Southwest® flights from Baltimore/Washington to Seattle/Tacoma from $209

Promo Code

Low fares from Baltimore/Washington to Seattle/Tacoma

$

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 10/31/2026

One-way

Basic

From
$209
Seen: 11 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 01/09/2027

One-way

Basic

From
$209
Seen: 8 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$209
Seen: 5 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 11/18/2026

One-way

Basic

From
$209
Seen: 14 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$209
Seen: 2 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 12/05/2026

One-way

Basic

From
$209
Seen: 19 hrs ago

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Explore flights from Baltimore/Washington to Seattle/Tacoma

Oct 2026
From$209*
Seen: 11 hrs ago
One Way/Basic
Nov 2026
From$209*
Seen: 14 hrs ago
One Way/Basic
Dec 2026
From$209*
Seen: 19 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $209
cmp-daily-histogram-bars-legend-max-price-aria-label $327
Displaying fares for October-2026
  • BWI–SEA: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

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

    Fri

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

    Sat

  • BWI–SEA, 10/04/2026: From $327
    04

    Sun

  • BWI–SEA, 10/05/2026: From $327
    05

    Mon

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

    Tue

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

    Wed

  • BWI–SEA, 10/08/2026: From $327
    08

    Thu

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

    Fri

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

    Sat

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

    Sun

  • BWI–SEA, 10/12/2026: From $327
    12

    Mon

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

    Tue

  • BWI–SEA, 10/14/2026: From $281
    14

    Wed

  • BWI–SEA, 10/15/2026: From $327
    15

    Thu

  • BWI–SEA, 10/16/2026: From $327
    16

    Fri

  • BWI–SEA, 10/17/2026: From $281
    17

    Sat

  • BWI–SEA, 10/18/2026: From $327
    18

    Sun

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

    Mon

  • BWI–SEA, 10/20/2026: From $281
    20

    Tue

  • BWI–SEA, 10/21/2026: From $219
    21

    Wed

  • BWI–SEA, 10/22/2026: From $224
    22

    Thu

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

    Fri

  • BWI–SEA, 10/24/2026: From $219
    24

    Sat

  • BWI–SEA, 10/25/2026: From $254
    25

    Sun

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

    Mon

  • BWI–SEA, 10/27/2026: From $219
    27

    Tue

  • BWI–SEA, 10/28/2026: From $219
    28

    Wed

  • BWI–SEA, 10/29/2026: From $219
    29

    Thu

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

    Fri

  • BWI–SEA, 10/31/2026: From $209
    31

    Sat

    • Range$209-$327

    *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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