Southwest® flights from Las Vegas to Ontario/LA from $99

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Low fares from Las Vegas to Ontario/LA

$

Las Vegas (LAS)to

Ontario/LA (ONT)
Depart: 10/31/2026

One-way

Basic

From
$99
Seen: 16 hrs ago

Las Vegas (LAS)to

Ontario/LA (ONT)
Depart: 09/15/2026

One-way

Basic

From
$99
Seen: 23 hrs ago

Las Vegas (LAS)to

Ontario/LA (ONT)
Depart: 10/01/2026

One-way

Basic

From
$99
Seen: 10 hrs ago

Las Vegas (LAS)to

Ontario/LA (ONT)
Depart: 10/12/2026

One-way

Basic

From
$99
Seen: 9 hrs ago

Las Vegas (LAS)to

Ontario/LA (ONT)
Depart: 10/28/2026

One-way

Basic

From
$99
Seen: 4 hrs ago

Las Vegas (LAS)to

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

One-way

Basic

From
$99
Seen: 6 hrs ago

Looking for more low-fare flights?

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Explore flights from Las Vegas to Ontario/LA

Aug 2026
From$306*
Seen: 7 hrs ago
One Way/Basic
Sep 2026
From$99*
Seen: 15 hrs ago
One Way/Basic
Oct 2026
From$99*
Seen: 7 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $99
cmp-daily-histogram-bars-legend-max-price-aria-label $394
Displaying fares for August-2026
  • LAS–ONT, 08/21/2026: From $326
    21

    Fri

    AUG

  • LAS–ONT, 08/22/2026: From $326
    22

    Sat

  • LAS–ONT, 08/23/2026: From $326
    23

    Sun

  • LAS–ONT, 08/24/2026: From $394
    24

    Mon

  • LAS–ONT, 08/25/2026: From $326
    25

    Tue

  • LAS–ONT, 08/26/2026: From $326
    26

    Wed

  • LAS–ONT, 08/27/2026: From $306
    27

    Thu

  • LAS–ONT, 08/28/2026: From $306
    28

    Fri

  • LAS–ONT, 08/29/2026: From $306
    29

    Sat

  • LAS–ONT, 08/30/2026: From $306
    30

    Sun

  • LAS–ONT, 08/31/2026: From $306
    31

    Mon

  • LAS–ONT, 09/01/2026: From $306
    01

    Tue

    SEP

  • LAS–ONT, 09/02/2026: From $306
    02

    Wed

  • LAS–ONT, 09/03/2026: From $195
    03

    Thu

  • LAS–ONT, 09/04/2026: From $195
    04

    Fri

  • LAS–ONT, 09/05/2026: From $195
    05

    Sat

  • LAS–ONT, 09/06/2026: From $195
    06

    Sun

  • LAS–ONT, 09/07/2026: From $240
    07

    Mon

  • LAS–ONT, 09/08/2026: From $195
    08

    Tue

  • LAS–ONT, 09/09/2026: From $195
    09

    Wed

  • LAS–ONT, 09/10/2026: From $99
    10

    Thu

  • LAS–ONT, 09/11/2026: From $107
    11

    Fri

  • LAS–ONT, 09/12/2026: From $99
    12

    Sat

  • LAS–ONT, 09/13/2026: From $135
    13

    Sun

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

    Mon

  • LAS–ONT, 09/15/2026: From $99
    15

    Tue

  • LAS–ONT, 09/16/2026: From $99
    16

    Wed

  • LAS–ONT, 09/17/2026: From $99
    17

    Thu

  • LAS–ONT, 09/18/2026: From $107
    18

    Fri

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

    Sat

  • LAS–ONT, 09/20/2026: From $135
    20

    Sun

    • Range$99-$394

    *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:
    McCarran International Airport
    Arriving at:
    LA/Ontario International Airport
    Average flight time:
    1 hour 4 minutes
    Distance:
    197 miles

    Route Information

    153† Weekly flights
    • 5‡ Nonstop flights per day Monday through Friday
    • 4‡ Nonstop flights on Saturday
    • 5‡ Nonstop flights on Sunday

    † 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

    The average flight time from Las Vegas to Ontario/LA is 1 hour 4 minutes.
    There are 153 weekly flights from Las Vegas to Ontario/LA on Southwest Airlines.
    Yes, Southwest flies nonstop from Las Vegas to Ontario/LA 5 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Las Vegas to Ontario/LA 4 times per day on Saturdays and 5 times per day on Sundays.
    To find the lowest fares by day and time to fly Las Vegas 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 Las Vegas 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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