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: 12/15/2026

One-way

Basic

From
$199
Seen: 23 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/12/2026

One-way

Basic

From
$199
Seen: 17 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$199
Seen: 19 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 12/14/2026

One-way

Basic

From
$199
Seen: 13 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$199
Seen: 10 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 10/28/2026

One-way

Basic

From
$199
Seen: 3 hrs ago

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Explore flights from Baltimore/Washington to Seattle/Tacoma

Sep 2026
From$271*
Seen: 40 minutes ago
One Way/Basic
Oct 2026
From$199*
Seen: 22 hrs ago
One Way/Basic
Nov 2026
From$199*
Seen: 11 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $199
cmp-daily-histogram-bars-legend-max-price-aria-label $382
Displaying fares for September-2026
  • BWI–SEA, 09/25/2026: From $327
    25

    Fri

    SEP

  • BWI–SEA, 09/26/2026: From $271
    26

    Sat

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

    Sun

  • BWI–SEA, 09/28/2026: From $327
    28

    Mon

  • BWI–SEA, 09/29/2026: From $271
    29

    Tue

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

    Wed

  • BWI–SEA, 10/01/2026: From $327
    01

    Thu

    OCT

  • BWI–SEA, 10/02/2026: From $327
    02

    Fri

  • BWI–SEA, 10/03/2026: From $281
    03

    Sat

  • BWI–SEA, 10/04/2026: From $382
    04

    Sun

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

    Mon

  • BWI–SEA, 10/06/2026: From $281
    06

    Tue

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

    Wed

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

    Thu

  • BWI–SEA, 10/09/2026: From $327
    09

    Fri

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

    Sat

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

    Sun

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

    Mon

  • BWI–SEA, 10/13/2026: From $281
    13

    Tue

  • BWI–SEA, 10/14/2026: From $199
    14

    Wed

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

    Thu

  • BWI–SEA, 10/16/2026: From $215
    16

    Fri

  • BWI–SEA, 10/17/2026: From $199
    17

    Sat

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

    Sun

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

    Mon

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    20

    Tue

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    21

    Wed

  • BWI–SEA, 10/22/2026: From $215
    22

    Thu

  • BWI–SEA, 10/23/2026: From $215
    23

    Fri

  • BWI–SEA, 10/24/2026: From $199
    24

    Sat

    • Range$199-$382

    *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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