Southwest® flights from Baltimore/Washington to San Antonio from $149

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Low fares from Baltimore/Washington to San Antonio

$

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 09/01/2026

One-way

Basic

From
$149
Seen: 21 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 10/15/2026

One-way

Basic

From
$149
Seen: 17 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 10/05/2026

One-way

Basic

From
$149
Seen: 16 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 09/24/2026

One-way

Basic

From
$149
Seen: 8 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 09/26/2026

One-way

Basic

From
$159
Seen: 19 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 10/30/2026

One-way

Basic

From
$169
Seen: 11 hrs ago

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Explore flights from Baltimore/Washington to San Antonio

Aug 2026
From$185*
Seen: 5 hrs ago
One Way/Basic
Sep 2026
From$149*
Seen: 8 hrs ago
One Way/Basic
Oct 2026
From$149*
Seen: 17 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $185
cmp-daily-histogram-bars-legend-max-price-aria-label $571
Displaying fares for August-2026
  • BWI–SAT, 08/01/2026: From $515
    01

    Sat

    AUG

  • BWI–SAT, 08/02/2026: From $571
    02

    Sun

  • BWI–SAT, 08/03/2026: From $460
    03

    Mon

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

    Tue

  • BWI–SAT, 08/05/2026: From $460
    05

    Wed

  • BWI–SAT, 08/06/2026: From $460
    06

    Thu

  • BWI–SAT, 08/07/2026: From $460
    07

    Fri

  • BWI–SAT, 08/08/2026: From $460
    08

    Sat

  • BWI–SAT, 08/09/2026: From $460
    09

    Sun

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

    Mon

  • BWI–SAT, 08/11/2026: From $460
    11

    Tue

  • BWI–SAT, 08/12/2026: From $460
    12

    Wed

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

    Thu

  • BWI–SAT, 08/14/2026: From $325
    14

    Fri

  • BWI–SAT, 08/15/2026: From $325
    15

    Sat

  • BWI–SAT, 08/16/2026: From $325
    16

    Sun

  • BWI–SAT, 08/17/2026: From $325
    17

    Mon

  • BWI–SAT, 08/18/2026: From $325
    18

    Tue

  • BWI–SAT, 08/19/2026: From $325
    19

    Wed

  • BWI–SAT, 08/20/2026: From $325
    20

    Thu

  • BWI–SAT, 08/21/2026: From $215
    21

    Fri

  • BWI–SAT, 08/22/2026: From $185
    22

    Sat

  • BWI–SAT, 08/23/2026: From $293
    23

    Sun

  • BWI–SAT, 08/24/2026: From $185
    24

    Mon

  • BWI–SAT, 08/25/2026: From $185
    25

    Tue

  • BWI–SAT, 08/26/2026: From $185
    26

    Wed

  • BWI–SAT, 08/27/2026: From $185
    27

    Thu

  • BWI–SAT, 08/28/2026: From $215
    28

    Fri

  • BWI–SAT, 08/29/2026: From $185
    29

    Sat

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

    Sun

  • BWI–SAT, 08/31/2026: From $185
    31

    Mon

    • Range$185-$571

    *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:
    Balt./Wash. International Airport
    Arriving at:
    San Antonio International Airport
    Average flight time:
    3 hours 41 minutes
    Distance:
    1407 miles

    Route Information

    156† Weekly flights
    • 2‡ Nonstop flights per day Monday through Friday
    • 2‡ Nonstop flights on Saturday
    • 2‡ 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 Baltimore/Washington to San Antonio is 3 hours 41 minutes.
    There are 156 weekly flights from Baltimore/Washington to San Antonio on Southwest Airlines.
    Yes, Southwest flies nonstop from Baltimore/Washington to San Antonio 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Baltimore/Washington to San Antonio 2 times per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Baltimore/Washington 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 Baltimore/Washington 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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