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

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Low fares from Boise to Seattle/Tacoma

$

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/13/2026

One-way

Basic

From
$124
Seen: 15 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/14/2026

One-way

Basic

From
$124
Seen: 7 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/06/2026

One-way

Basic

From
$124
Seen: 15 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 11/23/2026

One-way

Basic

From
$124
Seen: 14 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/11/2026

One-way

Basic

From
$124
Seen: 57 minutes ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/25/2026

One-way

Basic

From
$129
Seen: 21 hrs ago

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Explore flights from Boise to Seattle/Tacoma

Oct 2026
From$299*
Seen: 21 hrs ago
One Way/Basic
Nov 2026
From$124*
Seen: 14 hrs ago
One Way/Basic
Dec 2026
From$124*
Seen: 57 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $204
cmp-daily-histogram-bars-legend-max-price-aria-label $384
Displaying fares for October-2026
  • BOI–SEA, 10/19/2026: From $384
    19

    Mon

    OCT

  • BOI–SEA, 10/20/2026: From $384
    20

    Tue

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

    Wed

  • BOI–SEA, 10/22/2026: From $384
    22

    Thu

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

    Fri

  • BOI–SEA, 10/24/2026: From $384
    24

    Sat

  • BOI–SEA, 10/25/2026: From $304
    25

    Sun

  • BOI–SEA, 10/26/2026: From $299
    26

    Mon

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

    Tue

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

    Wed

  • BOI–SEA, 10/29/2026: From $299
    29

    Thu

  • BOI–SEA, 10/30/2026: From $304
    30

    Fri

  • BOI–SEA: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

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

    Sun

    NOV

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    02

    Mon

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    03

    Tue

  • BOI–SEA, 11/04/2026: From $249
    04

    Wed

  • BOI–SEA, 11/05/2026: From $249
    05

    Thu

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

    Fri

  • BOI–SEA, 11/07/2026: From $249
    07

    Sat

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

    Sun

  • BOI–SEA, 11/09/2026: From $204
    09

    Mon

  • BOI–SEA: cmp-view-offers-disclaimer. Find Offers
    10

    Tue

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

    Wed

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    12

    Thu

  • BOI–SEA, 11/13/2026: From $204
    13

    Fri

  • BOI–SEA, 11/14/2026: From $204
    14

    Sat

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

    Sun

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

    Mon

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    17

    Tue

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

    Wed

    • Range$204-$384

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

    Questions we hear the most

    There are 124 weekly flights from Boise to Seattle/Tacoma on Southwest Airlines.
    To find the lowest fares by day and time to fly Boise to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
    You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
    Yes! Flights from Boise to Seattle/Tacoma—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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