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

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Low fares from Ontario/LA to Louisville

$

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 10/20/2026

One-way

Basic

From
$171
Seen: 14 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 10/29/2026

One-way

Basic

From
$171
Seen: 3 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 09/22/2026

One-way

Basic

From
$171
Seen: 16 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 09/28/2026

One-way

Basic

From
$171
Seen: 8 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 09/30/2026

One-way

Basic

From
$171
Seen: 19 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 10/19/2026

One-way

Basic

From
$171
Seen: 17 hrs ago

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Explore flights from Ontario/LA to Louisville

Aug 2026
From$291*
Seen: 17 hrs ago
One Way/Basic
Sep 2026
From$171*
Seen: 16 hrs ago
One Way/Basic
Oct 2026
From$171*
Seen: 17 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $185
cmp-daily-histogram-bars-legend-max-price-aria-label $400
Displaying fares for August-2026
  • ONT–SDF: cmp-view-offers-disclaimer. Find Offers
    21

    Fri

    AUG

  • ONT–SDF, 08/22/2026: From $291
    22

    Sat

  • ONT–SDF, 08/23/2026: From $400
    23

    Sun

  • ONT–SDF, 08/24/2026: From $371
    24

    Mon

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

    Tue

  • ONT–SDF: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

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

    Thu

  • ONT–SDF, 08/28/2026: From $371
    28

    Fri

  • ONT–SDF: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

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

    Sun

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

    Mon

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

    Tue

    SEP

  • ONT–SDF, 09/02/2026: From $291
    02

    Wed

  • ONT–SDF, 09/03/2026: From $294
    03

    Thu

  • ONT–SDF, 09/04/2026: From $294
    04

    Fri

  • ONT–SDF, 09/05/2026: From $206
    05

    Sat

  • ONT–SDF, 09/06/2026: From $294
    06

    Sun

  • ONT–SDF, 09/07/2026: From $299
    07

    Mon

  • ONT–SDF, 09/08/2026: From $291
    08

    Tue

  • ONT–SDF, 09/09/2026: From $206
    09

    Wed

  • ONT–SDF: cmp-view-offers-disclaimer. Find Offers
    10

    Thu

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

    Fri

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

    Sat

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

    Sun

  • ONT–SDF, 09/14/2026: From $210
    14

    Mon

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

    Tue

  • ONT–SDF: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

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

    Thu

  • ONT–SDF, 09/18/2026: From $185
    18

    Fri

  • ONT–SDF, 09/19/2026: From $185
    19

    Sat

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

    Sun

    • Range$185-$400

    *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:
    Louisville International Airport
    Distance:
    1796 miles

    Route Information

    84† 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 84 weekly flights from Ontario/LA to Louisville on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Louisville with Southwest, check out our Low Fare Calendar.
    You can rent a car at Louisville International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Louisville—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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