American Airlines flights from Boston to Ontario

Recent searches for flights from Boston to Ontario

Jul 2026
From$665*
Updated: 11 minutes ago
Round tripIEconomy
Aug 2026
From$347*
Updated: 11 minutes ago
Round tripIEconomy
Sep 2026
From$347*
Updated: 11 minutes ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $347
cmp-daily-histogram-bars-legend-max-price-aria-label $835
Displaying fares for July-2026
  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    30

    Th

    JUL

  • BOS–ONT, 07/31/26 – 08/07/26: From $665
    31

    Fr

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

    Sa

    AUG

  • BOS–ONT, 08/02/26 – 08/09/26: From $665
    02

    Su

  • BOS–ONT, 08/03/26 – 08/10/26: From $665
    03

    Mo

  • BOS–ONT, 08/04/26 – 08/11/26: From $567
    04

    Tu

  • BOS–ONT, 08/05/26 – 08/12/26: From $572
    05

    We

  • BOS–ONT, 08/06/26 – 08/13/26: From $518
    06

    Th

  • BOS–ONT, 08/07/26 – 08/14/26: From $601
    07

    Fr

  • BOS–ONT, 08/08/26 – 08/15/26: From $723
    08

    Sa

  • BOS–ONT, 08/09/26 – 08/16/26: From $835
    09

    Su

  • BOS–ONT, 08/10/26 – 08/17/26: From $645
    10

    Mo

  • BOS–ONT, 08/11/26 – 08/18/26: From $508
    11

    Tu

  • BOS–ONT, 08/12/26 – 08/19/26: From $508
    12

    We

  • BOS–ONT, 08/13/26 – 08/20/26: From $493
    13

    Th

  • BOS–ONT, 08/14/26 – 08/21/26: From $483
    14

    Fr

  • BOS–ONT, 08/15/26 – 08/22/26: From $537
    15

    Sa

  • BOS–ONT, 08/16/26 – 08/23/26: From $487
    16

    Su

  • BOS–ONT, 08/17/26 – 08/24/26: From $493
    17

    Mo

  • BOS–ONT, 08/18/26 – 08/25/26: From $387
    18

    Tu

  • BOS–ONT, 08/19/26 – 08/26/26: From $387
    19

    We

  • BOS–ONT, 08/20/26 – 08/27/26: From $347
    20

    Th

  • BOS–ONT, 08/21/26 – 08/28/26: From $429
    21

    Fr

  • BOS–ONT, 08/22/26 – 08/29/26: From $347
    22

    Sa

  • BOS–ONT, 08/23/26 – 08/30/26: From $449
    23

    Su

  • BOS–ONT, 08/24/26 – 08/31/26: From $358
    24

    Mo

  • BOS–ONT, 08/25/26 – 09/01/26: From $347
    25

    Tu

  • BOS–ONT, 08/26/26 – 09/02/26: From $380
    26

    We

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    27

    Th

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

    Fr

  • BOS–ONT: cmp-view-offers-disclaimer. Find Offers
    29

    Sa

    • range$347-$835

    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)
    09/12/26 - 09/19/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    10/13/26 - 10/20/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    10/22/26 - 10/29/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    09/29/26 - 10/06/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    09/01/26 - 09/08/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    09/05/26 - 09/12/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes ago

    Boston (BOS)to

    Ontario (ONT)
    09/07/26 - 09/14/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 11 minutes 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