American Airlines flights from Greenville to Ontario

Recent searches for flights from Greenville to Ontario

Sep 2026
From$503*
Updated: 12 hours ago
Round tripIEconomy
Oct 2026
From$305*
Updated: 12 hours ago
Round tripIEconomy
Nov 2026
From$305*
Updated: 12 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $391
cmp-daily-histogram-bars-legend-max-price-aria-label $1.4K
Displaying fares for September-2026
  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    15

    Tu

    SEP

  • GSP–ONT, 09/16/26 – 09/23/26: From $1,067
    16

    We

  • GSP–ONT, 09/17/26 – 09/24/26: From $1,077
    17

    Th

  • GSP–ONT, 09/18/26 – 09/25/26: From $1,077
    18

    Fr

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    19

    Sa

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    20

    Su

  • GSP–ONT, 09/21/26 – 09/28/26: From $1,354
    21

    Mo

  • GSP–ONT, 09/22/26 – 09/29/26: From $862
    22

    Tu

  • GSP–ONT, 09/23/26 – 09/30/26: From $842
    23

    We

  • GSP–ONT, 09/24/26 – 10/01/26: From $1,037
    24

    Th

  • GSP–ONT, 09/25/26 – 10/02/26: From $903
    25

    Fr

  • GSP–ONT, 09/26/26 – 10/03/26: From $842
    26

    Sa

  • GSP–ONT, 09/27/26 – 10/04/26: From $903
    27

    Su

  • GSP–ONT, 09/28/26 – 10/05/26: From $862
    28

    Mo

  • GSP–ONT, 09/29/26 – 10/06/26: From $503
    29

    Tu

  • GSP–ONT, 09/30/26 – 10/06/26: From $504
    30

    We

  • GSP–ONT, 10/01/26 – 10/07/26: From $582
    01

    Th

    OCT

  • GSP–ONT, 10/02/26 – 10/09/26: From $504
    02

    Fr

  • GSP–ONT, 10/03/26 – 10/10/26: From $532
    03

    Sa

  • GSP–ONT, 10/04/26 – 10/11/26: From $788
    04

    Su

  • GSP–ONT, 10/05/26 – 10/12/26: From $474
    05

    Mo

  • GSP–ONT, 10/06/26 – 10/13/26: From $402
    06

    Tu

  • GSP–ONT, 10/07/26 – 10/14/26: From $426
    07

    We

  • GSP–ONT, 10/08/26 – 10/15/26: From $779
    08

    Th

  • GSP–ONT, 10/09/26 – 10/16/26: From $664
    09

    Fr

  • GSP–ONT, 10/10/26 – 10/17/26: From $391
    10

    Sa

  • GSP–ONT, 10/11/26 – 10/18/26: From $624
    11

    Su

  • GSP–ONT, 10/12/26 – 10/19/26: From $473
    12

    Mo

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    13

    Tu

  • GSP–ONT: cmp-view-offers-disclaimer. Find Offers
    14

    We

    • range$391-$1,354

    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)
    10/24/26 - 10/31/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    10/31/26 - 11/07/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    11/10/26 - 11/17/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    11/18/26 - 11/25/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    10/17/26 - 10/24/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

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

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    10/21/26 - 10/28/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 hours ago

    Greenville (GSP)to

    Ontario (ONT)
    12/05/26 - 12/12/26

    Round trip

    Economy

    from
    $305Fare subject to changes
    Updated: 12 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

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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 Greenville to Ontario