Spirit Airlines Customers: Southwest has options for Customers holding Spirit reservations. We’re here to help you continue your journey. Learn more.

Southwest® flights from Boston to Boise from $143

Promo Code

Low fares from Boston to Boise

$

Boston (BOS)to

Boise (BOI)
Depart: 05/29/2026

One-way

Basic

From
$143
Seen: 13 hrs ago

Boston (BOS)to

Boise (BOI)
Depart: 06/11/2026

One-way

Basic

From
$143
Seen: 14 hrs ago

Boston (BOS)to

Boise (BOI)
Depart: 06/05/2026

One-way

Basic

From
$173
Seen: 18 hrs ago

Boston (BOS)to

Boise (BOI)
Depart: 05/29/2026

One-way

Choice

From
$188
Seen: 13 hrs ago

Boston (BOS)to

Boise (BOI)
Depart: 06/11/2026

One-way

Choice

From
$188
Seen: 14 hrs ago

Boston (BOS)to

Boise (BOI)
Depart: 06/05/2026

One-way

Choice

From
$218
Seen: 18 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 Boston to Boise

May 2026
From$143*
Seen: 13 hrs ago
One Way/Basic
Jun 2026
From$143*
Seen: 14 hrs ago
One Way/Basic
Jul 2026
From$244*
Seen: 14 hrs ago
One Way/Basic
$143
Displaying fares for May-2026
  • 05

    Tue

    MAY

  • 06

    Wed

  • 07

    Thu

  • 08

    Fri

  • 09

    Sat

  • 10

    Sun

  • 11

    Mon

  • 12

    Tue

  • 13

    Wed

  • 14

    Thu

  • 15

    Fri

  • 16

    Sat

  • 17

    Sun

  • 18

    Mon

  • 19

    Tue

  • 20

    Wed

  • 21

    Thu

  • 22

    Fri

  • 23

    Sat

  • 24

    Sun

  • 25

    Mon

  • 26

    Tue

  • 27

    Wed

  • 28

    Thu

  • 29

    Fri

  • 30

    Sat

  • 31

    Sun

  • 01

    Mon

    JUN

  • 02

    Tue

  • 03

    Wed

  • 04

    Thu

    • Range$143-$551

    *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:
    Logan International Airport
    Arriving at:
    Boise Airport
    Distance:
    2265 miles

    Route Information

    47† 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 47 weekly flights from Boston to Boise on Southwest Airlines.
    To find the lowest fares by day and time to fly Boston 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 Boston 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 Boston