Southwest® flights from Baltimore/Washington to Seattle/Tacoma from $84

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Low fares from Baltimore/Washington to Seattle/Tacoma

$

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 09/26/2026

One-way

Basic

From
$84
Seen: 18 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 09/29/2026

One-way

Basic

From
$84
Seen: 4 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 10/20/2026

One-way

Basic

From
$94
Seen: 18 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 09/15/2026

One-way

Basic

From
$94
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/03/2026

One-way

Basic

From
$94
Seen: 21 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 09/12/2026

One-way

Basic

From
$94
Seen: 22 hrs ago

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Explore flights from Baltimore/Washington to Seattle/Tacoma

Aug 2026
From$94*
Seen: 6 hrs ago
One Way/Basic
Sep 2026
From$84*
Seen: 4 hrs ago
One Way/Basic
Oct 2026
From$94*
Seen: 11 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $94
cmp-daily-histogram-bars-legend-max-price-aria-label $384
Displaying fares for August-2026
  • BWI–SEA: cmp-view-offers-disclaimer. Find Offers
    01

    Sat

    AUG

  • BWI–SEA, 08/02/2026: From $384
    02

    Sun

  • BWI–SEA, 08/03/2026: From $384
    03

    Mon

  • BWI–SEA, 08/04/2026: From $374
    04

    Tue

  • BWI–SEA, 08/05/2026: From $384
    05

    Wed

  • BWI–SEA, 08/06/2026: From $384
    06

    Thu

  • BWI–SEA, 08/07/2026: From $344
    07

    Fri

  • BWI–SEA, 08/08/2026: From $344
    08

    Sat

  • BWI–SEA, 08/09/2026: From $339
    09

    Sun

  • BWI–SEA, 08/10/2026: From $344
    10

    Mon

  • BWI–SEA, 08/11/2026: From $334
    11

    Tue

  • BWI–SEA, 08/12/2026: From $334
    12

    Wed

  • BWI–SEA, 08/13/2026: From $344
    13

    Thu

  • BWI–SEA, 08/14/2026: From $319
    14

    Fri

  • BWI–SEA, 08/15/2026: From $309
    15

    Sat

  • BWI–SEA, 08/16/2026: From $359
    16

    Sun

  • BWI–SEA, 08/17/2026: From $364
    17

    Mon

  • BWI–SEA, 08/18/2026: From $309
    18

    Tue

  • BWI–SEA, 08/19/2026: From $309
    19

    Wed

  • BWI–SEA, 08/20/2026: From $319
    20

    Thu

  • BWI–SEA, 08/21/2026: From $228
    21

    Fri

  • BWI–SEA, 08/22/2026: From $228
    22

    Sat

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

    Sun

  • BWI–SEA, 08/24/2026: From $228
    24

    Mon

  • BWI–SEA, 08/25/2026: From $218
    25

    Tue

  • BWI–SEA, 08/26/2026: From $228
    26

    Wed

  • BWI–SEA, 08/27/2026: From $228
    27

    Thu

  • BWI–SEA, 08/28/2026: From $228
    28

    Fri

  • BWI–SEA, 08/29/2026: From $228
    29

    Sat

  • BWI–SEA, 08/30/2026: From $174
    30

    Sun

  • BWI–SEA, 08/31/2026: From $94
    31

    Mon

    • Range$94-$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:
    Balt./Wash. International Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Average flight time:
    5 hours 50 minutes
    Distance:
    2335 miles

    Route Information

    142† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    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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