American Airlines flights from Ontario to Boston

Recent searches for flights from Ontario to Boston

Sep 2026
From$387*
Updated: 5 hours ago
Round tripIEconomy
Oct 2026
From$251*
Updated: 5 hours ago
Round tripIEconomy
Nov 2026
From$251*
Updated: 5 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $387
cmp-daily-histogram-bars-legend-max-price-aria-label $865
Displaying fares for September-2026
  • ONT–BOS, 09/15/26 – 09/22/26: From $587
    15

    Tu

    SEP

  • ONT–BOS, 09/16/26 – 09/23/26: From $587
    16

    We

  • ONT–BOS, 09/17/26 – 09/24/26: From $685
    17

    Th

  • ONT–BOS, 09/18/26 – 09/25/26: From $685
    18

    Fr

  • ONT–BOS, 09/19/26 – 09/26/26: From $587
    19

    Sa

  • ONT–BOS, 09/20/26 – 09/21/26: From $755
    20

    Su

  • ONT–BOS, 09/21/26 – 09/28/26: From $688
    21

    Mo

  • ONT–BOS, 09/22/26 – 09/29/26: From $487
    22

    Tu

  • ONT–BOS, 09/23/26 – 09/30/26: From $487
    23

    We

  • ONT–BOS, 09/24/26 – 10/01/26: From $814
    24

    Th

  • ONT–BOS, 09/25/26 – 09/29/26: From $497
    25

    Fr

  • ONT–BOS, 09/26/26 – 10/03/26: From $487
    26

    Sa

  • ONT–BOS, 09/27/26 – 10/04/26: From $731
    27

    Su

  • ONT–BOS, 09/28/26 – 10/05/26: From $599
    28

    Mo

  • ONT–BOS, 09/29/26 – 10/06/26: From $387
    29

    Tu

  • ONT–BOS, 09/30/26 – 10/07/26: From $463
    30

    We

  • ONT–BOS, 10/01/26 – 10/08/26: From $702
    01

    Th

    OCT

  • ONT–BOS, 10/02/26 – 10/05/26: From $599
    02

    Fr

  • ONT–BOS, 10/03/26 – 10/10/26: From $487
    03

    Sa

  • ONT–BOS, 10/04/26 – 10/11/26: From $697
    04

    Su

  • ONT–BOS, 10/05/26 – 10/12/26: From $682
    05

    Mo

  • ONT–BOS, 10/06/26 – 10/13/26: From $498
    06

    Tu

  • ONT–BOS, 10/07/26 – 10/14/26: From $587
    07

    We

  • ONT–BOS, 10/08/26 – 10/15/26: From $697
    08

    Th

  • ONT–BOS, 10/09/26 – 10/16/26: From $642
    09

    Fr

  • ONT–BOS, 10/10/26 – 10/17/26: From $519
    10

    Sa

  • ONT–BOS, 10/11/26 – 10/18/26: From $865
    11

    Su

  • ONT–BOS, 10/12/26 – 10/19/26: From $588
    12

    Mo

  • ONT–BOS, 10/13/26 – 10/16/26: From $463
    13

    Tu

  • ONT–BOS, 10/14/26 – 10/16/26: From $539
    14

    We

    • range$387-$865

    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 Ontario to Boston flights

    $
    keyboard_arrow_down

    Ontario (ONT)to

    Boston (BOS)
    11/24/26 - 12/01/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    12/05/26 - 12/12/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    11/25/26 - 12/02/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 hours ago

    Ontario (ONT)to

    Boston (BOS)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $251Fare subject to changes
    Updated: 5 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 Ontario to Boston

    Looking for lower fares on your trip from Ontario to Boston? 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

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    • 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 Ontario to Boston