Southwest® flights from Detroit to Seattle/Tacoma from $234

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Low fares from Detroit to Seattle/Tacoma

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Detroit (DTW)to

Seattle/Tacoma (SEA)
Depart: 10/23/2026

One-way

Basic

From
$234
Seen: 18 hrs ago

Detroit (DTW)to

Seattle/Tacoma (SEA)
Depart: 09/17/2026

One-way

Basic

From
$234
Seen: 16 hrs ago

Detroit (DTW)to

Seattle/Tacoma (SEA)
Depart: 10/18/2026

One-way

Basic

From
$260
Seen: 12 hrs ago

Detroit (DTW)to

Seattle/Tacoma (SEA)
Depart: 08/22/2026

One-way

Basic

From
$265
Seen: 22 hrs ago

Detroit (DTW)to

Seattle/Tacoma (SEA)
Depart: 10/23/2026

One-way

Choice

From
$284
Seen: 18 hrs ago

Detroit (DTW)to

Seattle/Tacoma (SEA)
Depart: 09/17/2026

One-way

Choice

From
$284
Seen: 16 hrs ago

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Explore flights from Detroit to Seattle/Tacoma

Aug 2026
From$265*
Seen: 22 hrs ago
One Way/Basic
Sep 2026
From$234*
Seen: 16 hrs ago
One Way/Basic
Oct 2026
From$234*
Seen: 18 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $265
Displaying fares for August-2026
  • DTW–SEA: cmp-view-offers-disclaimer. Find Offers
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  • DTW–SEA, 08/04/2026: From $419
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  • DTW–SEA, 08/09/2026: From $359
    09

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

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  • DTW–SEA, 08/11/2026: From $344
    11

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  • DTW–SEA, 08/12/2026: From $344
    12

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    13

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    14

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  • DTW–SEA, 08/15/2026: From $294
    15

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    16

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    17

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    18

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  • DTW–SEA, 08/19/2026: From $294
    19

    Wed

  • DTW–SEA, 08/20/2026: From $294
    20

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    21

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  • DTW–SEA, 08/22/2026: From $265
    22

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    23

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    24

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    25

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    26

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    27

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    28

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    29

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    30

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    31

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    01

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    SEP

    • Range$265-$419

    *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:
    Wayne County Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Distance:
    1927 miles

    Route Information

    66† Weekly flights

    † 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

    There are 66 weekly flights from Detroit to Seattle/Tacoma on Southwest Airlines.
    To find the lowest fares by day and time to fly Detroit 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 Detroit 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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