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

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Low fares from Seattle/Tacoma to Denver

$

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 11/21/2026

One-way

Basic

From
$154
Seen: 22 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 11/04/2026

One-way

Basic

From
$154
Seen: 17 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 10/31/2026

One-way

Basic

From
$154
Seen: 16 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 11/25/2026

One-way

Basic

From
$154
Seen: 14 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 12/22/2026

One-way

Basic

From
$154
Seen: 14 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 11/10/2026

One-way

Basic

From
$154
Seen: 6 hrs ago

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Explore flights from Seattle/Tacoma to Denver

Oct 2026
From$154*
Seen: 14 minutes ago
One Way/Basic
Nov 2026
From$154*
Seen: 10 hrs ago
One Way/Basic
Dec 2026
From$154*
Seen: 3 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
  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

    OCT

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

    Sat

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

    Sun

  • SEA–DEN, 10/05/2026: From $315
    05

    Mon

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

    Tue

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • SEA–DEN, 10/08/2026: From $255
    08

    Thu

  • SEA–DEN, 10/09/2026: From $255
    09

    Fri

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

    Sat

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    11

    Sun

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    12

    Mon

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

    Tue

  • SEA–DEN, 10/14/2026: From $420
    14

    Wed

  • SEA–DEN, 10/15/2026: From $265
    15

    Thu

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

    Fri

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

    Sat

  • SEA–DEN, 10/18/2026: From $205
    18

    Sun

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

    Mon

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    20

    Tue

  • SEA–DEN, 10/21/2026: From $167
    21

    Wed

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

    Thu

  • SEA–DEN, 10/23/2026: From $180
    23

    Fri

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    24

    Sat

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

    Sun

  • SEA–DEN, 10/26/2026: From $180
    26

    Mon

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

    Tue

  • SEA–DEN, 10/28/2026: From $154
    28

    Wed

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

    Thu

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

    Fri

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

    Sat

  • SEA–DEN, 11/01/2026: From $180
    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:
    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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