Southwest® flights from New York (LaGuardia) to Ontario/LA from $144

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Low fares from New York (LaGuardia) to Ontario/LA

$

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 09/12/2026

One-way

Basic

From
$144
Seen: 22 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 10/15/2026

One-way

Basic

From
$149
Seen: 20 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 08/25/2026

One-way

Basic

From
$149
Seen: 22 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 08/29/2026

One-way

Basic

From
$149
Seen: 21 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 09/30/2026

One-way

Basic

From
$149
Seen: 1 hour ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 08/21/2026

One-way

Basic

From
$154
Seen: 3 hrs ago

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Explore flights from New York (LaGuardia) to Ontario/LA

Aug 2026
From$149*
Seen: 22 hrs ago
One Way/Basic
Sep 2026
From$144*
Seen: 22 hrs ago
One Way/Basic
Oct 2026
From$149*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $149
cmp-daily-histogram-bars-legend-max-price-aria-label $425
Displaying fares for August-2026
  • LGA–ONT, 08/03/2026: From $342
    03

    Mon

    AUG

  • LGA–ONT, 08/04/2026: From $323
    04

    Tue

  • LGA–ONT, 08/05/2026: From $342
    05

    Wed

  • LGA–ONT, 08/06/2026: From $342
    06

    Thu

  • LGA–ONT, 08/07/2026: From $347
    07

    Fri

  • LGA–ONT, 08/08/2026: From $425
    08

    Sat

  • LGA–ONT, 08/09/2026: From $364
    09

    Sun

  • LGA–ONT, 08/10/2026: From $315
    10

    Mon

  • LGA–ONT, 08/11/2026: From $310
    11

    Tue

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

    Wed

  • LGA–ONT, 08/13/2026: From $194
    13

    Thu

  • LGA–ONT, 08/14/2026: From $315
    14

    Fri

  • LGA–ONT, 08/15/2026: From $315
    15

    Sat

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

    Sun

  • LGA–ONT, 08/17/2026: From $160
    17

    Mon

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    18

    Tue

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

    Wed

  • LGA–ONT, 08/20/2026: From $154
    20

    Thu

  • LGA–ONT, 08/21/2026: From $154
    21

    Fri

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

    Sat

  • LGA–ONT, 08/23/2026: From $280
    23

    Sun

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

    Mon

  • LGA–ONT, 08/25/2026: From $149
    25

    Tue

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

    Wed

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

    Thu

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

    Fri

  • LGA–ONT, 08/29/2026: From $149
    29

    Sat

  • LGA–ONT, 08/30/2026: From $199
    30

    Sun

  • LGA–ONT, 08/31/2026: From $189
    31

    Mon

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

    Tue

    SEP

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

    Wed

    • Range$149-$425

    *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 Guardia Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    2424 miles

    Route Information

    105† 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 105 weekly flights from New York (LaGuardia) to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly New York (LaGuardia) 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 New York (LaGuardia) 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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