27

    Thu

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

    Fri

  • ONT–JAX, 08/29/2026: From $291
    29

    Sat

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

    Sun

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

  • ONT–JAX, 09/01/2026: From $291
    01

    Tue

    SEP

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

    Wed

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    03

    Thu

  • ONT–JAX, 09/04/2026: From $371
    04

    Fri

  • ONT–JAX, 09/05/2026: From $291
    05

    Sat

  • ONT–JAX, 09/06/2026: From $304
    06

    Sun

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

    Mon

  • ONT–JAX, 09/08/2026: From $329
    08

    Tue

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

    Wed

  • ONT–JAX, 09/10/2026: From $206
    10

    Thu

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

    Fri

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    12

    Sat

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • ONT–JAX, 09/14/2026: From $231
    14

    Mon

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

    Tue

  • ONT–JAX, 09/16/2026: From $194
    16

    Wed

  • ONT–JAX, 09/17/2026: From $226
    17

    Thu

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

    Fri

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • ONT–JAX: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

    • Range$194-$377

    *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

    Route Information

    72† 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 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.

    Explore Flights from Other Popular Origins

    Popular Flights from Ontario/LA