Southwest® flights from Ontario/LA to Boise from $98

Promo Code

Low fares from Ontario/LA to Boise

$

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/21/2026

One-way

Basic

From
$98
Seen: 15 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/19/2026

One-way

Basic

From
$98
Seen: 16 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/02/2026

One-way

Basic

From
$98
Seen: 17 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/09/2026

One-way

Basic

From
$98
Seen: 10 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/14/2026

One-way

Basic

From
$98
Seen: 18 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 11/23/2026

One-way

Basic

From
$98
Seen: 18 hrs ago

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Explore flights from Ontario/LA to Boise

Oct 2026
From$147*
Seen: 7 hrs ago
One Way/Basic
Nov 2026
From$98*
Seen: 10 hrs ago
One Way/Basic
Dec 2026
From$98*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $98
cmp-daily-histogram-bars-legend-max-price-aria-label $162
Displaying fares for October-2026
  • ONT–BOI, 10/22/2026: From $162
    22

    Thu

    OCT

  • ONT–BOI, 10/23/2026: From $162
    23

    Fri

  • ONT–BOI, 10/24/2026: From $147
    24

    Sat

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    25

    Sun

  • ONT–BOI, 10/26/2026: From $162
    26

    Mon

  • ONT–BOI, 10/27/2026: From $147
    27

    Tue

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

  • ONT–BOI, 10/29/2026: From $162
    29

    Thu

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

    Fri

  • ONT–BOI, 10/31/2026: From $147
    31

    Sat

  • ONT–BOI, 11/01/2026: From $162
    01

    Sun

    NOV

  • ONT–BOI, 11/02/2026: From $162
    02

    Mon

  • ONT–BOI, 11/03/2026: From $147
    03

    Tue

  • ONT–BOI, 11/04/2026: From $147
    04

    Wed

  • ONT–BOI, 11/05/2026: From $162
    05

    Thu

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    06

    Fri

  • ONT–BOI, 11/07/2026: From $147
    07

    Sat

  • ONT–BOI, 11/08/2026: From $162
    08

    Sun

  • ONT–BOI, 11/09/2026: From $98
    09

    Mon

  • ONT–BOI, 11/10/2026: From $98
    10

    Tue

  • ONT–BOI, 11/11/2026: From $98
    11

    Wed

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

    Thu

  • ONT–BOI, 11/13/2026: From $134
    13

    Fri

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

    Sat

  • ONT–BOI, 11/15/2026: From $145
    15

    Sun

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

    Mon

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

    Tue

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

    Wed

  • ONT–BOI, 11/19/2026: From $98
    19

    Thu

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    20

    Fri

  • ONT–BOI, 11/21/2026: From $98
    21

    Sat

    • Range$98-$162

    *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

    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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