American Airlines flights from Ontario to Philadelphia

Recent searches for flights from Ontario to Philadelphia

Aug 2026
From$453*
Updated: 23 hours ago
Round tripIEconomy
Sep 2026
From$357*
Updated: 2 hours ago
Round tripIEconomy
Oct 2026
From$357*
Updated: 2 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $357
cmp-daily-histogram-bars-legend-max-price-aria-label $739
Displaying fares for August-2026
  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    25

    Tu

    AUG

  • ONT–PHL, 08/26/26 – 09/16/26: From $453
    26

    We

  • ONT–PHL, 08/27/26 – 09/03/26: From $739
    27

    Th

  • ONT–PHL, 08/28/26 – 08/29/26: From $644
    28

    Fr

  • ONT–PHL, 08/29/26 – 09/05/26: From $549
    29

    Sa

  • ONT–PHL, 08/30/26 – 09/06/26: From $739
    30

    Su

  • ONT–PHL, 08/31/26 – 09/02/26: From $705
    31

    Mo

  • ONT–PHL, 09/01/26 – 09/08/26: From $549
    01

    Tu

    SEP

  • ONT–PHL, 09/02/26 – 09/09/26: From $549
    02

    We

  • ONT–PHL, 09/03/26 – 09/10/26: From $673
    03

    Th

  • ONT–PHL, 09/04/26 – 09/11/26: From $673
    04

    Fr

  • ONT–PHL, 09/05/26 – 09/12/26: From $462
    05

    Sa

  • ONT–PHL, 09/06/26 – 09/13/26: From $491
    06

    Su

  • ONT–PHL, 09/07/26 – 09/14/26: From $739
    07

    Mo

  • ONT–PHL, 09/08/26 – 09/15/26: From $453
    08

    Tu

  • ONT–PHL, 09/09/26 – 09/16/26: From $366
    09

    We

  • ONT–PHL, 09/10/26 – 09/17/26: From $507
    10

    Th

  • ONT–PHL, 09/11/26 – 09/18/26: From $447
    11

    Fr

  • ONT–PHL, 09/12/26 – 09/19/26: From $366
    12

    Sa

  • ONT–PHL, 09/13/26 – 09/20/26: From $509
    13

    Su

  • ONT–PHL, 09/14/26 – 09/17/26: From $519
    14

    Mo

  • ONT–PHL, 09/15/26 – 09/22/26: From $357
    15

    Tu

  • ONT–PHL, 09/16/26 – 09/23/26: From $357
    16

    We

  • ONT–PHL, 09/17/26 – 09/24/26: From $573
    17

    Th

  • ONT–PHL, 09/18/26 – 09/25/26: From $380
    18

    Fr

  • ONT–PHL, 09/19/26 – 09/26/26: From $357
    19

    Sa

  • ONT–PHL, 09/20/26 – 09/27/26: From $390
    20

    Su

  • ONT–PHL, 09/21/26 – 09/28/26: From $498
    21

    Mo

  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    22

    Tu

  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    23

    We

  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    24

    Th

    • range$357-$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 Ontario to Philadelphia flights

    $
    keyboard_arrow_down

    Ontario (ONT)to

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

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/07/26 - 10/14/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    09/26/26 - 10/03/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    09/30/26 - 10/07/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    11/03/26 - 11/10/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/27/26 - 11/03/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 hours ago

    Ontario (ONT)to

    Philadelphia (PHL)
    10/03/26 - 10/10/26

    Round trip

    Economy

    from
    $357Fare subject to changes
    Updated: 2 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