Southwest® flights from Ontario/LA to Boise from $104

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Low fares from Ontario/LA to Boise

$

Ontario/LA (ONT)to

Boise (BOI)
Depart: 10/07/2026

One-way

Basic

From
$104
Seen: 22 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/04/2026

One-way

Basic

From
$104
Seen: 12 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/14/2026

One-way

Basic

From
$104
Seen: 15 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 09/26/2026

One-way

Basic

From
$104
Seen: 17 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 09/28/2026

One-way

Basic

From
$114
Seen: 18 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 10/15/2026

One-way

Basic

From
$114
Seen: 17 hrs ago

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Explore flights from Ontario/LA to Boise

Aug 2026
From$127*
Seen: 11 hrs ago
One Way/Basic
Sep 2026
From$104*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$104*
Seen: 22 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $127
cmp-daily-histogram-bars-legend-max-price-aria-label $220
Displaying fares for August-2026
  • ONT–BOI, 08/20/2026: From $180
    20

    Thu

    AUG

  • ONT–BOI, 08/21/2026: From $142
    21

    Fri

  • ONT–BOI, 08/22/2026: From $127
    22

    Sat

  • ONT–BOI, 08/23/2026: From $200
    23

    Sun

  • ONT–BOI, 08/24/2026: From $180
    24

    Mon

  • ONT–BOI, 08/25/2026: From $127
    25

    Tue

  • ONT–BOI, 08/26/2026: From $127
    26

    Wed

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    27

    Thu

  • ONT–BOI, 08/28/2026: From $180
    28

    Fri

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

  • ONT–BOI, 08/30/2026: From $180
    30

    Sun

  • ONT–BOI, 08/31/2026: From $137
    31

    Mon

  • ONT–BOI, 09/01/2026: From $127
    01

    Tue

    SEP

  • ONT–BOI, 09/02/2026: From $127
    02

    Wed

  • ONT–BOI, 09/03/2026: From $180
    03

    Thu

  • ONT–BOI, 09/04/2026: From $180
    04

    Fri

  • ONT–BOI, 09/05/2026: From $127
    05

    Sat

  • ONT–BOI, 09/06/2026: From $142
    06

    Sun

  • ONT–BOI, 09/07/2026: From $220
    07

    Mon

  • ONT–BOI, 09/08/2026: From $150
    08

    Tue

  • ONT–BOI, 09/09/2026: From $127
    09

    Wed

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

    Thu

  • ONT–BOI, 09/11/2026: From $142
    11

    Fri

  • ONT–BOI, 09/12/2026: From $150
    12

    Sat

  • ONT–BOI, 09/13/2026: From $142
    13

    Sun

  • ONT–BOI, 09/14/2026: From $137
    14

    Mon

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

    Tue

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

    Wed

  • ONT–BOI, 09/17/2026: From $142
    17

    Thu

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

    Fri

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

    • Range$127-$220

    *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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