Southwest® flights from Baltimore/Washington to San Antonio from $135

Promo Code

Low fares from Baltimore/Washington to San Antonio

$

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 01/12/2027

One-way

Basic

From
$135
Seen: 11 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 02/20/2027

One-way

Basic

From
$135
Seen: 18 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/19/2026

One-way

Basic

From
$135
Seen: 8 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 02/02/2027

One-way

Basic

From
$135
Seen: 22 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 12/15/2026

One-way

Basic

From
$135
Seen: 3 hrs ago

Baltimore/Washington (BWI)to

San Antonio (SAT)
Depart: 01/13/2027

One-way

Basic

From
$135
Seen: 5 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Baltimore/Washington to San Antonio

Nov 2026
From$350*
Seen: 14 hrs ago
One Way/Basic
Dec 2026
From$135*
Seen: 3 hrs ago
One Way/Basic
Jan 2027
From$135*
Seen: 21 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $145
cmp-daily-histogram-bars-legend-max-price-aria-label $596
Displaying fares for November-2026
  • BWI–SAT, 11/12/2026: From $596
    12

    Thu

    NOV

  • BWI–SAT, 11/13/2026: From $596
    13

    Fri

  • BWI–SAT, 11/14/2026: From $596
    14

    Sat

  • BWI–SAT, 11/15/2026: From $596
    15

    Sun

  • BWI–SAT: cmp-view-offers-disclaimer. Find Offers
    16

    Mon

  • BWI–SAT, 11/17/2026: From $596
    17

    Tue

  • BWI–SAT, 11/18/2026: From $541
    18

    Wed

  • BWI–SAT, 11/19/2026: From $541
    19

    Thu

  • BWI–SAT, 11/20/2026: From $536
    20

    Fri

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

    Sat

  • BWI–SAT, 11/22/2026: From $536
    22

    Sun

  • BWI–SAT, 11/23/2026: From $536
    23

    Mon

  • BWI–SAT, 11/24/2026: From $536
    24

    Tue

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

    Wed

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

    Thu

  • BWI–SAT, 11/27/2026: From $350
    27

    Fri

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

    Sat

  • BWI–SAT, 11/29/2026: From $398
    29

    Sun

  • BWI–SAT, 11/30/2026: From $375
    30

    Mon

  • BWI–SAT, 12/01/2026: From $350
    01

    Tue

    DEC

  • BWI–SAT, 12/02/2026: From $145
    02

    Wed

  • BWI–SAT, 12/03/2026: From $165
    03

    Thu

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

    Fri

  • BWI–SAT, 12/05/2026: From $318
    05

    Sat

  • BWI–SAT, 12/06/2026: From $313
    06

    Sun

  • BWI–SAT, 12/07/2026: From $165
    07

    Mon

  • BWI–SAT, 12/08/2026: From $318
    08

    Tue

  • BWI–SAT, 12/09/2026: From $318
    09

    Wed

  • BWI–SAT, 12/10/2026: From $318
    10

    Thu

  • BWI–SAT, 12/11/2026: From $266
    11

    Fri

    • Range$145-$596

    *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

    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.

    Explore Flights from Other Popular Origins

    Popular Flights from Baltimore/Washington