American Airlines flights from Greenville to Ontario

Recent searches for flights from Greenville to Ontario

Jul 2026
From$1,014*
Updated: 13 hours ago
Round tripIEconomy
Aug 2026
From$369*
Updated: 17 hours ago
Round tripIEconomy
Sep 2026
From$369*
Updated: 17 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $369
cmp-daily-histogram-bars-legend-max-price-aria-label $1.1K
Displaying fares for July-2026
  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    30

    Th

    JUL

  • GSP–ONT, 07/31/26 – 08/03/26: From $1,014
    31

    Fr

  • GSP–ONT, 08/01/26 – 08/14/26: From $865
    01

    Sa

    AUG

  • GSP–ONT, 08/02/26 – 08/09/26: From $1,052
    02

    Su

  • GSP–ONT, 08/03/26 – 08/10/26: From $1,052
    03

    Mo

  • GSP–ONT, 08/04/26 – 08/11/26: From $1,024
    04

    Tu

  • GSP–ONT, 08/05/26 – 08/12/26: From $842
    05

    We

  • GSP–ONT, 08/06/26 – 08/13/26: From $842
    06

    Th

  • GSP–ONT, 08/07/26 – 08/14/26: From $842
    07

    Fr

  • GSP–ONT, 08/08/26 – 08/15/26: From $842
    08

    Sa

  • GSP–ONT, 08/09/26 – 08/16/26: From $842
    09

    Su

  • GSP–ONT, 08/10/26 – 08/17/26: From $842
    10

    Mo

  • GSP–ONT, 08/11/26 – 08/18/26: From $842
    11

    Tu

  • GSP–ONT, 08/12/26 – 08/19/26: From $483
    12

    We

  • GSP–ONT, 08/13/26 – 08/20/26: From $483
    13

    Th

  • GSP–ONT, 08/14/26 – 08/21/26: From $515
    14

    Fr

  • GSP–ONT, 08/15/26 – 08/22/26: From $483
    15

    Sa

  • GSP–ONT, 08/16/26 – 08/23/26: From $572
    16

    Su

  • GSP–ONT, 08/17/26 – 08/24/26: From $515
    17

    Mo

  • GSP–ONT, 08/18/26 – 08/25/26: From $483
    18

    Tu

  • GSP–ONT, 08/19/26 – 08/26/26: From $369
    19

    We

  • GSP–ONT, 08/20/26 – 08/27/26: From $369
    20

    Th

  • GSP–ONT, 08/21/26 – 08/28/26: From $433
    21

    Fr

  • GSP–ONT, 08/22/26 – 08/29/26: From $369
    22

    Sa

  • GSP–ONT, 08/23/26 – 08/30/26: From $512
    23

    Su

  • GSP–ONT, 08/24/26 – 08/31/26: From $401
    24

    Mo

  • GSP–ONT, 08/25/26 – 09/01/26: From $369
    25

    Tu

  • GSP–ONT, 08/26/26 – 09/02/26: From $401
    26

    We

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    27

    Th

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    28

    Fr

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    29

    Sa

    • range$369-$1,052

    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 Greenville to Ontario flights

    $
    keyboard_arrow_down

    Greenville (GSP)to

    Ontario (ONT)
    10/10/26 - 10/17/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    10/14/26 - 10/21/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    09/08/26 - 09/15/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    08/22/26 - 08/29/26

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 hours ago

    Greenville (GSP)to

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

    Round trip

    Economy

    from
    $369Fare subject to changes
    Updated: 17 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 Greenville to Ontario

    Looking for lower fares on your trip from Greenville 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

    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 Greenville to Ontario