American Airlines flights from Boston to Ontario

Recent searches for flights from Boston to Ontario

Aug 2026
From$467*
Updated: 15 hours ago
Round tripIEconomy
Sep 2026
From$367*
Updated: 15 hours ago
Round tripIEconomy
Oct 2026
From$367*
Updated: 15 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $367
cmp-daily-histogram-bars-legend-max-price-aria-label $665
Displaying fares for August-2026
  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    19

    We

    AUG

  • BOS–ONT, 08/20/26 – 08/27/26: From $665
    20

    Th

  • BOS–ONT, 08/21/26 – 08/28/26: From $665
    21

    Fr

  • BOS–ONT, 08/22/26 – 08/29/26: From $567
    22

    Sa

  • BOS–ONT, 08/23/26 – 08/30/26: From $665
    23

    Su

  • BOS–ONT, 08/24/26 – 08/31/26: From $665
    24

    Mo

  • BOS–ONT, 08/25/26 – 09/01/26: From $567
    25

    Tu

  • BOS–ONT, 08/26/26 – 09/02/26: From $542
    26

    We

  • BOS–ONT, 08/27/26 – 09/03/26: From $552
    27

    Th

  • BOS–ONT, 08/28/26 – 09/04/26: From $552
    28

    Fr

  • BOS–ONT, 08/29/26 – 09/05/26: From $467
    29

    Sa

  • BOS–ONT, 08/30/26 – 09/06/26: From $477
    30

    Su

  • BOS–ONT, 08/31/26 – 09/07/26: From $597
    31

    Mo

  • BOS–ONT, 09/01/26 – 09/08/26: From $467
    01

    Tu

    SEP

  • BOS–ONT, 09/02/26 – 09/09/26: From $367
    02

    We

  • BOS–ONT, 09/03/26 – 09/10/26: From $367
    03

    Th

  • BOS–ONT, 09/04/26 – 09/11/26: From $367
    04

    Fr

  • BOS–ONT, 09/05/26 – 09/12/26: From $367
    05

    Sa

  • BOS–ONT, 09/06/26 – 09/13/26: From $442
    06

    Su

  • BOS–ONT, 09/07/26 – 09/14/26: From $562
    07

    Mo

  • BOS–ONT, 09/08/26 – 09/15/26: From $442
    08

    Tu

  • BOS–ONT, 09/09/26 – 09/16/26: From $367
    09

    We

  • BOS–ONT, 09/10/26 – 09/17/26: From $442
    10

    Th

  • BOS–ONT, 09/11/26 – 09/18/26: From $367
    11

    Fr

  • BOS–ONT, 09/12/26 – 09/19/26: From $367
    12

    Sa

  • BOS–ONT, 09/13/26 – 09/20/26: From $517
    13

    Su

  • BOS–ONT, 09/14/26 – 09/21/26: From $442
    14

    Mo

  • BOS–ONT, 09/15/26 – 09/22/26: From $367
    15

    Tu

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

    We

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    17

    Th

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

    Fr

    • range$367-$665

    DisclaimerFares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Fares listed may be Basic Economy, which class is subject to additional terms and conditions. Additional baggage fees and charges for optional products and services may apply.

    Find deals on Boston to Ontario flights

    $
    keyboard_arrow_down

    Boston (BOS)to

    Ontario (ONT)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    10/31/26 - 11/07/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    10/03/26 - 10/10/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    10/14/26 - 10/21/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    09/11/26 - 09/18/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    09/12/26 - 09/19/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    09/26/26 - 10/03/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    Boston (BOS)to

    Ontario (ONT)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $367Fare subject to changes
    Updated: 15 hours ago

    *Fares displayed have been collected within the last 24hrs and may no longer be available at time of booking. Some fares listed may include one or more connections that are Basic Economy, which class is subject to additional terms and conditions. Modifying this information may result in a different fare. To find the most updated fare, please visit aa.com. Additional baggage fees and charges for optional products and services may apply.

    Finding cheap flights from Boston to Ontario

    Looking for lower fares on your trip from Boston to Ontario? Here are a few ways to save.

    • Book early: Booking 1 to 3 months ahead can help you find lower fares
    • Be flexible with dates: Midweek travel, like Tuesdays and Wednesdays, can be more affordable
    • Travel during less busy periods: Flying outside peak travel times can help find lower fares and avoid crowds

    Earn up to $500 back on your next American Airlines flight plus, 30,000 bonus miles. Offers vary elsewhere. Opens another site in a new window that may not meet accessibility guidelines.

    Upgrade your flight with Main Cabin Extra

    Make your trip more comfortable with Main Cabin Extra. Enjoy benefits like:

    • Extra legroom: More space with seats at the front of the Main Cabin or in exit rows.
    • Early boarding: Preferred Group 5 boarding allows easier access to overhead bins.
    • Complimentary drinks: Enjoy beer, wine and spirits on flights with full beverage service.

    Discover how Main Cabin Extra can enhance your trip.

    American Airlines flights from Boston to Ontario