American Airlines flights from Grand Junction to Ontario

Recent searches for flights from Grand Junction to Ontario

Aug 2026
From$334*
Updated: 1 hour ago
Round tripIEconomy
Sep 2026
From$319*
Updated: 1 hour ago
Round tripIEconomy
Oct 2026
From$319*
Updated: 1 hour ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $319
cmp-daily-histogram-bars-legend-max-price-aria-label $645
Displaying fares for August-2026
  • GJT–ONT, 08/16/26 – 08/23/26: From $437
    16

    Su

    AUG

  • GJT–ONT, 08/17/26 – 08/24/26: From $487
    17

    Mo

  • GJT–ONT, 08/18/26 – 08/25/26: From $393
    18

    Tu

  • GJT–ONT, 08/19/26 – 08/26/26: From $393
    19

    We

  • GJT–ONT, 08/20/26 – 08/27/26: From $437
    20

    Th

  • GJT–ONT, 08/21/26 – 08/28/26: From $437
    21

    Fr

  • GJT–ONT, 08/22/26 – 08/29/26: From $393
    22

    Sa

  • GJT–ONT, 08/23/26 – 08/30/26: From $379
    23

    Su

  • GJT–ONT, 08/24/26 – 08/31/26: From $407
    24

    Mo

  • GJT–ONT, 08/25/26 – 09/01/26: From $371
    25

    Tu

  • GJT–ONT, 08/26/26 – 09/02/26: From $371
    26

    We

  • GJT–ONT, 08/27/26 – 09/03/26: From $645
    27

    Th

  • GJT–ONT, 08/28/26 – 09/04/26: From $642
    28

    Fr

  • GJT–ONT, 08/29/26 – 09/05/26: From $371
    29

    Sa

  • GJT–ONT, 08/30/26 – 09/06/26: From $334
    30

    Su

  • GJT–ONT, 08/31/26 – 09/07/26: From $437
    31

    Mo

  • GJT–ONT, 09/01/26 – 09/08/26: From $334
    01

    Tu

    SEP

  • GJT–ONT, 09/02/26 – 09/09/26: From $334
    02

    We

  • GJT–ONT, 09/03/26 – 09/10/26: From $334
    03

    Th

  • GJT–ONT, 09/04/26 – 09/11/26: From $392
    04

    Fr

  • GJT–ONT, 09/05/26 – 09/12/26: From $334
    05

    Sa

  • GJT–ONT, 09/06/26 – 09/13/26: From $364
    06

    Su

  • GJT–ONT, 09/07/26 – 09/14/26: From $620
    07

    Mo

  • GJT–ONT, 09/08/26 – 09/15/26: From $436
    08

    Tu

  • GJT–ONT, 09/09/26 – 09/16/26: From $319
    09

    We

  • GJT–ONT, 09/10/26 – 09/17/26: From $420
    10

    Th

  • GJT–ONT, 09/11/26 – 09/18/26: From $392
    11

    Fr

  • GJT–ONT, 09/12/26 – 09/19/26: From $319
    12

    Sa

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

    Su

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

    Mo

  • GJT–ONT, 09/15/26 – 09/22/26: From $319
    15

    Tu

    • range$319-$645

    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 Grand Junction to Ontario flights

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    Grand Junction (GJT)to

    Ontario (ONT)
    10/16/26 - 10/23/26

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

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

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

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

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

    Ontario (ONT)
    09/16/26 - 09/23/26

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

    Ontario (ONT)
    09/19/26 - 09/26/26

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

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

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

    Ontario (ONT)
    11/01/26 - 11/08/26

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour ago

    Grand Junction (GJT)to

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

    Round trip

    Economy

    from
    $319Fare subject to changes
    Updated: 1 hour 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 Grand Junction to Ontario

    Looking for lower fares on your trip from Grand Junction 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 Grand Junction to Ontario