Southwest® flights from Boston to San Diego from $119

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Low fares from Boston to San Diego

$

Boston (BOS)to

San Diego (SAN)
Depart: 11/18/2026

One-way

Basic

From
$119
Seen: 10 hrs ago

Boston (BOS)to

San Diego (SAN)
Depart: 10/03/2026

One-way

Basic

From
$119
Seen: 21 hrs ago

Boston (BOS)to

San Diego (SAN)
Depart: 11/17/2026

One-way

Basic

From
$119
Seen: 3 hrs ago

Boston (BOS)to

San Diego (SAN)
Depart: 10/27/2026

One-way

Basic

From
$119
Seen: 6 hrs ago

Boston (BOS)to

San Diego (SAN)
Depart: 11/10/2026

One-way

Basic

From
$119
Seen: 3 hrs ago

Boston (BOS)to

San Diego (SAN)
Depart: 09/23/2026

One-way

Basic

From
$119
Seen: 2 hrs ago

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Explore flights from Boston to San Diego

Aug 2026
From$296*
Seen: 11 hrs ago
One Way/Basic
Sep 2026
From$119*
Seen: 2 hrs ago
One Way/Basic
Oct 2026
From$119*
Seen: 6 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $129
cmp-daily-histogram-bars-legend-max-price-aria-label $401
Displaying fares for August-2026
  • BOS–SAN, 08/21/2026: From $391
    21

    Fri

    AUG

  • BOS–SAN, 08/22/2026: From $316
    22

    Sat

  • BOS–SAN, 08/23/2026: From $316
    23

    Sun

  • BOS–SAN, 08/24/2026: From $401
    24

    Mon

  • BOS–SAN, 08/25/2026: From $391
    25

    Tue

  • BOS–SAN, 08/26/2026: From $391
    26

    Wed

  • BOS–SAN, 08/27/2026: From $296
    27

    Thu

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

    Fri

  • BOS–SAN, 08/29/2026: From $296
    29

    Sat

  • BOS–SAN, 08/30/2026: From $296
    30

    Sun

  • BOS–SAN, 08/31/2026: From $296
    31

    Mon

  • BOS–SAN, 09/01/2026: From $296
    01

    Tue

    SEP

  • BOS–SAN, 09/02/2026: From $296
    02

    Wed

  • BOS–SAN, 09/03/2026: From $199
    03

    Thu

  • BOS–SAN, 09/04/2026: From $199
    04

    Fri

  • BOS–SAN, 09/05/2026: From $199
    05

    Sat

  • BOS–SAN, 09/06/2026: From $199
    06

    Sun

  • BOS–SAN, 09/07/2026: From $336
    07

    Mon

  • BOS–SAN, 09/08/2026: From $189
    08

    Tue

  • BOS–SAN, 09/09/2026: From $222
    09

    Wed

  • BOS–SAN, 09/10/2026: From $129
    10

    Thu

  • BOS–SAN, 09/11/2026: From $142
    11

    Fri

  • BOS–SAN, 09/12/2026: From $139
    12

    Sat

  • BOS–SAN, 09/13/2026: From $255
    13

    Sun

  • BOS–SAN, 09/14/2026: From $256
    14

    Mon

  • BOS–SAN, 09/15/2026: From $129
    15

    Tue

  • BOS–SAN, 09/16/2026: From $139
    16

    Wed

  • BOS–SAN, 09/17/2026: From $189
    17

    Thu

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

    Fri

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

    Sat

  • BOS–SAN, 09/20/2026: From $223
    20

    Sun

    • Range$129-$401

    *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:
    Logan International Airport
    Arriving at:
    San Diego International Airport
    Distance:
    2588 miles

    Route Information

    148† 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 148 weekly flights from Boston to San Diego on Southwest Airlines.
    To find the lowest fares by day and time to fly Boston to San Diego with Southwest, check out our Low Fare Calendar.
    You can rent a car at San Diego International Airport book yours with your flight.
    Yes! Flights from Boston to San Diego—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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