Southwest® flights from Seattle/Tacoma to Austin from $149

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Low fares from Seattle/Tacoma to Austin

$

Seattle/Tacoma (SEA)to

Austin (AUS)
Depart: 09/26/2026

One-way

Basic

From
$149
Seen: 18 hrs ago

Seattle/Tacoma (SEA)to

Austin (AUS)
Depart: 11/10/2026

One-way

Basic

From
$149
Seen: 14 hrs ago

Seattle/Tacoma (SEA)to

Austin (AUS)
Depart: 11/19/2026

One-way

Basic

From
$149
Seen: 14 hrs ago

Seattle/Tacoma (SEA)to

Austin (AUS)
Depart: 10/14/2026

One-way

Basic

From
$149
Seen: 4 hrs ago

Seattle/Tacoma (SEA)to

Austin (AUS)
Depart: 11/18/2026

One-way

Basic

From
$149
Seen: 2 hrs ago

Seattle/Tacoma (SEA)to

Austin (AUS)
Depart: 11/23/2026

One-way

Basic

From
$149
Seen: 4 hrs ago

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Explore flights from Seattle/Tacoma to Austin

Aug 2026
From$354*
Seen: 8 hrs ago
One Way/Basic
Sep 2026
From$149*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$149*
Seen: 7 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $149
cmp-daily-histogram-bars-legend-max-price-aria-label $444
Displaying fares for August-2026
  • SEA–AUS: cmp-view-offers-disclaimer. Find Offers
    21

    Fri

    AUG

  • SEA–AUS, 08/22/2026: From $434
    22

    Sat

  • SEA–AUS, 08/23/2026: From $444
    23

    Sun

  • SEA–AUS, 08/24/2026: From $434
    24

    Mon

  • SEA–AUS, 08/25/2026: From $434
    25

    Tue

  • SEA–AUS, 08/26/2026: From $434
    26

    Wed

  • SEA–AUS, 08/27/2026: From $354
    27

    Thu

  • SEA–AUS, 08/28/2026: From $354
    28

    Fri

  • SEA–AUS, 08/29/2026: From $354
    29

    Sat

  • SEA–AUS, 08/30/2026: From $354
    30

    Sun

  • SEA–AUS, 08/31/2026: From $354
    31

    Mon

  • SEA–AUS, 09/01/2026: From $354
    01

    Tue

    SEP

  • SEA–AUS: cmp-view-offers-disclaimer. Find Offers
    02

    Wed

  • SEA–AUS, 09/03/2026: From $229
    03

    Thu

  • SEA–AUS, 09/04/2026: From $239
    04

    Fri

  • SEA–AUS: cmp-view-offers-disclaimer. Find Offers
    05

    Sat

  • SEA–AUS: cmp-view-offers-disclaimer. Find Offers
    06

    Sun

  • SEA–AUS, 09/07/2026: From $444
    07

    Mon

  • SEA–AUS, 09/08/2026: From $259
    08

    Tue

  • SEA–AUS, 09/09/2026: From $229
    09

    Wed

  • SEA–AUS: cmp-view-offers-disclaimer. Find Offers
    10

    Thu

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

    Fri

  • SEA–AUS, 09/12/2026: From $149
    12

    Sat

  • SEA–AUS, 09/13/2026: From $249
    13

    Sun

  • SEA–AUS, 09/14/2026: From $209
    14

    Mon

  • SEA–AUS, 09/15/2026: From $149
    15

    Tue

  • SEA–AUS, 09/16/2026: From $149
    16

    Wed

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

    Thu

  • SEA–AUS, 09/18/2026: From $164
    18

    Fri

  • SEA–AUS, 09/19/2026: From $149
    19

    Sat

  • SEA–AUS, 09/20/2026: From $249
    20

    Sun

    • Range$149-$444

    *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:
    Austin-Bergstrom International Airport
    Distance:
    1770 miles

    Route Information

    145† Weekly flights

    † 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

    There are 145 weekly flights from Seattle/Tacoma to Austin on Southwest Airlines.
    To find the lowest fares by day and time to fly Seattle/Tacoma to Austin with Southwest, check out our Low Fare Calendar.
    You can rent a car at Austin-Bergstrom International Airport book yours with your flight.
    Yes! Flights from Seattle/Tacoma to Austin—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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