Southwest® flights from Ontario/LA to Boise from $94

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Low fares from Ontario/LA to Boise

$

Ontario/LA (ONT)to

Boise (BOI)
Depart: 08/29/2026

One-way

Basic

From
$94
Seen: 11 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 09/12/2026

One-way

Basic

From
$94
Seen: 7 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/07/2026

One-way

Basic

From
$94
Seen: 5 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 10/21/2026

One-way

Basic

From
$94
Seen: 22 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 09/01/2026

One-way

Basic

From
$94
Seen: 18 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 09/03/2026

One-way

Basic

From
$104
Seen: 22 hrs ago

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Explore flights from Ontario/LA to Boise

Jul 2026
From$312*
Seen: 7 hrs ago
One Way/Basic
Aug 2026
From$94*
Seen: 11 hrs ago
One Way/Basic
Sep 2026
From$94*
Seen: 18 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $94
cmp-daily-histogram-bars-legend-max-price-aria-label $312
Displaying fares for July-2026
  • ONT–BOI, 07/31/2026: From $312
    31

    Fri

    JUL

  • ONT–BOI, 08/01/2026: From $312
    01

    Sat

  • ONT–BOI, 08/02/2026: From $312
    02

    Sun

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    03

    Mon

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    04

    Tue

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

    Wed

  • ONT–BOI, 08/06/2026: From $284
    06

    Thu

  • ONT–BOI, 08/07/2026: From $279
    07

    Fri

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    08

    Sat

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

    Sun

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    10

    Mon

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

    Tue

  • ONT–BOI, 08/12/2026: From $284
    12

    Wed

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    13

    Thu

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    14

    Fri

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

    Sat

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    16

    Sun

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

    Mon

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    18

    Tue

  • ONT–BOI, 08/19/2026: From $224
    19

    Wed

  • ONT–BOI, 08/20/2026: From $219
    20

    Thu

  • ONT–BOI, 08/21/2026: From $164
    21

    Fri

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

    Sat

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    23

    Sun

  • ONT–BOI, 08/24/2026: From $163
    24

    Mon

  • ONT–BOI, 08/25/2026: From $159
    25

    Tue

  • ONT–BOI, 08/26/2026: From $159
    26

    Wed

  • ONT–BOI, 08/27/2026: From $194
    27

    Thu

  • ONT–BOI, 08/28/2026: From $164
    28

    Fri

  • ONT–BOI, 08/29/2026: From $94
    29

    Sat

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    30

    Sun

    • Range$94-$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:
    LA/Ontario International Airport
    Arriving at:
    Boise Airport
    Distance:
    660 miles

    Route Information

    132† 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 132 weekly flights from Ontario/LA to Boise on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Boise with Southwest, check out our Low Fare Calendar.
    You can rent a car at Boise Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Boise—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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