Southwest® flights from Ontario/LA to Las Vegas from $82

Promo Code

Low fares from Ontario/LA to Las Vegas

$

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/20/2026

One-way

Basic

From
$82
Seen: 10 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/12/2026

One-way

Basic

From
$99
Seen: 10 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 11/14/2026

One-way

Basic

From
$99
Seen: 22 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/26/2026

One-way

Basic

From
$99
Seen: 23 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/29/2026

One-way

Basic

From
$99
Seen: 23 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 11/16/2026

One-way

Basic

From
$99
Seen: 21 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Ontario/LA to Las Vegas

Aug 2026
From$277*
Seen: 30 minutes ago
One Way/Basic
Sep 2026
From$99*
Seen: 21 hrs ago
One Way/Basic
Oct 2026
From$82*
Seen: 10 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $99
cmp-daily-histogram-bars-legend-max-price-aria-label $326
Displaying fares for August-2026
  • ONT–LAS, 08/22/2026: From $326
    22

    Sat

    AUG

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

    Sun

  • ONT–LAS, 08/24/2026: From $326
    24

    Mon

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

    Tue

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

    Wed

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

    Thu

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

    Fri

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

    Sat

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

    Sun

  • ONT–LAS, 08/31/2026: From $277
    31

    Mon

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

    Tue

    SEP

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

    Wed

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

    Thu

  • ONT–LAS, 09/04/2026: From $222
    04

    Fri

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

    Sat

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

    Sun

  • ONT–LAS, 09/07/2026: From $195
    07

    Mon

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

    Tue

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

    Wed

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

    Thu

  • ONT–LAS, 09/11/2026: From $141
    11

    Fri

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

    Sat

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

    Sun

  • ONT–LAS, 09/14/2026: From $99
    14

    Mon

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

    Tue

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

    Wed

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

    Thu

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

    Fri

  • ONT–LAS, 09/19/2026: From $99
    19

    Sat

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

    Sun

  • ONT–LAS, 09/21/2026: From $99
    21

    Mon

    • Range$99-$326

    *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/Ontario International Airport
    Arriving at:
    McCarran International Airport
    Average flight time:
    1 hour 5 minutes
    Distance:
    197 miles

    Route Information

    156† 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 Ontario/LA to Las Vegas is 1 hour 5 minutes.
    There are 156 weekly flights from Ontario/LA to Las Vegas on Southwest Airlines.
    Yes, Southwest flies nonstop from Ontario/LA to Las Vegas 5 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Ontario/LA to Las Vegas 4 times per day on Saturdays and 5 times per day on Sundays.
    To find the lowest fares by day and time to fly Ontario/LA to Las Vegas with Southwest, check out our Low Fare Calendar.
    You can rent a car at McCarran International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Las Vegas—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.

    Explore Flights from Other Popular Origins

    Popular Flights from Ontario/LA