Southwest® flights from Ontario/LA to Las Vegas from $79

Promo Code

Low fares from Ontario/LA to Las Vegas

$

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 04/29/2026

One-way

Basic

From
$79
Seen: 20 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 05/27/2026

One-way

Basic

From
$79
Seen: 16 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 04/09/2026

One-way

Basic

From
$89
Seen: 23 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 04/16/2026

One-way

Basic

From
$89
Seen: 23 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 04/20/2026

One-way

Basic

From
$89
Seen: 23 hrs ago

Ontario/LA (ONT)to

Las Vegas (LAS)
Depart: 04/25/2026

One-way

Basic

From
$89
Seen: 23 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

Mar 2026
From$185*
Seen: 12 hrs ago
One Way/Basic
Apr 2026
From$79*
Seen: 20 hrs ago
One Way/Basic
May 2026
From$79*
Seen: 16 hrs ago
One Way/Basic
$89
$344
Displaying fares for March-2026
  • 13

    Fri

    MAR

  • 14

    Sat

  • 15

    Sun

  • 16

    Mon

  • 17

    Tue

  • 18

    Wed

  • 19

    Thu

  • 20

    Fri

  • 21

    Sat

  • 22

    Sun

  • 23

    Mon

  • 24

    Tue

  • 25

    Wed

  • 26

    Thu

  • 27

    Fri

  • 28

    Sat

  • 29

    Sun

  • 30

    Mon

  • 31

    Tue

  • 01

    Wed

    APR

  • 02

    Thu

  • 03

    Fri

  • 04

    Sat

  • 05

    Sun

  • 06

    Mon

  • 07

    Tue

  • 08

    Wed

  • 09

    Thu

  • 10

    Fri

  • 11

    Sat

  • 12

    Sun

    • Range$89-$344

    *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