Southwest® flights from Philadelphia to San Antonio from $134

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Low fares from Philadelphia to San Antonio

$

Philadelphia (PHL)to

San Antonio (SAT)
Depart: 11/01/2026

One-way

Basic

From
$134
Seen: 14 hrs ago

Philadelphia (PHL)to

San Antonio (SAT)
Depart: 10/21/2026

One-way

Basic

From
$134
Seen: 11 hrs ago

Philadelphia (PHL)to

San Antonio (SAT)
Depart: 10/03/2026

One-way

Basic

From
$134
Seen: 6 hrs ago

Philadelphia (PHL)to

San Antonio (SAT)
Depart: 11/03/2026

One-way

Basic

From
$134
Seen: 1 hour ago

Philadelphia (PHL)to

San Antonio (SAT)
Depart: 10/31/2026

One-way

Basic

From
$134
Seen: 21 hrs ago

Philadelphia (PHL)to

San Antonio (SAT)
Depart: 11/02/2026

One-way

Basic

From
$134
Seen: 18 hrs ago

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Explore flights from Philadelphia to San Antonio

Sep 2026
From$318*
Seen: 20 hrs ago
One Way/Basic
Oct 2026
From$134*
Seen: 15 hrs ago
One Way/Basic
Nov 2026
From$134*
Seen: 4 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $134
cmp-daily-histogram-bars-legend-max-price-aria-label $375
Displaying fares for September-2026
  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

    SEP

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    12

    Sat

  • PHL–SAT, 09/13/2026: From $375
    13

    Sun

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

    Mon

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • PHL–SAT, 09/16/2026: From $318
    16

    Wed

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

    Thu

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

    Fri

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • PHL–SAT, 09/21/2026: From $375
    21

    Mon

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

    Tue

  • PHL–SAT, 09/23/2026: From $318
    23

    Wed

  • PHL–SAT, 09/24/2026: From $336
    24

    Thu

  • PHL–SAT, 09/25/2026: From $336
    25

    Fri

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    26

    Sat

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

    Sun

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

    Mon

  • PHL–SAT, 09/29/2026: From $318
    29

    Tue

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

    Wed

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

  • PHL–SAT, 10/03/2026: From $134
    03

    Sat

  • PHL–SAT, 10/04/2026: From $134
    04

    Sun

  • PHL–SAT, 10/05/2026: From $134
    05

    Mon

  • PHL–SAT, 10/06/2026: From $134
    06

    Tue

  • PHL–SAT, 10/07/2026: From $134
    07

    Wed

  • PHL–SAT, 10/08/2026: From $242
    08

    Thu

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

    Fri

  • PHL–SAT: cmp-view-offers-disclaimer. Find Offers
    10

    Sat

    • Range$134-$375

    *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:
    Philadelphia International Airport
    Arriving at:
    San Antonio International Airport
    Distance:
    1496 miles

    Route Information

    124† 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 124 weekly flights from Philadelphia to San Antonio on Southwest Airlines.
    To find the lowest fares by day and time to fly Philadelphia 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 Philadelphia 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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