Southwest® flights from Denver to Seattle/Tacoma from $154

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Low fares from Denver to Seattle/Tacoma

$

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 12/09/2026

One-way

Basic

From
$154
Seen: 21 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 10/24/2026

One-way

Basic

From
$154
Seen: 22 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 11/24/2026

One-way

Basic

From
$154
Seen: 9 hrs ago

Denver (DEN)to

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

One-way

Basic

From
$154
Seen: 5 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 12/19/2026

One-way

Basic

From
$154
Seen: 9 hrs ago

Denver (DEN)to

Seattle/Tacoma (SEA)
Depart: 12/08/2026

One-way

Basic

From
$154
Seen: 11 hrs ago

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Explore flights from Denver to Seattle/Tacoma

Oct 2026
From$154*
Seen: 22 hrs ago
One Way/Basic
Nov 2026
From$154*
Seen: 2 hrs ago
One Way/Basic
Dec 2026
From$154*
Seen: 11 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $154
cmp-daily-histogram-bars-legend-max-price-aria-label $420
Displaying fares for October-2026
  • DEN–SEA: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

    OCT

  • DEN–SEA, 10/03/2026: From $315
    03

    Sat

  • DEN–SEA, 10/04/2026: From $315
    04

    Sun

  • DEN–SEA, 10/05/2026: From $320
    05

    Mon

  • DEN–SEA, 10/06/2026: From $315
    06

    Tue

  • DEN–SEA, 10/07/2026: From $315
    07

    Wed

  • DEN–SEA, 10/08/2026: From $260
    08

    Thu

  • DEN–SEA, 10/09/2026: From $265
    09

    Fri

  • DEN–SEA, 10/10/2026: From $255
    10

    Sat

  • DEN–SEA, 10/11/2026: From $255
    11

    Sun

  • DEN–SEA, 10/12/2026: From $260
    12

    Mon

  • DEN–SEA, 10/13/2026: From $255
    13

    Tue

  • DEN–SEA, 10/14/2026: From $255
    14

    Wed

  • DEN–SEA, 10/15/2026: From $255
    15

    Thu

  • DEN–SEA, 10/16/2026: From $205
    16

    Fri

  • DEN–SEA, 10/17/2026: From $205
    17

    Sat

  • DEN–SEA, 10/18/2026: From $420
    18

    Sun

  • DEN–SEA, 10/19/2026: From $205
    19

    Mon

  • DEN–SEA, 10/20/2026: From $205
    20

    Tue

  • DEN–SEA: cmp-view-offers-disclaimer. Find Offers
    21

    Wed

  • DEN–SEA, 10/22/2026: From $180
    22

    Thu

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

    Fri

  • DEN–SEA, 10/24/2026: From $154
    24

    Sat

  • DEN–SEA, 10/25/2026: From $180
    25

    Sun

  • DEN–SEA, 10/26/2026: From $185
    26

    Mon

  • DEN–SEA, 10/27/2026: From $154
    27

    Tue

  • DEN–SEA: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

  • DEN–SEA, 10/29/2026: From $180
    29

    Thu

  • DEN–SEA, 10/30/2026: From $180
    30

    Fri

  • DEN–SEA, 10/31/2026: From $154
    31

    Sat

  • DEN–SEA, 11/01/2026: From $190
    01

    Sun

    NOV

    • Range$154-$420

    *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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