Southwest® flights from Boise to Ontario/LA from $99

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Low fares from Boise to Ontario/LA

$

Boise (BOI)to

Ontario/LA (ONT)
Depart: 10/27/2026

One-way

Basic

From
$99
Seen: 14 hrs ago

Boise (BOI)to

Ontario/LA (ONT)
Depart: 10/07/2026

One-way

Basic

From
$99
Seen: 17 hrs ago

Boise (BOI)to

Ontario/LA (ONT)
Depart: 09/03/2026

One-way

Basic

From
$104
Seen: 9 hrs ago

Boise (BOI)to

Ontario/LA (ONT)
Depart: 10/22/2026

One-way

Basic

From
$109
Seen: 6 hrs ago

Boise (BOI)to

Ontario/LA (ONT)
Depart: 09/04/2026

One-way

Basic

From
$109
Seen: 6 hrs ago

Boise (BOI)to

Ontario/LA (ONT)
Depart: 10/02/2026

One-way

Basic

From
$109
Seen: 13 hrs ago

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Explore flights from Boise to Ontario/LA

Aug 2026
From$109*
Seen: 1 hour ago
One Way/Basic
Sep 2026
From$104*
Seen: 9 hrs ago
One Way/Basic
Oct 2026
From$99*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $109
cmp-daily-histogram-bars-legend-max-price-aria-label $312
Displaying fares for August-2026
  • BOI–ONT, 08/02/2026: From $312
    02

    Sun

    AUG

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    03

    Mon

  • BOI–ONT, 08/04/2026: From $312
    04

    Tue

  • BOI–ONT, 08/05/2026: From $312
    05

    Wed

  • BOI–ONT, 08/06/2026: From $307
    06

    Thu

  • BOI–ONT, 08/07/2026: From $307
    07

    Fri

  • BOI–ONT, 08/08/2026: From $284
    08

    Sat

  • BOI–ONT, 08/09/2026: From $284
    09

    Sun

  • BOI–ONT, 08/10/2026: From $284
    10

    Mon

  • BOI–ONT, 08/11/2026: From $284
    11

    Tue

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    12

    Wed

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    13

    Thu

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    14

    Fri

  • BOI–ONT, 08/15/2026: From $224
    15

    Sat

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    16

    Sun

  • BOI–ONT, 08/17/2026: From $219
    17

    Mon

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    18

    Tue

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    19

    Wed

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    20

    Thu

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    21

    Fri

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    22

    Sat

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    23

    Sun

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    24

    Mon

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    25

    Tue

  • BOI–ONT, 08/26/2026: From $168
    26

    Wed

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    27

    Thu

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    28

    Fri

  • BOI–ONT, 08/29/2026: From $168
    29

    Sat

  • BOI–ONT, 08/30/2026: From $144
    30

    Sun

  • BOI–ONT, 08/31/2026: From $109
    31

    Mon

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    01

    Tue

    SEP

    • Range$109-$312

    *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:
    Boise Airport
    Arriving at:
    LA/Ontario International Airport
    Distance:
    660 miles

    Route Information

    147† 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 147 weekly flights from Boise to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Boise 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 Boise 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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