Southwest® flights from Ontario/LA to Las Vegas from $90

Promo Code

Low fares from Ontario/LA to Las Vegas

$

Ontario/LA (ONT)to

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

One-way

Basic

From
$90
Seen: 7 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/27/2026

One-way

Basic

From
$90
Seen: 14 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/05/2026

One-way

Basic

From
$90
Seen: 20 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 11/09/2026

One-way

Basic

From
$90
Seen: 18 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 11/04/2026

One-way

Basic

From
$90
Seen: 17 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 10/07/2026

One-way

Basic

From
$90
Seen: 18 hrs ago

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Explore flights from Ontario/LA to Las Vegas

Sep 2026
From$90*
Seen: 7 hrs ago
One Way/Basic
Oct 2026
From$90*
Seen: 15 hrs ago
One Way/Basic
Nov 2026
From$90*
Seen: 23 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $90
cmp-daily-histogram-bars-legend-max-price-aria-label $336
Displaying fares for September-2026
  • ONT–LAS, 09/11/2026: From $336
    11

    Fri

    SEP

  • ONT–LAS, 09/12/2026: From $336
    12

    Sat

  • ONT–LAS, 09/13/2026: From $336
    13

    Sun

  • ONT–LAS, 09/14/2026: From $336
    14

    Mon

  • ONT–LAS, 09/15/2026: From $336
    15

    Tue

  • ONT–LAS, 09/16/2026: From $336
    16

    Wed

  • ONT–LAS, 09/17/2026: From $316
    17

    Thu

  • ONT–LAS, 09/18/2026: From $316
    18

    Fri

  • ONT–LAS, 09/19/2026: From $316
    19

    Sat

  • ONT–LAS, 09/20/2026: From $316
    20

    Sun

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

    Mon

  • ONT–LAS, 09/22/2026: From $316
    22

    Tue

  • ONT–LAS, 09/23/2026: From $159
    23

    Wed

  • ONT–LAS, 09/24/2026: From $159
    24

    Thu

  • ONT–LAS, 09/25/2026: From $205
    25

    Fri

  • ONT–LAS, 09/26/2026: From $159
    26

    Sat

  • ONT–LAS, 09/27/2026: From $159
    27

    Sun

  • ONT–LAS, 09/28/2026: From $159
    28

    Mon

  • ONT–LAS, 09/29/2026: From $159
    29

    Tue

  • ONT–LAS, 09/30/2026: From $90
    30

    Wed

  • ONT–LAS, 10/01/2026: From $90
    01

    Thu

    OCT

  • ONT–LAS, 10/02/2026: From $90
    02

    Fri

  • ONT–LAS, 10/03/2026: From $109
    03

    Sat

  • ONT–LAS, 10/04/2026: From $159
    04

    Sun

  • ONT–LAS, 10/05/2026: From $90
    05

    Mon

  • ONT–LAS, 10/06/2026: From $90
    06

    Tue

  • ONT–LAS, 10/07/2026: From $90
    07

    Wed

  • ONT–LAS, 10/08/2026: From $90
    08

    Thu

  • ONT–LAS, 10/09/2026: From $90
    09

    Fri

  • ONT–LAS, 10/10/2026: From $90
    10

    Sat

    • Range$90-$336

    *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.

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