Southwest® flights from Ontario/LA to Boise from $114

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Low fares from Ontario/LA to Boise

$

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/08/2026

One-way

Basic

From
$114
Seen: 13 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/04/2026

One-way

Basic

From
$114
Seen: 7 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 10/31/2026

One-way

Basic

From
$114
Seen: 13 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/17/2026

One-way

Basic

From
$114
Seen: 12 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/05/2026

One-way

Basic

From
$114
Seen: 19 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 10/28/2026

One-way

Basic

From
$114
Seen: 23 hrs ago

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Explore flights from Ontario/LA to Boise

Sep 2026
From$137*
Seen: 14 hrs ago
One Way/Basic
Oct 2026
From$114*
Seen: 13 hrs ago
One Way/Basic
Nov 2026
From$114*
Seen: 12 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $114
cmp-daily-histogram-bars-legend-max-price-aria-label $235
Displaying fares for September-2026
  • ONT–BOI, 09/30/2026: From $137
    30

    Wed

    SEP

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

  • ONT–BOI, 10/02/2026: From $152
    02

    Fri

  • ONT–BOI, 10/03/2026: From $137
    03

    Sat

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

    Sun

  • ONT–BOI, 10/05/2026: From $152
    05

    Mon

  • ONT–BOI, 10/06/2026: From $137
    06

    Tue

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • ONT–BOI, 10/08/2026: From $152
    08

    Thu

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

    Fri

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

    Sat

  • ONT–BOI, 10/11/2026: From $220
    11

    Sun

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    12

    Mon

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

    Tue

  • ONT–BOI, 10/14/2026: From $137
    14

    Wed

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

    Thu

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

    Fri

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    17

    Sat

  • ONT–BOI, 10/18/2026: From $235
    18

    Sun

  • ONT–BOI, 10/19/2026: From $152
    19

    Mon

  • ONT–BOI, 10/20/2026: From $137
    20

    Tue

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

    Wed

  • ONT–BOI, 10/22/2026: From $152
    22

    Thu

  • ONT–BOI, 10/23/2026: From $152
    23

    Fri

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    24

    Sat

  • ONT–BOI, 10/25/2026: From $200
    25

    Sun

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

    Mon

  • ONT–BOI, 10/27/2026: From $137
    27

    Tue

  • ONT–BOI, 10/28/2026: From $114
    28

    Wed

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

    Thu

    • Range$114-$235

    *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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