Southwest® flights from Jacksonville to Ontario/LA from $221

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Low fares from Jacksonville to Ontario/LA

$

Jacksonville (JAX)to

Ontario/LA (ONT)
Depart: 11/25/2026

One-way

Basic

From
$221
Seen: 23 hrs ago

Jacksonville (JAX)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Basic

From
$225
Seen: 21 hrs ago

Jacksonville (JAX)to

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

One-way

Basic

From
$225
Seen: 19 hrs ago

Jacksonville (JAX)to

Ontario/LA (ONT)
Depart: 11/08/2026

One-way

Basic

From
$244
Seen: 22 hrs ago

Jacksonville (JAX)to

Ontario/LA (ONT)
Depart: 11/26/2026

One-way

Basic

From
$244
Seen: 5 hrs ago

Jacksonville (JAX)to

Ontario/LA (ONT)
Depart: 12/13/2026

One-way

Basic

From
$244
Seen: 23 hrs ago

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Explore flights from Jacksonville to Ontario/LA

Oct 2026
From$225*
Seen: 19 hrs ago
One Way/Basic
Nov 2026
From$221*
Seen: 23 hrs ago
One Way/Basic
Dec 2026
From$244*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $225
cmp-daily-histogram-bars-legend-max-price-aria-label $381
Displaying fares for October-2026
  • JAX–ONT, 10/04/2026: From $381
    04

    Sun

    OCT

  • JAX–ONT: cmp-view-offers-disclaimer. Find Offers
    05

    Mon

  • JAX–ONT, 10/06/2026: From $301
    06

    Tue

  • JAX–ONT, 10/07/2026: From $301
    07

    Wed

  • JAX–ONT, 10/08/2026: From $381
    08

    Thu

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

    Fri

  • JAX–ONT, 10/10/2026: From $301
    10

    Sat

  • JAX–ONT, 10/11/2026: From $381
    11

    Sun

  • JAX–ONT, 10/12/2026: From $381
    12

    Mon

  • JAX–ONT, 10/13/2026: From $301
    13

    Tue

  • JAX–ONT, 10/14/2026: From $301
    14

    Wed

  • JAX–ONT, 10/15/2026: From $381
    15

    Thu

  • JAX–ONT, 10/16/2026: From $381
    16

    Fri

  • JAX–ONT: cmp-view-offers-disclaimer. Find Offers
    17

    Sat

  • JAX–ONT, 10/18/2026: From $334
    18

    Sun

  • JAX–ONT, 10/19/2026: From $314
    19

    Mon

  • JAX–ONT, 10/20/2026: From $301
    20

    Tue

  • JAX–ONT, 10/21/2026: From $301
    21

    Wed

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

    Thu

  • JAX–ONT, 10/23/2026: From $314
    23

    Fri

  • JAX–ONT, 10/24/2026: From $274
    24

    Sat

  • JAX–ONT, 10/25/2026: From $290
    25

    Sun

  • JAX–ONT, 10/26/2026: From $274
    26

    Mon

  • JAX–ONT, 10/27/2026: From $274
    27

    Tue

  • JAX–ONT, 10/28/2026: From $274
    28

    Wed

  • JAX–ONT, 10/29/2026: From $225
    29

    Thu

  • JAX–ONT, 10/30/2026: From $274
    30

    Fri

  • JAX–ONT, 10/31/2026: From $225
    31

    Sat

  • JAX–ONT, 11/01/2026: From $244
    01

    Sun

    NOV

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

    Mon

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

    Tue

    • Range$225-$381

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

    Route Information

    71† 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 71 weekly flights from Jacksonville to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Jacksonville 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 Jacksonville 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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