Southwest® flights from Seattle/Tacoma to Boston from $224

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Low fares from Seattle/Tacoma to Boston

$

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 12/16/2026

One-way

Basic

From
$224
Seen: 16 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 01/19/2027

One-way

Basic

From
$224
Seen: 4 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 12/22/2026

One-way

Basic

From
$239
Seen: 16 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 12/25/2026

One-way

Basic

From
$239
Seen: 13 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 01/08/2027

One-way

Basic

From
$239
Seen: 17 hrs ago

Seattle/Tacoma (SEA)to

Boston (BOS)
Depart: 02/01/2027

One-way

Basic

From
$239
Seen: 9 hrs ago

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Explore flights from Seattle/Tacoma to Boston

Nov 2026
From$294*
Seen: 6 hrs ago
One Way/Basic
Dec 2026
From$224*
Seen: 16 hrs ago
One Way/Basic
Jan 2027
From$224*
Seen: 4 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $294
Displaying fares for November-2026
  • SEA–BOS, 11/10/2026: From $454
    10

    Tue

    NOV

  • SEA–BOS, 11/11/2026: From $454
    11

    Wed

  • SEA–BOS, 11/12/2026: From $394
    12

    Thu

  • SEA–BOS, 11/13/2026: From $394
    13

    Fri

  • SEA–BOS, 11/14/2026: From $394
    14

    Sat

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

    Sun

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    16

    Mon

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    17

    Tue

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    18

    Wed

  • SEA–BOS, 11/19/2026: From $294
    19

    Thu

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

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

  • SEA–BOS: cmp-view-offers-disclaimer. Find Offers
    25

    Wed

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

    Thu

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

    Fri

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

    Sat

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

    Sun

  • SEA–BOS, 11/30/2026: From $339
    30

    Mon

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

    Tue

    DEC

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

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  • SEA–BOS: cmp-view-offers-disclaimer. Find Offers
    03

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

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

    Sat

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

    Sun

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    07

    Mon

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    08

    Tue

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

    Wed

    • Range$294-$454

    *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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