American Airlines flights from Ontario to Philadelphia

Recent searches for flights from Ontario to Philadelphia

Aug 2026
From$329*
Updated: 4 hours ago
Round tripIEconomy
Sep 2026
From$329*
Updated: 4 hours ago
Round tripIEconomy
Oct 2026
From$340*
Updated: 4 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $329
cmp-daily-histogram-bars-legend-max-price-aria-label $757
Displaying fares for August-2026
  • ONT–PHL, 08/05/26 – 08/12/26: From $757
    05

    We

    AUG

  • ONT–PHL, 08/06/26 – 08/13/26: From $739
    06

    Th

  • ONT–PHL, 08/07/26 – 08/14/26: From $739
    07

    Fr

  • ONT–PHL, 08/08/26 – 08/15/26: From $559
    08

    Sa

  • ONT–PHL, 08/09/26 – 08/16/26: From $739
    09

    Su

  • ONT–PHL, 08/10/26 – 08/17/26: From $739
    10

    Mo

  • ONT–PHL, 08/11/26 – 08/18/26: From $549
    11

    Tu

  • ONT–PHL, 08/12/26 – 08/19/26: From $549
    12

    We

  • ONT–PHL, 08/13/26 – 08/20/26: From $673
    13

    Th

  • ONT–PHL, 08/14/26 – 08/21/26: From $673
    14

    Fr

  • ONT–PHL, 08/15/26 – 08/22/26: From $554
    15

    Sa

  • ONT–PHL, 08/16/26 – 08/23/26: From $673
    16

    Su

  • ONT–PHL, 08/17/26 – 08/19/26: From $616
    17

    Mo

  • ONT–PHL, 08/18/26 – 08/20/26: From $429
    18

    Tu

  • ONT–PHL, 08/19/26 – 08/26/26: From $453
    19

    We

  • ONT–PHL, 08/20/26 – 08/27/26: From $458
    20

    Th

  • ONT–PHL, 08/21/26 – 08/28/26: From $490
    21

    Fr

  • ONT–PHL, 08/22/26 – 08/29/26: From $453
    22

    Sa

  • ONT–PHL, 08/23/26 – 08/30/26: From $490
    23

    Su

  • ONT–PHL, 08/24/26 – 08/31/26: From $458
    24

    Mo

  • ONT–PHL, 08/25/26 – 09/01/26: From $387
    25

    Tu

  • ONT–PHL, 08/26/26 – 09/02/26: From $347
    26

    We

  • ONT–PHL, 08/27/26 – 09/03/26: From $347
    27

    Th

  • ONT–PHL, 08/28/26 – 09/04/26: From $390
    28

    Fr

  • ONT–PHL, 08/29/26 – 09/05/26: From $329
    29

    Sa

  • ONT–PHL, 08/30/26 – 09/06/26: From $361
    30

    Su

  • ONT–PHL, 08/31/26 – 09/07/26: From $347
    31

    Mo

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

    Tu

    SEP

  • ONT–PHL, 09/02/26 – 09/07/26: From $347
    02

    We

  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    03

    Th

  • ONT–PHL, 09/04/26 – 09/11/26: From $340
    04

    Fr

    • range$329-$757

    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 Philadelphia flights

    $
    keyboard_arrow_down

    Ontario (ONT)to

    Philadelphia (PHL)
    08/29/26 - 09/05/26

    Round trip

    Economy

    from
    $329Fare subject to changes
    Updated: 4 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    09/05/26 - 09/12/26

    Round trip

    Economy

    from
    $329Fare subject to changes
    Updated: 4 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    09/04/26 - 09/11/26

    Round trip

    Economy

    from
    $340Fare subject to changes
    Updated: 16 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/23/26 - 10/30/26

    Round trip

    Economy

    from
    $340Fare subject to changes
    Updated: 4 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    09/06/26 - 09/13/26

    Round trip

    Economy

    from
    $340Fare subject to changes
    Updated: 4 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    09/11/26 - 09/18/26

    Round trip

    Economy

    from
    $340Fare subject to changes
    Updated: 4 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 4 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/31/26 - 11/07/26

    Round trip

    Economy

    from
    $347Fare subject to changes
    Updated: 4 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 Philadelphia

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