Southwest® flights from Seattle/Tacoma to Boise from $114

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Low fares from Seattle/Tacoma to Boise

$

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 11/04/2026

One-way

Basic

From
$114
Seen: 10 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/14/2026

One-way

Basic

From
$114
Seen: 7 minutes ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/10/2026

One-way

Basic

From
$114
Seen: 22 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/03/2026

One-way

Basic

From
$114
Seen: 7 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/07/2026

One-way

Basic

From
$114
Seen: 18 hrs ago

Seattle/Tacoma (SEA)to

Boise (BOI)
Depart: 10/13/2026

One-way

Basic

From
$114
Seen: 20 hrs ago

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Explore flights from Seattle/Tacoma to Boise

Sep 2026
From$211*
Seen: 13 hrs ago
One Way/Basic
Oct 2026
From$114*
Seen: 22 hrs ago
One Way/Basic
Nov 2026
From$114*
Seen: 10 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $124
cmp-daily-histogram-bars-legend-max-price-aria-label $773
Displaying fares for September-2026
  • SEA–BOI: cmp-view-offers-disclaimer. Find Offers
    03

    Thu

    SEP

  • SEA–BOI, 09/04/2026: From $515
    04

    Fri

  • SEA–BOI, 09/05/2026: From $327
    05

    Sat

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

    Sun

  • SEA–BOI, 09/07/2026: From $773
    07

    Mon

  • SEA–BOI, 09/08/2026: From $322
    08

    Tue

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

    Wed

  • SEA–BOI, 09/10/2026: From $274
    10

    Thu

  • SEA–BOI, 09/11/2026: From $344
    11

    Fri

  • SEA–BOI, 09/12/2026: From $269
    12

    Sat

  • SEA–BOI, 09/13/2026: From $493
    13

    Sun

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

    Mon

  • SEA–BOI: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • SEA–BOI, 09/16/2026: From $211
    16

    Wed

  • SEA–BOI, 09/17/2026: From $459
    17

    Thu

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

    Fri

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

    Sat

  • SEA–BOI, 09/20/2026: From $515
    20

    Sun

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

    Mon

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

    Tue

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

    Wed

  • SEA–BOI: cmp-view-offers-disclaimer. Find Offers
    24

    Thu

  • SEA–BOI: cmp-view-offers-disclaimer. Find Offers
    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, 10/01/2026: From $184
    01

    Thu

    OCT

  • SEA–BOI, 10/02/2026: From $124
    02

    Fri

    • Range$124-$773

    *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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