American Airlines flights from Ontario to Portland, OR

Recent searches for flights from Ontario to Portland, OR

Sep 2026
From$293*
Updated: 15 hours ago
Round tripIEconomy
Oct 2026
From$277*
Updated: 15 hours ago
Round tripIEconomy
Nov 2026
From$277*
Updated: 15 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $283
cmp-daily-histogram-bars-legend-max-price-aria-label $885
Displaying fares for September-2026
  • ONT–PDX, 09/11/26 – 09/18/26: From $634
    11

    Fr

    SEP

  • ONT–PDX, 09/12/26 – 09/19/26: From $701
    12

    Sa

  • ONT–PDX, 09/13/26 – 09/20/26: From $619
    13

    Su

  • ONT–PDX, 09/14/26 – 09/21/26: From $885
    14

    Mo

  • ONT–PDX, 09/15/26 – 09/22/26: From $701
    15

    Tu

  • ONT–PDX, 09/16/26 – 09/23/26: From $701
    16

    We

  • ONT–PDX, 09/17/26 – 09/24/26: From $327
    17

    Th

  • ONT–PDX, 09/18/26 – 09/25/26: From $369
    18

    Fr

  • ONT–PDX, 09/19/26 – 09/26/26: From $638
    19

    Sa

  • ONT–PDX, 09/20/26 – 09/27/26: From $429
    20

    Su

  • ONT–PDX, 09/21/26 – 09/28/26: From $674
    21

    Mo

  • ONT–PDX, 09/22/26 – 09/29/26: From $638
    22

    Tu

  • ONT–PDX, 09/23/26 – 09/30/26: From $638
    23

    We

  • ONT–PDX, 09/24/26 – 10/01/26: From $334
    24

    Th

  • ONT–PDX, 09/25/26 – 10/02/26: From $382
    25

    Fr

  • ONT–PDX, 09/26/26 – 10/03/26: From $380
    26

    Sa

  • ONT–PDX, 09/27/26 – 10/04/26: From $384
    27

    Su

  • ONT–PDX, 09/28/26 – 10/05/26: From $293
    28

    Mo

  • ONT–PDX, 09/29/26 – 10/06/26: From $293
    29

    Tu

  • ONT–PDX, 09/30/26 – 10/07/26: From $293
    30

    We

  • ONT–PDX, 10/01/26 – 10/08/26: From $401
    01

    Th

    OCT

  • ONT–PDX, 10/02/26 – 10/09/26: From $393
    02

    Fr

  • ONT–PDX, 10/03/26 – 10/10/26: From $283
    03

    Sa

  • ONT–PDX, 10/04/26 – 10/09/26: From $615
    04

    Su

  • ONT–PDX, 10/05/26 – 10/12/26: From $314
    05

    Mo

  • ONT–PDX, 10/06/26 – 10/13/26: From $283
    06

    Tu

  • ONT–PDX, 10/07/26 – 10/14/26: From $283
    07

    We

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

    Th

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

    Fr

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

    Sa

    • range$283-$885

    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, OR flights

    $
    keyboard_arrow_down

    Ontario (ONT)to

    Portland, OR (PDX)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    12/02/26 - 12/09/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    11/04/26 - 11/11/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    10/14/26 - 10/21/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    10/31/26 - 11/07/26

    Round trip

    Economy

    from
    $277Fare subject to changes
    Updated: 15 hours ago

    Ontario (ONT)to

    Portland, OR (PDX)
    12/01/26 - 12/08/26

    Round trip

    Economy

    from
    $277Fare 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 Ontario to Portland, OR

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