Southwest® flights from Seattle/Tacoma to Boston from $156

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Low fares from Seattle/Tacoma to Boston

$

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 01/06/2027

One-way

Basic

From
$156
Seen: 1 hour ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 12/02/2026

One-way

Basic

From
$156
Seen: 11 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 12/16/2026

One-way

Basic

From
$156
Seen: 15 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 01/05/2027

One-way

Basic

From
$156
Seen: 1 hour ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 11/09/2026

One-way

Basic

From
$174
Seen: 6 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 12/02/2026

One-way

Choice

From
$214
Seen: 11 hrs ago

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Explore flights from Seattle/Tacoma to Boston

Oct 2026
From$389*
Seen: 21 hrs ago
One Way/Basic
Nov 2026
From$174*
Seen: 6 hrs ago
One Way/Basic
Dec 2026
From$156*
Seen: 15 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $174
Displaying fares for October-2026
  • SEA–BOS, 10/21/2026: From $449
    21

    Wed

    OCT

  • SEA–BOS, 10/22/2026: From $449
    22

    Thu

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

    Fri

  • SEA–BOS, 10/24/2026: From $389
    24

    Sat

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    25

    Sun

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    26

    Mon

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    27

    Tue

  • SEA–BOS, 10/28/2026: From $419
    28

    Wed

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    29

    Thu

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    30

    Fri

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    31

    Sat

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

    Sun

    NOV

  • SEA–BOS: cmp-view-offers-disclaimer. Find Offers
    02

    Mon

  • SEA–BOS, 11/03/2026: From $314
    03

    Tue

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

    Wed

  • SEA–BOS: cmp-view-offers-disclaimer. Find Offers
    05

    Thu

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    06

    Fri

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

    Sat

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

    Sun

  • SEA–BOS, 11/09/2026: From $174
    09

    Mon

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

    Tue

  • SEA–BOS, 11/11/2026: From $244
    11

    Wed

  • SEA–BOS, 11/12/2026: From $244
    12

    Thu

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

    Fri

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

    Sat

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

    Sun

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

    Mon

  • SEA–BOS: cmp-view-offers-disclaimer. Find Offers
    17

    Tue

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

    Wed

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

    Thu

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

    Fri

    • Range$174-$449

    *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:
    Logan International Airport
    Distance:
    2496 miles

    Questions we hear the most

    There are 64 weekly flights from Seattle/Tacoma to Boston on Southwest Airlines.
    To find the lowest fares by day and time to fly Seattle/Tacoma to Boston with Southwest, check out our Low Fare Calendar.
    You can rent a car at Logan International Airport book yours with your flight.
    Yes! Flights from Seattle/Tacoma to Boston—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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