Southwest® flights from Boise to Seattle/Tacoma from $119

Promo Code

Low fares from Boise to Seattle/Tacoma

$

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/08/2026

One-way

Basic

From
$119
Seen: 7 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 01/06/2027

One-way

Basic

From
$119
Seen: 8 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 02/13/2027

One-way

Basic

From
$119
Seen: 3 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 01/27/2027

One-way

Basic

From
$119
Seen: 16 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 12/15/2026

One-way

Basic

From
$119
Seen: 19 hrs ago

Boise (BOI)to

Seattle/Tacoma (SEA)
Depart: 01/05/2027

One-way

Basic

From
$119
Seen: 8 hrs ago

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Explore flights from Boise to Seattle/Tacoma

Nov 2026
From$254*
Seen: 5 hrs ago
One Way/Basic
Dec 2026
From$119*
Seen: 7 hrs ago
One Way/Basic
Jan 2027
From$119*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $119
cmp-daily-histogram-bars-legend-max-price-aria-label $410
Displaying fares for November-2026
  • BOI–SEA, 11/09/2026: From $389
    09

    Mon

    NOV

  • BOI–SEA, 11/10/2026: From $389
    10

    Tue

  • BOI–SEA, 11/11/2026: From $389
    11

    Wed

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

    Thu

  • BOI–SEA, 11/13/2026: From $389
    13

    Fri

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

    Sat

  • BOI–SEA, 11/15/2026: From $304
    15

    Sun

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

    Mon

  • BOI–SEA, 11/17/2026: From $304
    17

    Tue

  • BOI–SEA, 11/18/2026: From $304
    18

    Wed

  • BOI–SEA, 11/19/2026: From $309
    19

    Thu

  • BOI–SEA, 11/20/2026: From $304
    20

    Fri

  • BOI–SEA, 11/21/2026: From $304
    21

    Sat

  • BOI–SEA, 11/22/2026: From $254
    22

    Sun

  • BOI–SEA, 11/23/2026: From $254
    23

    Mon

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

    Tue

  • BOI–SEA, 11/25/2026: From $254
    25

    Wed

  • BOI–SEA, 11/26/2026: From $254
    26

    Thu

  • BOI–SEA, 11/27/2026: From $254
    27

    Fri

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

    Sat

  • BOI–SEA, 11/29/2026: From $410
    29

    Sun

  • BOI–SEA, 11/30/2026: From $259
    30

    Mon

  • BOI–SEA, 12/01/2026: From $209
    01

    Tue

    DEC

  • BOI–SEA, 12/02/2026: From $194
    02

    Wed

  • BOI–SEA, 12/03/2026: From $209
    03

    Thu

  • BOI–SEA, 12/04/2026: From $194
    04

    Fri

  • BOI–SEA, 12/05/2026: From $169
    05

    Sat

  • BOI–SEA, 12/06/2026: From $209
    06

    Sun

  • BOI–SEA, 12/07/2026: From $189
    07

    Mon

  • BOI–SEA, 12/08/2026: From $119
    08

    Tue

    • Range$119-$410

    *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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