Southwest® flights from Phoenix to Boise from $99

Promo Code

Low fares from Phoenix to Boise

$

Phoenix (PHX)to

Boise (BOI)
Depart: 10/17/2026

One-way

Basic

From
$99
Seen: 19 hrs ago

Phoenix (PHX)to

Boise (BOI)
Depart: 10/03/2026

One-way

Basic

From
$99
Seen: 1 hour ago

Phoenix (PHX)to

Boise (BOI)
Depart: 10/28/2026

One-way

Basic

From
$99
Seen: 8 minutes ago

Phoenix (PHX)to

Boise (BOI)
Depart: 09/29/2026

One-way

Basic

From
$99
Seen: 35 minutes ago

Phoenix (PHX)to

Boise (BOI)
Depart: 11/07/2026

One-way

Basic

From
$99
Seen: 4 hrs ago

Phoenix (PHX)to

Boise (BOI)
Depart: 09/30/2026

One-way

Basic

From
$99
Seen: 6 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Phoenix to Boise

Aug 2026
From$99*
Seen: 4 hrs ago
One Way/Basic
Sep 2026
From$99*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$99*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $99
cmp-daily-histogram-bars-legend-max-price-aria-label $242
Displaying fares for August-2026
  • PHX–BOI, 08/01/2026: From $214
    01

    Sat

    AUG

  • PHX–BOI, 08/02/2026: From $242
    02

    Sun

  • PHX–BOI, 08/03/2026: From $242
    03

    Mon

  • PHX–BOI, 08/04/2026: From $214
    04

    Tue

  • PHX–BOI, 08/05/2026: From $214
    05

    Wed

  • PHX–BOI, 08/06/2026: From $242
    06

    Thu

  • PHX–BOI, 08/07/2026: From $224
    07

    Fri

  • PHX–BOI, 08/08/2026: From $224
    08

    Sat

  • PHX–BOI, 08/09/2026: From $224
    09

    Sun

  • PHX–BOI, 08/10/2026: From $224
    10

    Mon

  • PHX–BOI, 08/11/2026: From $214
    11

    Tue

  • PHX–BOI, 08/12/2026: From $214
    12

    Wed

  • PHX–BOI, 08/13/2026: From $224
    13

    Thu

  • PHX–BOI, 08/14/2026: From $184
    14

    Fri

  • PHX–BOI, 08/15/2026: From $184
    15

    Sat

  • PHX–BOI, 08/16/2026: From $184
    16

    Sun

  • PHX–BOI, 08/17/2026: From $184
    17

    Mon

  • PHX–BOI, 08/18/2026: From $224
    18

    Tue

  • PHX–BOI, 08/19/2026: From $184
    19

    Wed

  • PHX–BOI, 08/20/2026: From $184
    20

    Thu

  • PHX–BOI, 08/21/2026: From $159
    21

    Fri

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

    Sat

  • PHX–BOI, 08/23/2026: From $159
    23

    Sun

  • PHX–BOI, 08/24/2026: From $159
    24

    Mon

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

    Tue

  • PHX–BOI, 08/26/2026: From $99
    26

    Wed

  • PHX–BOI, 08/27/2026: From $109
    27

    Thu

  • PHX–BOI, 08/28/2026: From $109
    28

    Fri

  • PHX–BOI, 08/29/2026: From $99
    29

    Sat

  • PHX–BOI, 08/30/2026: From $129
    30

    Sun

  • PHX–BOI, 08/31/2026: From $109
    31

    Mon

    • Range$99-$242

    *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:
    Sky Harbor International Airport
    Arriving at:
    Boise Airport
    Average flight time:
    2 hours 7 minutes
    Distance:
    735 miles

    Route Information

    134† Weekly flights
    • 2‡ Nonstop flights per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 2‡ Nonstop flights on Sunday

    † 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

    The average flight time from Phoenix to Boise is 2 hours 7 minutes.
    There are 134 weekly flights from Phoenix to Boise on Southwest Airlines.
    Yes, Southwest flies nonstop from Phoenix to Boise 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Phoenix to Boise once per day on Saturdays and 2 times per day on Sundays.
    To find the lowest fares by day and time to fly Phoenix 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 Phoenix 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.

    Explore Flights from Other Popular Origins

    Popular Flights from Phoenix