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: 11/11/2026

One-way

Basic

From
$189
Seen: 12 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 12/17/2026

One-way

Basic

From
$189
Seen: 15 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 12/03/2026

One-way

Basic

From
$189
Seen: 3 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 11/07/2026

One-way

Basic

From
$189
Seen: 36 minutes ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 12/10/2026

One-way

Basic

From
$189
Seen: 7 hrs ago

Ontario/LA (ONT)to

Atlanta (ATL)
Depart: 10/28/2026

One-way

Basic

From
$189
Seen: 5 hrs ago

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Explore flights from Ontario/LA to Atlanta

Sep 2026
From$475*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 5 hrs ago
One Way/Basic
Nov 2026
From$189*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $475
Displaying fares for September-2026
  • ONT–ATL, 09/30/2026: From $475
    30

    Wed

    SEP

  • ONT–ATL, 10/01/2026: From $475
    01

    Thu

  • ONT–ATL, 10/02/2026: From $475
    02

    Fri

  • ONT–ATL, 10/03/2026: From $475
    03

    Sat

  • ONT–ATL, 10/04/2026: From $475
    04

    Sun

  • ONT–ATL, 10/05/2026: From $475
    05

    Mon

  • ONT–ATL, 10/06/2026: From $415
    06

    Tue

  • ONT–ATL, 10/07/2026: From $415
    07

    Wed

  • ONT–ATL, 10/08/2026: From $475
    08

    Thu

  • ONT–ATL, 10/09/2026: From $415
    09

    Fri

  • ONT–ATL, 10/10/2026: From $415
    10

    Sat

  • ONT–ATL, 10/11/2026: From $415
    11

    Sun

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

    Mon

  • ONT–ATL, 10/13/2026: From $324
    13

    Tue

  • ONT–ATL, 10/14/2026: From $324
    14

    Wed

  • ONT–ATL, 10/15/2026: From $324
    15

    Thu

  • ONT–ATL, 10/16/2026: From $324
    16

    Fri

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

    Sat

  • ONT–ATL, 10/18/2026: From $324
    18

    Sun

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

    Mon

  • ONT–ATL, 10/20/2026: From $189
    20

    Tue

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

    Wed

  • ONT–ATL, 10/22/2026: From $294
    22

    Thu

  • ONT–ATL, 10/23/2026: From $205
    23

    Fri

  • ONT–ATL, 10/24/2026: From $194
    24

    Sat

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

    Sun

  • ONT–ATL, 10/26/2026: From $189
    26

    Mon

  • ONT–ATL, 10/27/2026: From $189
    27

    Tue

  • ONT–ATL, 10/28/2026: From $189
    28

    Wed

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

    Thu

    • Range$189-$475

    *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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