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

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Low fares from Ontario/LA to Atlanta

$

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 10/22/2026

One-way

Basic

From
$189
Seen: 17 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 09/10/2026

One-way

Basic

From
$189
Seen: 19 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 10/19/2026

One-way

Basic

From
$189
Seen: 14 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 10/07/2026

One-way

Basic

From
$189
Seen: 9 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 09/22/2026

One-way

Basic

From
$189
Seen: 3 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 09/29/2026

One-way

Basic

From
$189
Seen: 6 hrs ago

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Explore flights from Ontario/LA to Atlanta

Aug 2026
From$395*
Seen: 21 hrs ago
One Way/Basic
Sep 2026
From$189*
Seen: 22 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 6 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $455
Displaying fares for August-2026
  • ONT–ATL, 08/20/2026: From $455
    20

    Thu

    AUG

  • ONT–ATL, 08/21/2026: From $455
    21

    Fri

  • ONT–ATL, 08/22/2026: From $455
    22

    Sat

  • ONT–ATL, 08/23/2026: From $455
    23

    Sun

  • ONT–ATL, 08/24/2026: From $455
    24

    Mon

  • ONT–ATL, 08/25/2026: From $455
    25

    Tue

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

    Wed

  • ONT–ATL: cmp-view-offers-disclaimer. Find Offers
    27

    Thu

  • ONT–ATL, 08/28/2026: From $395
    28

    Fri

  • ONT–ATL, 08/29/2026: From $395
    29

    Sat

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

    Sun

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

    Mon

  • ONT–ATL: cmp-view-offers-disclaimer. Find Offers
    01

    Tue

    SEP

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

    Wed

  • ONT–ATL, 09/03/2026: From $304
    03

    Thu

  • ONT–ATL, 09/04/2026: From $304
    04

    Fri

  • ONT–ATL, 09/05/2026: From $304
    05

    Sat

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

    Sun

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

    Mon

  • ONT–ATL, 09/08/2026: From $304
    08

    Tue

  • ONT–ATL, 09/09/2026: From $304
    09

    Wed

  • ONT–ATL, 09/10/2026: From $189
    10

    Thu

  • ONT–ATL, 09/11/2026: From $207
    11

    Fri

  • ONT–ATL, 09/12/2026: From $189
    12

    Sat

  • ONT–ATL, 09/13/2026: From $274
    13

    Sun

  • ONT–ATL, 09/14/2026: From $212
    14

    Mon

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

    Tue

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

    Wed

  • ONT–ATL, 09/17/2026: From $274
    17

    Thu

  • ONT–ATL, 09/18/2026: From $207
    18

    Fri

  • ONT–ATL, 09/19/2026: From $189
    19

    Sat

    • Range$189-$455

    *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:
    Hartsfield-Jackson Atlanta International Airport
    Distance:
    1900 miles

    Route Information

    134† 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 134 weekly flights from Ontario/LA to Atlanta on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Atlanta with Southwest, check out our Low Fare Calendar.
    You can rent a car at Hartsfield-Jackson Atlanta International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Atlanta—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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