Southwest® flights from Montrose, CO to Ontario/LA from $184

Promo Code

Low fares from Montrose, CO to Ontario/LA

$

Montrose, CO (MTJ)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Basic

From
$184
Seen: 3 hrs ago

Montrose, CO (MTJ)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Choice

From
$224
Seen: 3 hrs ago

Montrose, CO (MTJ)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Choice Preferred

From
$294
Seen: 3 hrs ago

Montrose, CO (MTJ)to

Ontario/LA (ONT)
Depart: 10/29/2026

One-way

Choice Extra

From
$339
Seen: 3 hrs ago

Montrose, CO (MTJ)to

Ontario/LA (ONT)
Depart: 09/17/2026

One-way

Choice

From
$467
Seen: 11 hrs ago

Montrose, CO (MTJ)to

Ontario/LA (ONT)
Depart: 09/29/2026

One-way

Choice

From
$519
Seen: 9 hrs ago

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Explore flights from Montrose, CO to Ontario/LA

Sep 2026
From$467*
Seen: 11 hrs ago
One Way/Basic
Oct 2026
From$184*
Seen: 3 hrs ago
One Way/Basic
Nov 2026
No result for this month.
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Displaying fares for September-2026
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    • Range$467-$519

    *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:
    Montrose Regional Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    622 miles

    Route Information

    34† 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 34 weekly flights from Montrose, CO to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Montrose, CO 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 Montrose, CO 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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