Southwest® flights from Denver to Seattle/Tacoma from $134

Promo Code

Low fares from Denver to Seattle/Tacoma

$

Denver (DEN)to

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

One-way

Basic

From
$134
Seen: 23 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 11/17/2026

One-way

Basic

From
$134
Seen: 14 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 09/22/2026

One-way

Basic

From
$134
Seen: 10 hrs ago

Denver (DEN)to

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

One-way

Basic

From
$134
Seen: 13 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 10/14/2026

One-way

Basic

From
$134
Seen: 4 hrs ago

Denver (DEN)to

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

One-way

Basic

From
$134
Seen: 1 hour ago

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Explore flights from Denver to Seattle/Tacoma

Aug 2026
From$235*
Seen: 11 hrs ago
One Way/Basic
Sep 2026
From$134*
Seen: 21 hrs ago
One Way/Basic
Oct 2026
From$134*
Seen: 17 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $134
cmp-daily-histogram-bars-legend-max-price-aria-label $295
Displaying fares for August-2026
  • DEN–SEA, 08/23/2026: From $295
    23

    Sun

    AUG

  • DEN–SEA, 08/24/2026: From $295
    24

    Mon

  • DEN–SEA, 08/25/2026: From $295
    25

    Tue

  • DEN–SEA, 08/26/2026: From $295
    26

    Wed

  • DEN–SEA, 08/27/2026: From $295
    27

    Thu

  • DEN–SEA, 08/28/2026: From $295
    28

    Fri

  • DEN–SEA, 08/29/2026: From $235
    29

    Sat

  • DEN–SEA, 08/30/2026: From $235
    30

    Sun

  • DEN–SEA, 08/31/2026: From $235
    31

    Mon

  • DEN–SEA, 09/01/2026: From $235
    01

    Tue

    SEP

  • DEN–SEA, 09/02/2026: From $235
    02

    Wed

  • DEN–SEA, 09/03/2026: From $235
    03

    Thu

  • DEN–SEA, 09/04/2026: From $235
    04

    Fri

  • DEN–SEA, 09/05/2026: From $185
    05

    Sat

  • DEN–SEA, 09/06/2026: From $185
    06

    Sun

  • DEN–SEA, 09/07/2026: From $195
    07

    Mon

  • DEN–SEA, 09/08/2026: From $185
    08

    Tue

  • DEN–SEA, 09/09/2026: From $185
    09

    Wed

  • DEN–SEA, 09/10/2026: From $185
    10

    Thu

  • DEN–SEA, 09/11/2026: From $185
    11

    Fri

  • DEN–SEA, 09/12/2026: From $134
    12

    Sat

  • DEN–SEA, 09/13/2026: From $160
    13

    Sun

  • DEN–SEA, 09/14/2026: From $149
    14

    Mon

  • DEN–SEA, 09/15/2026: From $134
    15

    Tue

  • DEN–SEA, 09/16/2026: From $134
    16

    Wed

  • DEN–SEA, 09/17/2026: From $149
    17

    Thu

  • DEN–SEA, 09/18/2026: From $160
    18

    Fri

  • DEN–SEA, 09/19/2026: From $134
    19

    Sat

  • DEN–SEA, 09/20/2026: From $160
    20

    Sun

  • DEN–SEA, 09/21/2026: From $149
    21

    Mon

  • DEN–SEA, 09/22/2026: From $134
    22

    Tue

    • Range$134-$295

    *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:
    Denver International Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Average flight time:
    2 hours 58 minutes
    Distance:
    1024 miles

    Route Information

    155† Weekly flights
    • 4‡ Nonstop flights per day Monday through Friday
    • 3‡ Nonstop flights on Saturday
    • 3‡ Nonstop flights on Sunday

    † 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 Denver to Seattle/Tacoma is 2 hours 58 minutes.
    There are 155 weekly flights from Denver to Seattle/Tacoma on Southwest Airlines.
    Yes, Southwest flies nonstop from Denver to Seattle/Tacoma 4 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Denver to Seattle/Tacoma 3 times per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Denver 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 Denver 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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