Southwest® flights from Atlanta to Ontario/LA from $197

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Low fares from Atlanta to Ontario/LA

$

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/03/2026

One-way

Basic

From
$197
Seen: 18 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 10/13/2026

One-way

Basic

From
$197
Seen: 20 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 10/14/2026

One-way

Basic

From
$230
Seen: 9 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/14/2026

One-way

Basic

From
$230
Seen: 13 hrs ago

Atlanta (ATL)to

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

One-way

Basic

From
$230
Seen: 9 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/17/2026

One-way

Basic

From
$230
Seen: 9 hrs ago

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Explore flights from Atlanta to Ontario/LA

Sep 2026
From$324*
Seen: 1 hour ago
One Way/Basic
Oct 2026
From$197*
Seen: 20 hrs ago
One Way/Basic
Nov 2026
From$230*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $230
cmp-daily-histogram-bars-legend-max-price-aria-label $550
Displaying fares for September-2026
  • ATL–ONT, 09/12/2026: From $475
    12

    Sat

    SEP

  • ATL–ONT, 09/13/2026: From $550
    13

    Sun

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

    Mon

  • ATL–ONT, 09/15/2026: From $475
    15

    Tue

  • ATL–ONT, 09/16/2026: From $465
    16

    Wed

  • ATL–ONT, 09/17/2026: From $475
    17

    Thu

  • ATL–ONT, 09/18/2026: From $450
    18

    Fri

  • ATL–ONT, 09/19/2026: From $415
    19

    Sat

  • ATL–ONT, 09/20/2026: From $415
    20

    Sun

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

    Mon

  • ATL–ONT, 09/22/2026: From $405
    22

    Tue

  • ATL–ONT: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

  • ATL–ONT: cmp-view-offers-disclaimer. Find Offers
    24

    Thu

  • ATL–ONT, 09/25/2026: From $324
    25

    Fri

  • ATL–ONT, 09/26/2026: From $324
    26

    Sat

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

    Sun

  • ATL–ONT, 09/28/2026: From $324
    28

    Mon

  • ATL–ONT, 09/29/2026: From $324
    29

    Tue

  • ATL–ONT, 09/30/2026: From $324
    30

    Wed

  • ATL–ONT, 10/01/2026: From $324
    01

    Thu

    OCT

  • ATL–ONT, 10/02/2026: From $230
    02

    Fri

  • ATL–ONT, 10/03/2026: From $230
    03

    Sat

  • ATL–ONT: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • ATL–ONT, 10/05/2026: From $230
    05

    Mon

  • ATL–ONT: cmp-view-offers-disclaimer. Find Offers
    06

    Tue

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

    Wed

  • ATL–ONT, 10/08/2026: From $230
    08

    Thu

  • ATL–ONT, 10/09/2026: From $294
    09

    Fri

  • ATL–ONT, 10/10/2026: From $235
    10

    Sat

  • ATL–ONT, 10/11/2026: From $255
    11

    Sun

    • Range$230-$550

    *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:
    Hartsfield-Jackson Atlanta International Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    1900 miles

    Route Information

    145† 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 145 weekly flights from Atlanta to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Atlanta 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 Atlanta 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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