Southwest® flights from Atlanta to Ontario/LA from $156

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Low fares from Atlanta to Ontario/LA

$

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Basic

From
$156
Seen: 19 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/23/2026

One-way

Basic

From
$189
Seen: 16 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/02/2026

One-way

Basic

From
$189
Seen: 16 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/07/2026

One-way

Basic

From
$189
Seen: 11 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 10/27/2026

One-way

Basic

From
$189
Seen: 20 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 11/19/2026

One-way

Basic

From
$189
Seen: 9 hrs ago

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Explore flights from Atlanta to Ontario/LA

Oct 2026
From$156*
Seen: 19 hrs ago
One Way/Basic
Nov 2026
From$189*
Seen: 21 hrs ago
One Way/Basic
Dec 2026
From$189*
Seen: 3 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $156
cmp-daily-histogram-bars-legend-max-price-aria-label $540
Displaying fares for October-2026
  • ATL–ONT, 10/02/2026: From $475
    02

    Fri

    OCT

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

    Sat

  • ATL–ONT, 10/04/2026: From $540
    04

    Sun

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

    Mon

  • ATL–ONT, 10/06/2026: From $475
    06

    Tue

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

    Wed

  • ATL–ONT, 10/08/2026: From $440
    08

    Thu

  • ATL–ONT, 10/09/2026: From $475
    09

    Fri

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

    Sat

  • ATL–ONT, 10/11/2026: From $440
    11

    Sun

  • ATL–ONT, 10/12/2026: From $415
    12

    Mon

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

    Tue

  • ATL–ONT, 10/14/2026: From $415
    14

    Wed

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

    Thu

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

    Fri

  • ATL–ONT, 10/17/2026: From $324
    17

    Sat

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

    Sun

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

    Mon

  • ATL–ONT, 10/20/2026: From $324
    20

    Tue

  • ATL–ONT, 10/21/2026: From $324
    21

    Wed

  • ATL–ONT, 10/22/2026: From $235
    22

    Thu

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

    Fri

  • ATL–ONT, 10/24/2026: From $189
    24

    Sat

  • ATL–ONT, 10/25/2026: From $294
    25

    Sun

  • ATL–ONT, 10/26/2026: From $294
    26

    Mon

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

    Tue

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

    Wed

  • ATL–ONT, 10/29/2026: From $156
    29

    Thu

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

    Fri

  • ATL–ONT, 10/31/2026: From $189
    31

    Sat

  • ATL–ONT, 11/01/2026: From $255
    01

    Sun

    NOV

    • Range$156-$540

    *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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