Southwest® flights from Baltimore/Washington to San Antonio from $159

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Low fares from Baltimore/Washington to San Antonio

$

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 11/18/2026

One-way

Basic

From
$159
Seen: 10 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/02/2026

One-way

Basic

From
$159
Seen: 7 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$159
Seen: 8 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 11/05/2026

One-way

Basic

From
$159
Seen: 2 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 10/01/2026

One-way

Basic

From
$159
Seen: 9 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/17/2026

One-way

Basic

From
$159
Seen: 19 hrs ago

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Explore flights from Baltimore/Washington to San Antonio

Sep 2026
From$325*
Seen: 4 hrs ago
One Way/Basic
Oct 2026
From$159*
Seen: 9 hrs ago
One Way/Basic
Nov 2026
From$159*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $159
cmp-daily-histogram-bars-legend-max-price-aria-label $581
Displaying fares for September-2026
  • BWI–SAT, 09/11/2026: From $571
    11

    Fri

    SEP

  • BWI–SAT, 09/12/2026: From $581
    12

    Sat

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

    Sun

  • BWI–SAT, 09/14/2026: From $571
    14

    Mon

  • BWI–SAT, 09/15/2026: From $571
    15

    Tue

  • BWI–SAT, 09/16/2026: From $571
    16

    Wed

  • BWI–SAT, 09/17/2026: From $516
    17

    Thu

  • BWI–SAT, 09/18/2026: From $516
    18

    Fri

  • BWI–SAT, 09/19/2026: From $526
    19

    Sat

  • BWI–SAT, 09/20/2026: From $516
    20

    Sun

  • BWI–SAT, 09/21/2026: From $516
    21

    Mon

  • BWI–SAT, 09/22/2026: From $526
    22

    Tue

  • BWI–SAT, 09/23/2026: From $516
    23

    Wed

  • BWI–SAT, 09/24/2026: From $526
    24

    Thu

  • BWI–SAT, 09/25/2026: From $325
    25

    Fri

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

    Sat

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

    Sun

  • BWI–SAT, 09/28/2026: From $335
    28

    Mon

  • BWI–SAT, 09/29/2026: From $325
    29

    Tue

  • BWI–SAT, 09/30/2026: From $335
    30

    Wed

  • BWI–SAT, 10/01/2026: From $159
    01

    Thu

    OCT

  • BWI–SAT, 10/02/2026: From $179
    02

    Fri

  • BWI–SAT, 10/03/2026: From $169
    03

    Sat

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

    Sun

  • BWI–SAT, 10/05/2026: From $159
    05

    Mon

  • BWI–SAT, 10/06/2026: From $169
    06

    Tue

  • BWI–SAT, 10/07/2026: From $159
    07

    Wed

  • BWI–SAT, 10/08/2026: From $267
    08

    Thu

  • BWI–SAT, 10/09/2026: From $179
    09

    Fri

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

    Sat

    • Range$159-$581

    *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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