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: 10/27/2026

One-way

Basic

From
$171
Seen: 3 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 11/09/2026

One-way

Basic

From
$171
Seen: 25 minutes ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 11/21/2026

One-way

Basic

From
$209
Seen: 10 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 11/23/2026

One-way

Basic

From
$209
Seen: 20 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 11/26/2026

One-way

Basic

From
$209
Seen: 12 hrs ago

Ontario/LA (ONT)to

Louisville (SDF)
Depart: 11/19/2026

One-way

Basic

From
$209
Seen: 10 hrs ago

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Explore flights from Ontario/LA to Louisville

Oct 2026
From$171*
Seen: 3 hrs ago
One Way/Basic
Nov 2026
From$171*
Seen: 25 minutes ago
One Way/Basic
Dec 2026
From$293*
Seen: 10 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $171
cmp-daily-histogram-bars-legend-max-price-aria-label $381
Displaying fares for October-2026
  • ONT–SDF: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

  • ONT–SDF, 10/02/2026: From $381
    02

    Fri

  • ONT–SDF, 10/03/2026: From $301
    03

    Sat

  • ONT–SDF, 10/04/2026: From $381
    04

    Sun

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

    Mon

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

    Tue

  • ONT–SDF, 10/07/2026: From $306
    07

    Wed

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    08

    Thu

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    09

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

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

    Wed

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

    Thu

  • ONT–SDF, 10/16/2026: From $304
    16

    Fri

  • ONT–SDF, 10/17/2026: From $301
    17

    Sat

  • ONT–SDF, 10/18/2026: From $304
    18

    Sun

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

    Mon

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

    Tue

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

    Wed

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

    Thu

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    23

    Fri

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    24

    Sat

  • ONT–SDF, 10/25/2026: From $264
    25

    Sun

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

    Mon

  • ONT–SDF, 10/27/2026: From $171
    27

    Tue

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

    Wed

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

    Thu

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    30

    Fri

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

    Sat

    • Range$171-$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:
    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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