Southwest® flights from Ontario/LA to Boston from $174

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Low fares from Ontario/LA to Boston

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Ontario/LA (ONT)to

Boston (BOS)
Depart: 10/29/2026

One-way

Basic

From
$174
Seen: 18 hrs ago

Ontario/LA (ONT)to

Boston (BOS)
Depart: 08/31/2026

One-way

Basic

From
$174
Seen: 6 hrs ago

Ontario/LA (ONT)to

Boston (BOS)
Depart: 10/02/2026

One-way

Basic

From
$174
Seen: 4 hrs ago

Ontario/LA (ONT)to

Boston (BOS)
Depart: 10/15/2026

One-way

Basic

From
$184
Seen: 15 hrs ago

Ontario/LA (ONT)to

Boston (BOS)
Depart: 09/16/2026

One-way

Basic

From
$184
Seen: 13 minutes ago

Ontario/LA (ONT)to

Boston (BOS)
Depart: 08/28/2026

One-way

Basic

From
$184
Seen: 3 minutes ago

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Explore flights from Ontario/LA to Boston

Jul 2026
From$372*
Seen: 9 hrs ago
One Way/Basic
Aug 2026
From$174*
Seen: 6 hrs ago
One Way/Basic
Sep 2026
From$184*
Seen: 13 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $184
Displaying fares for July-2026
  • ONT–BOS, 07/30/2026: From $372
    30

    Thu

    JUL

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    31

    Fri

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    AUG

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    Tue

  • ONT–BOS, 08/05/2026: From $273
    05

    Wed

  • ONT–BOS, 08/06/2026: From $289
    06

    Thu

  • ONT–BOS, 08/07/2026: From $289
    07

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    11

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    12

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    13

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    14

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    16

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    17

    Mon

  • ONT–BOS, 08/18/2026: From $194
    18

    Tue

  • ONT–BOS, 08/19/2026: From $189
    19

    Wed

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    20

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    21

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    22

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    23

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    24

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    25

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    26

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    27

    Thu

  • ONT–BOS, 08/28/2026: From $184
    28

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    29

    Sat

    • Range$184-$372

    *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:
    LA/Ontario International Airport
    Arriving at:
    Logan International Airport
    Distance:
    2566 miles

    Route Information

    82† 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 82 weekly flights from Ontario/LA to Boston on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA 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 Ontario/LA 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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