American Airlines flights from Philadelphia to Ontario

Recent searches for flights from Philadelphia to Ontario

Sep 2026
From$369*
Updated: 8 hours ago
Round tripIEconomy
Oct 2026
From$369*
Updated: 8 hours ago
Round tripIEconomy
Nov 2026
From$369*
Updated: 8 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $369
cmp-daily-histogram-bars-legend-max-price-aria-label $739
Displaying fares for September-2026
  • PHL–ONT, 09/09/26 – 09/16/26: From $549
    09

    We

    SEP

  • PHL–ONT, 09/10/26 – 09/17/26: From $739
    10

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  • PHL–ONT, 09/11/26 – 09/18/26: From $739
    11

    Fr

  • PHL–ONT, 09/12/26 – 09/19/26: From $549
    12

    Sa

  • PHL–ONT, 09/13/26 – 09/20/26: From $739
    13

    Su

  • PHL–ONT, 09/14/26 – 09/21/26: From $739
    14

    Mo

  • PHL–ONT, 09/15/26 – 09/22/26: From $549
    15

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  • PHL–ONT, 09/16/26 – 09/23/26: From $549
    16

    We

  • PHL–ONT, 09/17/26 – 09/24/26: From $673
    17

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  • PHL–ONT, 09/18/26 – 09/25/26: From $673
    18

    Fr

  • PHL–ONT, 09/19/26 – 09/26/26: From $549
    19

    Sa

  • PHL–ONT, 09/20/26 – 09/26/26: From $644
    20

    Su

  • PHL–ONT, 09/21/26 – 09/28/26: From $673
    21

    Mo

  • PHL–ONT, 09/22/26 – 09/29/26: From $459
    22

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  • PHL–ONT, 09/23/26 – 09/30/26: From $459
    23

    We

  • PHL–ONT, 09/24/26 – 10/01/26: From $563
    24

    Th

  • PHL–ONT, 09/25/26 – 10/02/26: From $498
    25

    Fr

  • PHL–ONT, 09/26/26 – 10/03/26: From $459
    26

    Sa

  • PHL–ONT, 09/27/26 – 10/04/26: From $509
    27

    Su

  • PHL–ONT, 09/28/26 – 10/05/26: From $488
    28

    Mo

  • PHL–ONT, 09/29/26 – 10/06/26: From $369
    29

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  • PHL–ONT, 09/30/26 – 10/07/26: From $369
    30

    We

  • PHL–ONT, 10/01/26 – 10/08/26: From $504
    01

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    OCT

  • PHL–ONT, 10/02/26 – 10/09/26: From $379
    02

    Fr

  • PHL–ONT, 10/03/26 – 10/10/26: From $369
    03

    Sa

  • PHL–ONT, 10/04/26 – 10/11/26: From $390
    04

    Su

  • PHL–ONT, 10/05/26 – 10/12/26: From $444
    05

    Mo

  • PHL–ONT, 10/06/26 – 10/08/26: From $381
    06

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  • PHL–ONT, 10/07/26 – 10/08/26: From $381
    07

    We

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

    Th

    • range$369-$739

    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 Philadelphia to Ontario flights

    $
    keyboard_arrow_down

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

    Ontario (ONT)
    09/30/26 - 10/07/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

    Ontario (ONT)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

    Ontario (ONT)
    10/25/26 - 11/01/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 hours ago

    Philadelphia (PHL)to

    Ontario (ONT)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 8 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 Philadelphia to Ontario

    Looking for lower fares on your trip from Philadelphia 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

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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 Philadelphia to Ontario