Southwest® flights from Washington D.C. Reagan National to San Antonio from $140

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Low fares from Washington D.C. Reagan National to San Antonio

$

Washington D.C. Reagan National (DCA)to

San Antonio (SAT)
Depart: 10/29/2026

One-way

Basic

From
$140
Seen: 22 hrs ago

Washington D.C. Reagan National (DCA)to

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

One-way

Basic

From
$140
Seen: 21 hrs ago

Washington D.C. Reagan National (DCA)to

San Antonio (SAT)
Depart: 10/14/2026

One-way

Basic

From
$140
Seen: 19 hrs ago

Washington D.C. Reagan National (DCA)to

San Antonio (SAT)
Depart: 10/07/2026

One-way

Basic

From
$140
Seen: 5 hrs ago

Washington D.C. Reagan National (DCA)to

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

One-way

Basic

From
$140
Seen: 23 hrs ago

Washington D.C. Reagan National (DCA)to

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

One-way

Basic

From
$140
Seen: 13 hrs ago

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Explore flights from Washington D.C. Reagan National to San Antonio

Sep 2026
From$145*
Seen: 13 hrs ago
One Way/Basic
Oct 2026
From$140*
Seen: 13 hrs ago
One Way/Basic
Nov 2026
From$140*
Seen: 1 hour ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $140
cmp-daily-histogram-bars-legend-max-price-aria-label $369
Displaying fares for September-2026
  • DCA–SAT, 09/11/2026: From $320
    11

    Fri

    SEP

  • DCA–SAT, 09/12/2026: From $284
    12

    Sat

  • DCA–SAT, 09/13/2026: From $369
    13

    Sun

  • DCA–SAT, 09/14/2026: From $330
    14

    Mon

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

    Tue

  • DCA–SAT, 09/16/2026: From $284
    16

    Wed

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

    Thu

  • DCA–SAT, 09/18/2026: From $265
    18

    Fri

  • DCA–SAT, 09/19/2026: From $265
    19

    Sat

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

    Sun

  • DCA–SAT, 09/21/2026: From $265
    21

    Mon

  • DCA–SAT, 09/22/2026: From $260
    22

    Tue

  • DCA–SAT, 09/23/2026: From $270
    23

    Wed

  • DCA–SAT, 09/24/2026: From $205
    24

    Thu

  • DCA–SAT, 09/25/2026: From $210
    25

    Fri

  • DCA–SAT, 09/26/2026: From $220
    26

    Sat

  • DCA–SAT, 09/27/2026: From $314
    27

    Sun

  • DCA–SAT, 09/28/2026: From $210
    28

    Mon

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

    Tue

  • DCA–SAT, 09/30/2026: From $145
    30

    Wed

  • DCA–SAT, 10/01/2026: From $215
    01

    Thu

    OCT

  • DCA–SAT, 10/02/2026: From $185
    02

    Fri

  • DCA–SAT, 10/03/2026: From $145
    03

    Sat

  • DCA–SAT, 10/04/2026: From $185
    04

    Sun

  • DCA–SAT, 10/05/2026: From $140
    05

    Mon

  • DCA–SAT, 10/06/2026: From $140
    06

    Tue

  • DCA–SAT, 10/07/2026: From $140
    07

    Wed

  • DCA–SAT, 10/08/2026: From $145
    08

    Thu

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

    Fri

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

    Sat

    • Range$140-$369

    *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:
    Ronald Reagan National Airport
    Arriving at:
    San Antonio International Airport
    Distance:
    1380 miles

    Route Information

    152† 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 152 weekly flights from Washington, D.C. (Reagan National) to San Antonio on Southwest Airlines.
    To find the lowest fares by day and time to fly Washington, D.C. (Reagan National) 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 Washington, D.C. (Reagan National) 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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