Southwest® flights from Seattle/Tacoma to San Antonio from $158

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Low fares from Seattle/Tacoma to San Antonio

$

Seattle/Tacoma (SEA)to

San Antonio (SAT)
Depart: 01/07/2027

One-way

Basic

From
$153
Seen: 11 hrs ago

Seattle/Tacoma (SEA)to

San Antonio (SAT)
Depart: 12/16/2026

One-way

Basic

From
$158
Seen: 18 hrs ago

Seattle/Tacoma (SEA)to

San Antonio (SAT)
Depart: 12/07/2026

One-way

Basic

From
$158
Seen: 16 hrs ago

Seattle/Tacoma (SEA)to

San Antonio (SAT)
Depart: 10/24/2026

One-way

Basic

From
$158
Seen: 23 hrs ago

Seattle/Tacoma (SEA)to

San Antonio (SAT)
Depart: 12/09/2026

One-way

Basic

From
$158
Seen: 8 hrs ago

Seattle/Tacoma (SEA)to

San Antonio (SAT)
Depart: 11/19/2026

One-way

Basic

From
$158
Seen: 7 hrs ago

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Explore flights from Seattle/Tacoma to San Antonio

Oct 2026
From$158*
Seen: 23 hrs ago
One Way/Basic
Nov 2026
From$158*
Seen: 7 hrs ago
One Way/Basic
Dec 2026
From$158*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $158
cmp-daily-histogram-bars-legend-max-price-aria-label $317
Displaying fares for October-2026
  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

    OCT

  • SEA–SAT, 10/03/2026: From $271
    03

    Sat

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • SEA–SAT, 10/05/2026: From $317
    05

    Mon

  • SEA–SAT, 10/06/2026: From $271
    06

    Tue

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

    Wed

  • SEA–SAT, 10/08/2026: From $234
    08

    Thu

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    09

    Fri

  • SEA–SAT, 10/10/2026: From $234
    10

    Sat

  • SEA–SAT, 10/11/2026: From $239
    11

    Sun

  • SEA–SAT, 10/12/2026: From $295
    12

    Mon

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    13

    Tue

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

    Wed

  • SEA–SAT, 10/15/2026: From $239
    15

    Thu

  • SEA–SAT, 10/16/2026: From $234
    16

    Fri

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    17

    Sat

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    18

    Sun

  • SEA–SAT, 10/19/2026: From $194
    19

    Mon

  • SEA–SAT, 10/20/2026: From $194
    20

    Tue

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

    Wed

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

    Thu

  • SEA–SAT, 10/23/2026: From $194
    23

    Fri

  • SEA–SAT, 10/24/2026: From $158
    24

    Sat

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

    Sun

  • SEA–SAT, 10/26/2026: From $158
    26

    Mon

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

    Tue

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

    Wed

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    29

    Thu

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    30

    Fri

  • SEA–SAT: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

  • SEA–SAT, 11/01/2026: From $199
    01

    Sun

    NOV

    • Range$158-$317

    *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:
    San Antonio International Airport
    Distance:
    1774 miles

    Route Information

    119† 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 119 weekly flights from Seattle/Tacoma to San Antonio on Southwest Airlines.
    To find the lowest fares by day and time to fly Seattle/Tacoma to San Antonio with Southwest, check out our Low Fare Calendar.
    You can rent a car at San Antonio International Airport book yours with your flight.
    Yes! Flights from Seattle/Tacoma to San Antonio—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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