Southwest® flights from Ontario/LA to Salt Lake City from $129

Promo Code

Low fares from Ontario/LA to Salt Lake City

$

Ontario/LA (ONT)to

Salt Lake City (SLC)
Depart: 11/07/2026

One-way

Basic

From
$129
Seen: 12 hrs ago

Ontario/LA (ONT)to

Salt Lake City (SLC)
Depart: 11/14/2026

One-way

Basic

From
$129
Seen: 3 hrs ago

Ontario/LA (ONT)to

Salt Lake City (SLC)
Depart: 10/17/2026

One-way

Basic

From
$134
Seen: 12 hrs ago

Ontario/LA (ONT)to

Salt Lake City (SLC)
Depart: 09/12/2026

One-way

Basic

From
$134
Seen: 10 hrs ago

Ontario/LA (ONT)to

Salt Lake City (SLC)
Depart: 09/16/2026

One-way

Basic

From
$134
Seen: 10 hrs ago

Ontario/LA (ONT)to

Salt Lake City (SLC)
Depart: 10/05/2026

One-way

Basic

From
$134
Seen: 11 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 Salt Lake City

Aug 2026
From$310*
Seen: 8 hrs ago
One Way/Basic
Sep 2026
From$134*
Seen: 23 hrs ago
One Way/Basic
Oct 2026
From$134*
Seen: 10 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $134
cmp-daily-histogram-bars-legend-max-price-aria-label $360
Displaying fares for August-2026
  • ONT–SLC: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

    AUG

  • ONT–SLC, 08/24/2026: From $360
    24

    Mon

  • ONT–SLC, 08/25/2026: From $360
    25

    Tue

  • ONT–SLC: cmp-view-offers-disclaimer. Find Offers
    26

    Wed

  • ONT–SLC, 08/27/2026: From $360
    27

    Thu

  • ONT–SLC, 08/28/2026: From $360
    28

    Fri

  • ONT–SLC, 08/29/2026: From $310
    29

    Sat

  • ONT–SLC, 08/30/2026: From $310
    30

    Sun

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

    Mon

  • ONT–SLC, 09/01/2026: From $310
    01

    Tue

    SEP

  • ONT–SLC, 09/02/2026: From $310
    02

    Wed

  • ONT–SLC, 09/03/2026: From $310
    03

    Thu

  • ONT–SLC, 09/04/2026: From $310
    04

    Fri

  • ONT–SLC, 09/05/2026: From $199
    05

    Sat

  • ONT–SLC, 09/06/2026: From $199
    06

    Sun

  • ONT–SLC, 09/07/2026: From $199
    07

    Mon

  • ONT–SLC, 09/08/2026: From $199
    08

    Tue

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

    Wed

  • ONT–SLC, 09/10/2026: From $199
    10

    Thu

  • ONT–SLC, 09/11/2026: From $199
    11

    Fri

  • ONT–SLC, 09/12/2026: From $134
    12

    Sat

  • ONT–SLC, 09/13/2026: From $179
    13

    Sun

  • ONT–SLC, 09/14/2026: From $134
    14

    Mon

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

    Tue

  • ONT–SLC, 09/16/2026: From $134
    16

    Wed

  • ONT–SLC, 09/17/2026: From $134
    17

    Thu

  • ONT–SLC, 09/18/2026: From $152
    18

    Fri

  • ONT–SLC, 09/19/2026: From $134
    19

    Sat

  • ONT–SLC, 09/20/2026: From $179
    20

    Sun

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

    Mon

  • ONT–SLC: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

    • Range$134-$360

    *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:
    Salt Lake City International Airport
    Distance:
    558 miles

    Route Information

    143† 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 143 weekly flights from Ontario/LA to Salt Lake City on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Salt Lake City with Southwest, check out our Low Fare Calendar.
    You can rent a car at Salt Lake City International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Salt Lake City—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