Southwest® flights from Seattle/Tacoma to Denver from $79

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Low fares from Seattle/Tacoma to Denver

$

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 10/21/2026

One-way

Basic

From
$79
Seen: 9 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 12/12/2026

One-way

Basic

From
$79
Seen: 8 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 10/20/2026

One-way

Basic

From
$79
Seen: 10 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 11/05/2026

One-way

Basic

From
$79
Seen: 12 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 12/03/2026

One-way

Basic

From
$79
Seen: 18 hrs ago

Seattle/Tacoma (SEA)to

Denver (DEN)
Depart: 11/14/2026

One-way

Basic

From
$79
Seen: 20 hrs ago

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Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

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Explore flights from Seattle/Tacoma to Denver

Sep 2026
From$205*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$79*
Seen: 10 hrs ago
One Way/Basic
Nov 2026
From$79*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $149
cmp-daily-histogram-bars-legend-max-price-aria-label $315
Displaying fares for September-2026
  • SEA–DEN, 09/11/2026: From $315
    11

    Fri

    SEP

  • SEA–DEN, 09/12/2026: From $315
    12

    Sat

  • SEA–DEN, 09/13/2026: From $315
    13

    Sun

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    14

    Mon

  • SEA–DEN, 09/15/2026: From $305
    15

    Tue

  • SEA–DEN, 09/16/2026: From $305
    16

    Wed

  • SEA–DEN, 09/17/2026: From $315
    17

    Thu

  • SEA–DEN, 09/18/2026: From $245
    18

    Fri

  • SEA–DEN, 09/19/2026: From $255
    19

    Sat

  • SEA–DEN, 09/20/2026: From $255
    20

    Sun

  • SEA–DEN, 09/21/2026: From $255
    21

    Mon

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

    Tue

  • SEA–DEN, 09/23/2026: From $255
    23

    Wed

  • SEA–DEN, 09/24/2026: From $255
    24

    Thu

  • SEA–DEN, 09/25/2026: From $205
    25

    Fri

  • SEA–DEN, 09/26/2026: From $205
    26

    Sat

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    27

    Sun

  • SEA–DEN, 09/28/2026: From $205
    28

    Mon

  • SEA–DEN, 09/29/2026: From $205
    29

    Tue

  • SEA–DEN, 09/30/2026: From $205
    30

    Wed

  • SEA–DEN: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

  • SEA–DEN, 10/02/2026: From $162
    02

    Fri

  • SEA–DEN, 10/03/2026: From $149
    03

    Sat

  • SEA–DEN, 10/04/2026: From $170
    04

    Sun

  • SEA–DEN, 10/05/2026: From $159
    05

    Mon

  • SEA–DEN, 10/06/2026: From $149
    06

    Tue

  • SEA–DEN, 10/07/2026: From $149
    07

    Wed

  • SEA–DEN, 10/08/2026: From $162
    08

    Thu

  • SEA–DEN, 10/09/2026: From $172
    09

    Fri

  • SEA–DEN, 10/10/2026: From $149
    10

    Sat

    • Range$149-$315

    *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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