Southwest® flights from Boston to Ontario/LA from $168

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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
$168
Seen: 16 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 12/09/2026

One-way

Basic

From
$168
Seen: 6 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 12/15/2026

One-way

Basic

From
$168
Seen: 12 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 12/16/2026

One-way

Basic

From
$188
Seen: 22 hrs ago

Boston (BOS)to

Ontario/LA (ONT)
Depart: 11/14/2026

One-way

Basic

From
$204
Seen: 21 hrs ago

Boston (BOS)to

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

One-way

Basic

From
$204
Seen: 21 hrs ago

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Explore flights from Boston to Ontario/LA

Oct 2026
From$375*
Seen: 15 hrs ago
One Way/Basic
Nov 2026
From$168*
Seen: 16 hrs ago
One Way/Basic
Dec 2026
From$168*
Seen: 12 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $168
cmp-daily-histogram-bars-legend-max-price-aria-label $375
Displaying fares for October-2026
  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

    OCT

  • BOS–ONT, 10/29/2026: From $375
    29

    Thu

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    30

    Fri

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    31

    Sat

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    01

    Sun

    NOV

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

    Mon

  • BOS–ONT, 11/03/2026: From $293
    03

    Tue

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    04

    Wed

  • BOS–ONT, 11/05/2026: From $314
    05

    Thu

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    06

    Fri

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    07

    Sat

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    08

    Sun

  • BOS–ONT, 11/09/2026: From $314
    09

    Mon

  • BOS–ONT, 11/10/2026: From $209
    10

    Tue

  • BOS–ONT, 11/11/2026: From $204
    11

    Wed

  • BOS–ONT, 11/12/2026: From $260
    12

    Thu

  • BOS–ONT, 11/13/2026: From $209
    13

    Fri

  • BOS–ONT, 11/14/2026: From $204
    14

    Sat

  • BOS–ONT, 11/15/2026: From $265
    15

    Sun

  • BOS–ONT, 11/16/2026: From $260
    16

    Mon

  • BOS–ONT, 11/17/2026: From $168
    17

    Tue

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

    Wed

  • BOS–ONT, 11/19/2026: From $245
    19

    Thu

  • BOS–ONT, 11/20/2026: From $275
    20

    Fri

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

    Sat

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

    Sun

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    23

    Mon

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    24

    Tue

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

    Wed

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

    Thu

  • BOS–ONT, 11/27/2026: From $314
    27

    Fri

    • Range$168-$375

    *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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