Southwest® flights from Baltimore/Washington to Seattle/Tacoma from $199

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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
$199
Seen: 9 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 09/30/2026

One-way

Basic

From
$199
Seen: 3 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 09/27/2026

One-way

Basic

From
$199
Seen: 10 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/07/2026

One-way

Basic

From
$209
Seen: 14 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/15/2026

One-way

Basic

From
$209
Seen: 12 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 10/04/2026

One-way

Basic

From
$209
Seen: 11 hrs ago

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Explore flights from Baltimore/Washington to Seattle/Tacoma

Aug 2026
From$261*
Seen: 17 hrs ago
One Way/Basic
Sep 2026
From$199*
Seen: 3 hrs ago
One Way/Basic
Oct 2026
From$209*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $219
cmp-daily-histogram-bars-legend-max-price-aria-label $312
Displaying fares for August-2026
  • BWI–SEA: cmp-view-offers-disclaimer. Find Offers
    22

    Sat

    AUG

  • BWI–SEA, 08/23/2026: From $307
    23

    Sun

  • BWI–SEA, 08/24/2026: From $297
    24

    Mon

  • BWI–SEA, 08/25/2026: From $261
    25

    Tue

  • BWI–SEA, 08/26/2026: From $261
    26

    Wed

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

    Thu

  • BWI–SEA, 08/28/2026: From $307
    28

    Fri

  • BWI–SEA, 08/29/2026: From $261
    29

    Sat

  • BWI–SEA, 08/30/2026: From $302
    30

    Sun

  • BWI–SEA, 08/31/2026: From $307
    31

    Mon

  • BWI–SEA, 09/01/2026: From $261
    01

    Tue

    SEP

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

    Wed

  • BWI–SEA, 09/03/2026: From $307
    03

    Thu

  • BWI–SEA, 09/04/2026: From $312
    04

    Fri

  • BWI–SEA, 09/05/2026: From $261
    05

    Sat

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

    Sun

  • BWI–SEA, 09/07/2026: From $307
    07

    Mon

  • BWI–SEA, 09/08/2026: From $261
    08

    Tue

  • BWI–SEA, 09/09/2026: From $261
    09

    Wed

  • BWI–SEA, 09/10/2026: From $307
    10

    Thu

  • BWI–SEA, 09/11/2026: From $219
    11

    Fri

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

    Sat

  • BWI–SEA, 09/13/2026: From $219
    13

    Sun

  • BWI–SEA, 09/14/2026: From $219
    14

    Mon

  • BWI–SEA, 09/15/2026: From $219
    15

    Tue

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

    Wed

  • BWI–SEA, 09/17/2026: From $219
    17

    Thu

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

    Fri

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

    Sat

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

    Sun

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

    Mon

    • Range$219-$312

    *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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