Southwest® flights from Seattle/Tacoma to Denver from $99

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Low fares from Seattle/Tacoma to Denver

$

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 08/26/2026

One-way

Basic

From
$99
Seen: 21 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 08/28/2026

One-way

Basic

From
$99
Seen: 15 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 08/21/2026

One-way

Basic

From
$99
Seen: 1 hour ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 08/27/2026

One-way

Basic

From
$99
Seen: 2 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 08/24/2026

One-way

Basic

From
$104
Seen: 5 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 08/29/2026

One-way

Basic

From
$104
Seen: 3 hrs ago

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Explore flights from Seattle/Tacoma to Denver

Aug 2026
From$99*
Seen: 1 hour ago
One Way/Basic
Sep 2026
From$129*
Seen: 20 hrs ago
One Way/Basic
Oct 2026
From$134*
Seen: 43 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $99
cmp-daily-histogram-bars-legend-max-price-aria-label $329
Displaying fares for August-2026
  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    01

    Sat

    AUG

  • SEA–DEN, 08/02/2026: From $295
    02

    Sun

  • SEA–DEN, 08/03/2026: From $295
    03

    Mon

  • SEA–DEN, 08/04/2026: From $329
    04

    Tue

  • SEA–DEN, 08/05/2026: From $295
    05

    Wed

  • SEA–DEN, 08/06/2026: From $329
    06

    Thu

  • SEA–DEN, 08/07/2026: From $235
    07

    Fri

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

    Sat

  • SEA–DEN, 08/09/2026: From $269
    09

    Sun

  • SEA–DEN, 08/10/2026: From $235
    10

    Mon

  • SEA–DEN, 08/11/2026: From $245
    11

    Tue

  • SEA–DEN, 08/12/2026: From $235
    12

    Wed

  • SEA–DEN, 08/13/2026: From $235
    13

    Thu

  • SEA–DEN, 08/14/2026: From $149
    14

    Fri

  • SEA–DEN, 08/15/2026: From $185
    15

    Sat

  • SEA–DEN, 08/16/2026: From $219
    16

    Sun

  • SEA–DEN, 08/17/2026: From $185
    17

    Mon

  • SEA–DEN, 08/18/2026: From $149
    18

    Tue

  • SEA–DEN, 08/19/2026: From $149
    19

    Wed

  • SEA–DEN, 08/20/2026: From $149
    20

    Thu

  • SEA–DEN, 08/21/2026: From $99
    21

    Fri

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    22

    Sat

  • SEA–DEN, 08/23/2026: From $179
    23

    Sun

  • SEA–DEN, 08/24/2026: From $104
    24

    Mon

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    25

    Tue

  • SEA–DEN, 08/26/2026: From $99
    26

    Wed

  • SEA–DEN, 08/27/2026: From $99
    27

    Thu

  • SEA–DEN, 08/28/2026: From $99
    28

    Fri

  • SEA–DEN, 08/29/2026: From $104
    29

    Sat

  • SEA–DEN, 08/30/2026: From $144
    30

    Sun

  • SEA–DEN, 08/31/2026: From $159
    31

    Mon

    • Range$99-$329

    *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:
    Seattle/Tacoma International Airport
    Arriving at:
    Denver International Airport
    Average flight time:
    2 hours 38 minutes
    Distance:
    1024 miles

    Route Information

    158† Weekly flights
    • 4‡ Nonstop flights per day Monday through Friday
    • 3‡ Nonstop flights on Saturday
    • 4‡ 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 Seattle/Tacoma to Denver is 2 hours 38 minutes.
    There are 158 weekly flights from Seattle/Tacoma to Denver on Southwest Airlines.
    Yes, Southwest flies nonstop from Seattle/Tacoma to Denver 4 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Seattle/Tacoma to Denver 3 times per day on Saturdays and 4 times per day on Sundays.
    To find the lowest fares by day and time to fly Seattle/Tacoma to Denver with Southwest, check out our Low Fare Calendar.
    You can rent a car at Denver International Airport book yours with your flight.
    Yes! Flights from Seattle/Tacoma to Denver—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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