Southwest® flights from Baltimore/Washington to Seattle/Tacoma from $109

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Low fares from Baltimore/Washington to Seattle/Tacoma

$

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 07/14/2026

One-way

Basic

From
$109
Seen: 13 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 06/09/2026

One-way

Basic

From
$145
Seen: 7 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 07/28/2026

One-way

Basic

From
$150
Seen: 14 hrs ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 07/21/2026

One-way

Basic

From
$150
Seen: 1 hour ago

Baltimore/Washington (BWI)to

Seattle/Tacoma (SEA)
Depart: 07/14/2026

One-way

Choice

From
$154
Seen: 13 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$160
Seen: 1 hour ago

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Explore flights from Baltimore/Washington to Seattle/Tacoma

Apr 2026
From$296*
Seen: 1 hour ago
One Way/Basic
May 2026
From$219*
Seen: 23 hrs ago
One Way/Basic
Jun 2026
From$145*
Seen: 7 hrs ago
One Way/Basic
$219
$410
Displaying fares for April-2026
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    • Range$219-$410

    *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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