Southwest® flights from Atlanta to Ontario/LA from $177

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Low fares from Atlanta to Ontario/LA

$

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 01/20/2027

One-way

Basic

From
$177
Seen: 7 hrs ago

Atlanta (ATL)to

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

One-way

Basic

From
$215
Seen: 23 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/05/2026

One-way

Basic

From
$215
Seen: 14 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/08/2026

One-way

Basic

From
$215
Seen: 18 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 02/09/2027

One-way

Basic

From
$215
Seen: 9 hrs ago

Atlanta (ATL)to

Ontario/LA (ONT)
Depart: 12/22/2026

One-way

Basic

From
$215
Seen: 9 hrs ago

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Explore flights from Atlanta to Ontario/LA

Nov 2026
From$339*
Seen: 4 hrs ago
One Way/Basic
Dec 2026
From$215*
Seen: 9 hrs ago
One Way/Basic
Jan 2027
From$177*
Seen: 7 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $215
cmp-daily-histogram-bars-legend-max-price-aria-label $490
Displaying fares for November-2026
  • ATL–ONT, 11/11/2026: From $490
    11

    Wed

    NOV

  • ATL–ONT, 11/12/2026: From $490
    12

    Thu

  • ATL–ONT, 11/13/2026: From $490
    13

    Fri

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

    Sat

  • ATL–ONT, 11/15/2026: From $490
    15

    Sun

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

    Mon

  • ATL–ONT, 11/17/2026: From $430
    17

    Tue

  • ATL–ONT, 11/18/2026: From $430
    18

    Wed

  • ATL–ONT, 11/19/2026: From $430
    19

    Thu

  • ATL–ONT, 11/20/2026: From $430
    20

    Fri

  • ATL–ONT, 11/21/2026: From $430
    21

    Sat

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

    Sun

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

    Mon

  • ATL–ONT, 11/24/2026: From $339
    24

    Tue

  • ATL–ONT, 11/25/2026: From $339
    25

    Wed

  • ATL–ONT, 11/26/2026: From $339
    26

    Thu

  • ATL–ONT, 11/27/2026: From $339
    27

    Fri

  • ATL–ONT, 11/28/2026: From $450
    28

    Sat

  • ATL–ONT, 11/29/2026: From $455
    29

    Sun

  • ATL–ONT, 11/30/2026: From $339
    30

    Mon

  • ATL–ONT, 12/01/2026: From $220
    01

    Tue

    DEC

  • ATL–ONT, 12/02/2026: From $215
    02

    Wed

  • ATL–ONT, 12/03/2026: From $240
    03

    Thu

  • ATL–ONT, 12/04/2026: From $255
    04

    Fri

  • ATL–ONT, 12/05/2026: From $215
    05

    Sat

  • ATL–ONT, 12/06/2026: From $309
    06

    Sun

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

    Mon

  • ATL–ONT, 12/08/2026: From $215
    08

    Tue

  • ATL–ONT, 12/09/2026: From $220
    09

    Wed

  • ATL–ONT, 12/10/2026: From $230
    10

    Thu

    • Range$215-$490

    *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

    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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