Southwest® flights from Ontario/LA to Boise from $119

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Low fares from Ontario/LA to Boise

$

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/15/2026

One-way

Basic

From
$119
Seen: 21 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 02/06/2027

One-way

Basic

From
$119
Seen: 16 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/16/2026

One-way

Basic

From
$119
Seen: 16 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/19/2026

One-way

Basic

From
$119
Seen: 22 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 01/12/2027

One-way

Basic

From
$119
Seen: 14 hrs ago

Ontario/LA (ONT)to

Boise (BOI)
Depart: 12/12/2026

One-way

Basic

From
$119
Seen: 21 minutes ago

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Explore flights from Ontario/LA to Boise

Nov 2026
From$152*
Seen: 16 hrs ago
One Way/Basic
Dec 2026
From$119*
Seen: 16 hrs ago
One Way/Basic
Jan 2027
From$119*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $119
cmp-daily-histogram-bars-legend-max-price-aria-label $205
Displaying fares for November-2026
  • ONT–BOI, 11/13/2026: From $167
    13

    Fri

    NOV

  • ONT–BOI, 11/14/2026: From $152
    14

    Sat

  • ONT–BOI, 11/15/2026: From $205
    15

    Sun

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

    Mon

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

    Tue

  • ONT–BOI, 11/18/2026: From $152
    18

    Wed

  • ONT–BOI, 11/19/2026: From $167
    19

    Thu

  • ONT–BOI, 11/20/2026: From $167
    20

    Fri

  • ONT–BOI, 11/21/2026: From $157
    21

    Sat

  • ONT–BOI, 11/22/2026: From $167
    22

    Sun

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

    Mon

  • ONT–BOI, 11/24/2026: From $152
    24

    Tue

  • ONT–BOI, 11/25/2026: From $200
    25

    Wed

  • ONT–BOI, 11/26/2026: From $167
    26

    Thu

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

    Fri

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

    Sat

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

    Sun

  • ONT–BOI, 11/30/2026: From $200
    30

    Mon

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

    Tue

    DEC

  • ONT–BOI, 12/02/2026: From $152
    02

    Wed

  • ONT–BOI, 12/03/2026: From $167
    03

    Thu

  • ONT–BOI, 12/04/2026: From $167
    04

    Fri

  • ONT–BOI, 12/05/2026: From $152
    05

    Sat

  • ONT–BOI, 12/06/2026: From $167
    06

    Sun

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

    Mon

  • ONT–BOI, 12/08/2026: From $152
    08

    Tue

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

    Wed

  • ONT–BOI, 12/10/2026: From $167
    10

    Thu

  • ONT–BOI: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

  • ONT–BOI, 12/12/2026: From $119
    12

    Sat

    • Range$119-$205

    *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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