Southwest® flights from Baltimore/Washington to San Antonio from $139

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Low fares from Baltimore/Washington to San Antonio

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Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/05/2026

One-way

Basic

From
$139
Seen: 16 hrs ago

Baltimore/Washington (BWI)to

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

One-way

Basic

From
$139
Seen: 12 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/21/2026

One-way

Basic

From
$139
Seen: 10 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/10/2026

One-way

Basic

From
$139
Seen: 12 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 11/04/2026

One-way

Basic

From
$139
Seen: 13 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 10/28/2026

One-way

Basic

From
$139
Seen: 9 hrs ago

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Explore flights from Baltimore/Washington to San Antonio

Oct 2026
From$139*
Seen: 9 hrs ago
One Way/Basic
Nov 2026
From$139*
Seen: 22 hrs ago
One Way/Basic
Dec 2026
From$139*
Seen: 12 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $139
cmp-daily-histogram-bars-legend-max-price-aria-label $581
Displaying fares for October-2026
  • BWI–SAT, 10/02/2026: From $581
    02

    Fri

    OCT

  • BWI–SAT, 10/03/2026: From $581
    03

    Sat

  • BWI–SAT, 10/04/2026: From $581
    04

    Sun

  • BWI–SAT, 10/05/2026: From $581
    05

    Mon

  • BWI–SAT, 10/06/2026: From $581
    06

    Tue

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

    Wed

  • BWI–SAT, 10/08/2026: From $526
    08

    Thu

  • BWI–SAT, 10/09/2026: From $526
    09

    Fri

  • BWI–SAT, 10/10/2026: From $526
    10

    Sat

  • BWI–SAT, 10/11/2026: From $526
    11

    Sun

  • BWI–SAT, 10/12/2026: From $526
    12

    Mon

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

    Tue

  • BWI–SAT, 10/14/2026: From $335
    14

    Wed

  • BWI–SAT, 10/15/2026: From $335
    15

    Thu

  • BWI–SAT, 10/16/2026: From $335
    16

    Fri

  • BWI–SAT, 10/17/2026: From $335
    17

    Sat

  • BWI–SAT, 10/18/2026: From $335
    18

    Sun

  • BWI–SAT, 10/19/2026: From $335
    19

    Mon

  • BWI–SAT, 10/20/2026: From $335
    20

    Tue

  • BWI–SAT, 10/21/2026: From $149
    21

    Wed

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

    Thu

  • BWI–SAT, 10/23/2026: From $189
    23

    Fri

  • BWI–SAT, 10/24/2026: From $149
    24

    Sat

  • BWI–SAT, 10/25/2026: From $303
    25

    Sun

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

    Mon

  • BWI–SAT, 10/27/2026: From $149
    27

    Tue

  • BWI–SAT, 10/28/2026: From $139
    28

    Wed

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

    Thu

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

    Fri

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

    Sat

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

    Sun

    NOV

    • Range$139-$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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