American Airlines flights from Ontario to Portland, ME

Recent searches for flights from Ontario to Portland, ME

Sep 2026
From$506*
Updated: 3 hours ago
Round tripIEconomy
Oct 2026
From$359*
Updated: 3 hours ago
Round tripIEconomy
Nov 2026
From$370*
Updated: 3 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $506
cmp-daily-histogram-bars-legend-max-price-aria-label $1.2K
Displaying fares for September-2026
  • ONT–PWM, 09/11/26 – 09/18/26: From $930
    11

    Fr

    SEP

  • ONT–PWM, 09/12/26 – 09/19/26: From $795
    12

    Sa

  • ONT–PWM, 09/13/26 – 09/20/26: From $976
    13

    Su

  • ONT–PWM, 09/14/26 – 09/21/26: From $1,032
    14

    Mo

  • ONT–PWM, 09/15/26 – 09/22/26: From $795
    15

    Tu

  • ONT–PWM, 09/16/26 – 09/23/26: From $597
    16

    We

  • ONT–PWM, 09/17/26 – 09/24/26: From $1,198
    17

    Th

  • ONT–PWM, 09/18/26 – 09/25/26: From $874
    18

    Fr

  • ONT–PWM, 09/19/26 – 09/26/26: From $559
    19

    Sa

  • ONT–PWM, 09/20/26 – 09/25/26: From $664
    20

    Su

  • ONT–PWM, 09/21/26 – 09/28/26: From $1,157
    21

    Mo

  • ONT–PWM, 09/22/26 – 09/29/26: From $587
    22

    Tu

  • ONT–PWM, 09/23/26 – 09/30/26: From $776
    23

    We

  • ONT–PWM, 09/24/26 – 10/01/26: From $1,155
    24

    Th

  • ONT–PWM, 09/25/26 – 10/02/26: From $871
    25

    Fr

  • ONT–PWM, 09/26/26 – 10/03/26: From $506
    26

    Sa

  • ONT–PWM, 09/27/26 – 10/04/26: From $1,032
    27

    Su

  • ONT–PWM, 09/28/26 – 10/05/26: From $884
    28

    Mo

  • ONT–PWM, 09/29/26 – 10/06/26: From $517
    29

    Tu

  • ONT–PWM, 09/30/26 – 10/07/26: From $691
    30

    We

  • ONT–PWM, 10/01/26 – 10/08/26: From $979
    01

    Th

    OCT

  • ONT–PWM, 10/02/26 – 10/09/26: From $843
    02

    Fr

  • ONT–PWM, 10/03/26 – 10/10/26: From $695
    03

    Sa

  • ONT–PWM, 10/04/26 – 10/11/26: From $867
    04

    Su

  • ONT–PWM, 10/05/26 – 10/12/26: From $764
    05

    Mo

  • ONT–PWM, 10/06/26 – 10/13/26: From $840
    06

    Tu

  • ONT–PWM, 10/07/26 – 10/14/26: From $732
    07

    We

  • ONT–PWM: cmp-view-offers-disclaimer. Find Offers
    08

    Th

  • ONT–PWM: cmp-view-offers-disclaimer. Find Offers
    09

    Fr

  • ONT–PWM: cmp-view-offers-disclaimer. Find Offers
    10

    Sa

    • range$506-$1,198

    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 Portland, ME flights

    $
    keyboard_arrow_down

    Ontario (ONT)to

    Portland, ME (PWM)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $359Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    10/23/26 - 10/30/26

    Round trip

    Economy

    from
    $364Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    10/20/26 - 10/27/26

    Round trip

    Economy

    from
    $364Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $370Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    12/06/26 - 12/13/26

    Round trip

    Economy

    from
    $370Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    12/05/26 - 12/12/26

    Round trip

    Economy

    from
    $370Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $370Fare subject to changes
    Updated: 3 hours ago

    Ontario (ONT)to

    Portland, ME (PWM)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $372Fare subject to changes
    Updated: 3 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 Portland, ME

    Looking for lower fares on your trip from Ontario to Portland, ME? 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 Portland, ME