Southwest® flights from Baltimore/Washington to Seattle/Tacoma from $129

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Low fares from Baltimore/Washington to Seattle/Tacoma

$

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 12/02/2026

One-way

Basic

From
$129
Seen: 18 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$129
Seen: 9 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/14/2026

One-way

Basic

From
$129
Seen: 4 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/10/2026

One-way

Basic

From
$129
Seen: 12 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 01/11/2027

One-way

Basic

From
$129
Seen: 6 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 12/16/2026

One-way

Basic

From
$129
Seen: 9 hrs ago

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Explore flights from Baltimore/Washington to Seattle/Tacoma

Oct 2026
From$224*
Seen: 23 hrs ago
One Way/Basic
Nov 2026
From$129*
Seen: 12 hrs ago
One Way/Basic
Dec 2026
From$129*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $129
cmp-daily-histogram-bars-legend-max-price-aria-label $268
Displaying fares for October-2026
  • BWI–SEA: cmp-view-offers-disclaimer. Find Offers
    23

    Fri

    OCT

  • BWI–SEA, 10/24/2026: From $224
    24

    Sat

  • BWI–SEA, 10/25/2026: From $263
    25

    Sun

  • BWI–SEA, 10/26/2026: From $263
    26

    Mon

  • BWI–SEA, 10/27/2026: From $224
    27

    Tue

  • BWI–SEA, 10/28/2026: From $224
    28

    Wed

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

    Thu

  • BWI–SEA: cmp-view-offers-disclaimer. Find Offers
    30

    Fri

  • BWI–SEA, 10/31/2026: From $224
    31

    Sat

  • BWI–SEA, 11/01/2026: From $268
    01

    Sun

    NOV

  • BWI–SEA, 11/02/2026: From $234
    02

    Mon

  • BWI–SEA, 11/03/2026: From $224
    03

    Tue

  • BWI–SEA, 11/04/2026: From $224
    04

    Wed

  • BWI–SEA, 11/05/2026: From $234
    05

    Thu

  • BWI–SEA, 11/06/2026: From $239
    06

    Fri

  • BWI–SEA, 11/07/2026: From $224
    07

    Sat

  • BWI–SEA, 11/08/2026: From $234
    08

    Sun

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

    Mon

  • BWI–SEA, 11/10/2026: From $129
    10

    Tue

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

    Wed

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

    Thu

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

    Fri

  • BWI–SEA, 11/14/2026: From $129
    14

    Sat

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

    Sun

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

    Mon

  • BWI–SEA, 11/17/2026: From $129
    17

    Tue

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

    Wed

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

    Thu

  • BWI–SEA, 11/20/2026: From $186
    20

    Fri

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

    Sat

  • BWI–SEA, 11/22/2026: From $181
    22

    Sun

    • Range$129-$268

    *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:
    Balt./Wash. International Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Average flight time:
    5 hours 50 minutes
    Distance:
    2335 miles

    Questions we hear the most

    The average flight time from Baltimore/Washington to Seattle/Tacoma is 5 hours 50 minutes.
    There are 142 weekly flights from Baltimore/Washington to Seattle/Tacoma on Southwest Airlines.
    Yes, Southwest flies nonstop from Baltimore/Washington to Seattle/Tacoma once per day from Monday through Friday.
    To find the lowest fares by day and time to fly Baltimore/Washington 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 Baltimore/Washington 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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