Southwest® flights from New York (LaGuardia) to Ontario/LA from $154

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

$

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 10/07/2026

One-way

Basic

From
$154
Seen: 20 hrs ago

New York (LaGuardia) (LGA)to

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

One-way

Basic

From
$154
Seen: 16 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 10/20/2026

One-way

Basic

From
$154
Seen: 9 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 10/21/2026

One-way

Basic

From
$154
Seen: 6 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 11/17/2026

One-way

Basic

From
$154
Seen: 22 hrs ago

New York (LaGuardia) (LGA)to

Ontario/LA (ONT)
Depart: 09/23/2026

One-way

Basic

From
$154
Seen: 19 hrs ago

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

Aug 2026
From$209*
Seen: 12 hrs ago
One Way/Basic
Sep 2026
From$154*
Seen: 19 hrs ago
One Way/Basic
Oct 2026
From$154*
Seen: 4 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $159
cmp-daily-histogram-bars-legend-max-price-aria-label $357
Displaying fares for August-2026
  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    22

    Sat

    AUG

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

    Sun

  • LGA–ONT, 08/24/2026: From $357
    24

    Mon

  • LGA–ONT, 08/25/2026: From $338
    25

    Tue

  • LGA–ONT, 08/26/2026: From $338
    26

    Wed

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

    Thu

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

    Fri

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

    Sat

  • LGA–ONT, 08/30/2026: From $209
    30

    Sun

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    31

    Mon

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

    Tue

    SEP

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

    Wed

  • LGA–ONT, 09/03/2026: From $279
    03

    Thu

  • LGA–ONT, 09/04/2026: From $259
    04

    Fri

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    05

    Sat

  • LGA–ONT, 09/06/2026: From $235
    06

    Sun

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

    Mon

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    08

    Tue

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    09

    Wed

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    10

    Thu

  • LGA–ONT, 09/11/2026: From $159
    11

    Fri

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

    Sat

  • LGA–ONT, 09/13/2026: From $284
    13

    Sun

  • LGA–ONT, 09/14/2026: From $295
    14

    Mon

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

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

    Wed

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

    Thu

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

    Fri

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

    Sat

  • LGA–ONT: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

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

    Mon

    • Range$159-$357

    *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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