Southwest® flights from Boston to Ontario/LA from $126

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Low fares from Boston to Ontario/LA

$

Boston (BOS)to

Ontario/LA (ONT)
Depart: 11/17/2026

One-way

Basic

From
$126
Seen: 12 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 11/11/2026

One-way

Basic

From
$126
Seen: 22 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 11/04/2026

One-way

Basic

From
$126
Seen: 2 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 12/02/2026

One-way

Basic

From
$126
Seen: 5 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 01/06/2027

One-way

Basic

From
$126
Seen: 4 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 10/31/2026

One-way

Basic

From
$131
Seen: 22 hrs ago

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Explore flights from Boston to Ontario/LA

Oct 2026
From$131*
Seen: 22 hrs ago
One Way/Basic
Nov 2026
From$126*
Seen: 22 hrs ago
One Way/Basic
Dec 2026
From$126*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $126
cmp-daily-histogram-bars-legend-max-price-aria-label $304
Displaying fares for October-2026
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  • BOS–ONT, 10/17/2026: From $283
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  • BOS–ONT, 10/22/2026: From $260
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  • BOS–ONT, 10/23/2026: From $260
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  • BOS–ONT, 10/25/2026: From $304
    25

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  • BOS–ONT, 10/31/2026: From $131
    31

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  • BOS–ONT, 11/01/2026: From $225
    01

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    NOV

  • BOS–ONT, 11/02/2026: From $215
    02

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  • BOS–ONT, 11/03/2026: From $142
    03

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  • BOS–ONT, 11/04/2026: From $126
    04

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  • BOS–ONT, 11/06/2026: From $254
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    • Range$126-$304

    *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:
    LA/Ontario International Airport
    Distance:
    2566 miles

    Questions we hear the most

    There are 90 weekly flights from Boston to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Boston to Ontario/LA with Southwest, check out our Low Fare Calendar.
    You can rent a car at LA/Ontario International Airport book yours with your flight.
    Yes! Flights from Boston to Ontario/LA—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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