Southwest® flights from San Antonio to Boston from $145

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Low fares from San Antonio to Boston

$

San Antonio (SAT)to

Boston (BOS)
Depart: 11/13/2026

One-way

Basic

From
$145
Seen: 22 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 10/20/2026

One-way

Basic

From
$155
Seen: 18 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 10/13/2026

One-way

Basic

From
$155
Seen: 16 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 10/17/2026

One-way

Basic

From
$155
Seen: 20 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 10/19/2026

One-way

Basic

From
$155
Seen: 14 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 12/17/2026

One-way

Basic

From
$155
Seen: 14 hrs ago

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Explore flights from San Antonio to Boston

Sep 2026
From$235*
Seen: 10 hrs ago
One Way/Basic
Oct 2026
From$155*
Seen: 16 hrs ago
One Way/Basic
Nov 2026
From$145*
Seen: 22 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $185
cmp-daily-histogram-bars-legend-max-price-aria-label $519
Displaying fares for September-2026
  • SAT–BOS, 09/12/2026: From $385
    12

    Sat

    SEP

  • SAT–BOS, 09/13/2026: From $385
    13

    Sun

  • SAT–BOS, 09/14/2026: From $385
    14

    Mon

  • SAT–BOS, 09/15/2026: From $385
    15

    Tue

  • SAT–BOS, 09/16/2026: From $385
    16

    Wed

  • SAT–BOS, 09/17/2026: From $320
    17

    Thu

  • SAT–BOS: cmp-view-offers-disclaimer. Find Offers
    18

    Fri

  • SAT–BOS, 09/19/2026: From $285
    19

    Sat

  • SAT–BOS, 09/20/2026: From $275
    20

    Sun

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

    Mon

  • SAT–BOS, 09/22/2026: From $285
    22

    Tue

  • SAT–BOS, 09/23/2026: From $285
    23

    Wed

  • SAT–BOS, 09/24/2026: From $519
    24

    Thu

  • SAT–BOS, 09/25/2026: From $380
    25

    Fri

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

    Sat

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

    Sun

  • SAT–BOS, 09/28/2026: From $235
    28

    Mon

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

    Tue

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

    Wed

  • SAT–BOS, 10/01/2026: From $285
    01

    Thu

    OCT

  • SAT–BOS: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

  • SAT–BOS: cmp-view-offers-disclaimer. Find Offers
    03

    Sat

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

    Sun

  • SAT–BOS, 10/05/2026: From $185
    05

    Mon

  • SAT–BOS, 10/06/2026: From $185
    06

    Tue

  • SAT–BOS, 10/07/2026: From $208
    07

    Wed

  • SAT–BOS, 10/08/2026: From $484
    08

    Thu

  • SAT–BOS, 10/09/2026: From $484
    09

    Fri

  • SAT–BOS, 10/10/2026: From $240
    10

    Sat

  • SAT–BOS: cmp-view-offers-disclaimer. Find Offers
    11

    Sun

    • Range$185-$519

    *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:
    San Antonio International Airport
    Arriving at:
    Logan International Airport
    Distance:
    1764 miles

    Route Information

    145† 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 145 weekly flights from San Antonio to Boston on Southwest Airlines.
    To find the lowest fares by day and time to fly San Antonio to Boston with Southwest, check out our Low Fare Calendar.
    You can rent a car at Logan International Airport book yours with your flight.
    Yes! Flights from San Antonio to Boston—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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