Southwest® flights from Seattle/Tacoma to Boise from $124

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Low fares from Seattle/Tacoma to Boise

$

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/28/2026

One-way

Basic

From
$124
Seen: 7 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/30/2026

One-way

Basic

From
$124
Seen: 5 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 11/02/2026

One-way

Basic

From
$129
Seen: 6 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 11/06/2026

One-way

Basic

From
$129
Seen: 2 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/15/2026

One-way

Basic

From
$154
Seen: 3 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/14/2026

One-way

Basic

From
$154
Seen: 1 hour ago

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Explore flights from Seattle/Tacoma to Boise

Sep 2026
From$374*
Seen: 13 hrs ago
One Way/Basic
Oct 2026
From$124*
Seen: 5 hrs ago
One Way/Basic
Nov 2026
From$129*
Seen: 6 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $154
cmp-daily-histogram-bars-legend-max-price-aria-label $374
Displaying fares for September-2026
  • SEA–BOI, 09/23/2026: From $374
    23

    Wed

    SEP

  • SEA–BOI, 09/24/2026: From $374
    24

    Thu

  • SEA–BOI, 09/25/2026: From $374
    25

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

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

    Wed

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

    Thu

    OCT

  • SEA–BOI, 10/02/2026: From $289
    02

    Fri

  • SEA–BOI, 10/03/2026: From $289
    03

    Sat

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

    Sun

  • SEA–BOI, 10/05/2026: From $289
    05

    Mon

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

    Tue

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

    Wed

  • SEA–BOI: cmp-view-offers-disclaimer. Find Offers
    08

    Thu

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

    Fri

  • SEA–BOI, 10/10/2026: From $196
    10

    Sat

  • SEA–BOI, 10/11/2026: From $269
    11

    Sun

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

    Mon

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

    Tue

  • SEA–BOI, 10/14/2026: From $154
    14

    Wed

  • SEA–BOI, 10/15/2026: From $154
    15

    Thu

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

    Fri

  • SEA–BOI, 10/17/2026: From $154
    17

    Sat

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

    Sun

  • SEA–BOI: cmp-view-offers-disclaimer. Find Offers
    19

    Mon

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

    Tue

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

    Wed

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

    Thu

    • Range$154-$374

    *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:
    Seattle/Tacoma International Airport
    Arriving at:
    Boise Airport
    Distance:
    399 miles

    Route Information

    98† 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 98 weekly flights from Seattle/Tacoma to Boise on Southwest Airlines.
    To find the lowest fares by day and time to fly Seattle/Tacoma 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 Seattle/Tacoma 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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