Southwest® flights from San Antonio to Boston from $139

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Low fares from San Antonio to Boston

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San Antonio (SAT)to

Boston (BOS)
Depart: 10/30/2026

One-way

Basic

From
$139
Seen: 37 minutes ago

San Antonio (SAT)to

Boston (BOS)
Depart: 09/11/2026

One-way

Basic

From
$139
Seen: 16 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 09/06/2026

One-way

Basic

From
$139
Seen: 17 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 09/05/2026

One-way

Basic

From
$139
Seen: 13 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 09/14/2026

One-way

Basic

From
$145
Seen: 17 hrs ago

San Antonio (SAT)to

Boston (BOS)
Depart: 09/28/2026

One-way

Basic

From
$145
Seen: 3 hrs ago

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Explore flights from San Antonio to Boston

Aug 2026
From$152*
Seen: 7 hrs ago
One Way/Basic
Sep 2026
From$139*
Seen: 16 hrs ago
One Way/Basic
Oct 2026
From$139*
Seen: 37 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $145
cmp-daily-histogram-bars-legend-max-price-aria-label $380
Displaying fares for August-2026
  • SAT–BOS, 08/02/2026: From $380
    02

    Sun

    AUG

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

    Mon

  • SAT–BOS, 08/04/2026: From $375
    04

    Tue

  • SAT–BOS, 08/05/2026: From $375
    05

    Wed

  • SAT–BOS: cmp-view-offers-disclaimer. Find Offers
    06

    Thu

  • SAT–BOS, 08/07/2026: From $375
    07

    Fri

  • SAT–BOS, 08/08/2026: From $275
    08

    Sat

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

    Sun

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    10

    Mon

  • SAT–BOS, 08/11/2026: From $275
    11

    Tue

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    12

    Wed

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

    Thu

  • SAT–BOS, 08/14/2026: From $275
    14

    Fri

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    15

    Sat

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

    Sun

  • SAT–BOS, 08/17/2026: From $225
    17

    Mon

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

    Tue

  • SAT–BOS: cmp-view-offers-disclaimer. Find Offers
    19

    Wed

  • SAT–BOS, 08/20/2026: From $225
    20

    Thu

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    21

    Fri

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

    Sat

  • SAT–BOS, 08/23/2026: From $200
    23

    Sun

  • SAT–BOS, 08/24/2026: From $152
    24

    Mon

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

    Tue

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

    Wed

  • SAT–BOS, 08/27/2026: From $152
    27

    Thu

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

    Fri

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

    Sat

  • SAT–BOS, 08/30/2026: From $175
    30

    Sun

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

    Mon

  • SAT–BOS, 09/01/2026: From $145
    01

    Tue

    SEP

    • Range$145-$380

    *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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