Southwest® flights from Louisville to Ontario/LA from $171

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Low fares from Louisville to Ontario/LA

$

Louisville (SDF)to

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

One-way

Basic

From
$171
Seen: 2 hrs ago

Louisville (SDF)to

Ontario/LA (ONT)
Depart: 10/27/2026

One-way

Basic

From
$171
Seen: 2 hrs ago

Louisville (SDF)to

Ontario/LA (ONT)
Depart: 11/23/2026

One-way

Basic

From
$171
Seen: 2 hrs ago

Louisville (SDF)to

Ontario/LA (ONT)
Depart: 10/21/2026

One-way

Basic

From
$171
Seen: 7 hrs ago

Louisville (SDF)to

Ontario/LA (ONT)
Depart: 10/22/2026

One-way

Basic

From
$171
Seen: 12 hrs ago

Louisville (SDF)to

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

One-way

Basic

From
$171
Seen: 4 hrs ago

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Explore flights from Louisville to Ontario/LA

Sep 2026
From$291*
Seen: 20 hrs ago
One Way/Basic
Oct 2026
From$171*
Seen: 12 hrs ago
One Way/Basic
Nov 2026
From$171*
Seen: 2 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $184
cmp-daily-histogram-bars-legend-max-price-aria-label $808
Displaying fares for September-2026
  • SDF–ONT, 09/11/2026: From $371
    11

    Fri

    SEP

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    12

    Sat

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    13

    Sun

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    14

    Mon

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    15

    Tue

  • SDF–ONT, 09/16/2026: From $291
    16

    Wed

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    17

    Thu

  • SDF–ONT, 09/18/2026: From $371
    18

    Fri

  • SDF–ONT, 09/19/2026: From $291
    19

    Sat

  • SDF–ONT, 09/20/2026: From $371
    20

    Sun

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    21

    Mon

  • SDF–ONT, 09/22/2026: From $291
    22

    Tue

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    23

    Wed

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    24

    Thu

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    25

    Fri

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    26

    Sat

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    27

    Sun

  • SDF–ONT, 09/28/2026: From $808
    28

    Mon

  • SDF–ONT, 09/29/2026: From $291
    29

    Tue

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    30

    Wed

  • SDF–ONT, 10/01/2026: From $269
    01

    Thu

    OCT

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    02

    Fri

  • SDF–ONT, 10/03/2026: From $184
    03

    Sat

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    04

    Sun

  • SDF–ONT, 10/05/2026: From $224
    05

    Mon

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    06

    Tue

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    07

    Wed

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    08

    Thu

  • SDF–ONT, 10/09/2026: From $269
    09

    Fri

  • SDF–ONT, 10/10/2026: From $184
    10

    Sat

    • Range$184-$808

    *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:
    Louisville International Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    1796 miles

    Route Information

    85† 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 85 weekly flights from Louisville to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Louisville 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 Louisville 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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