American Airlines flights from Monroe to Ontario

Recent searches for flights from Monroe to Ontario

Aug 2026
From$520*
Updated: 5 hours ago
Round tripIEconomy
Sep 2026
From$418*
Updated: 14 hours ago
Round tripIEconomy
Oct 2026
From$418*
Updated: 5 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $418
cmp-daily-histogram-bars-legend-max-price-aria-label $696
Displaying fares for August-2026
  • MLU–ONT, 08/23/26 – 08/30/26: From $650
    23

    Su

    AUG

  • MLU–ONT, 08/24/26 – 08/31/26: From $650
    24

    Mo

  • MLU–ONT, 08/25/26 – 09/01/26: From $520
    25

    Tu

  • MLU–ONT, 08/26/26 – 09/02/26: From $520
    26

    We

  • MLU–ONT, 08/27/26 – 09/03/26: From $650
    27

    Th

  • MLU–ONT, 08/28/26 – 09/04/26: From $650
    28

    Fr

  • MLU–ONT, 08/29/26 – 09/05/26: From $520
    29

    Sa

  • MLU–ONT, 08/30/26 – 09/06/26: From $650
    30

    Su

  • MLU–ONT, 08/31/26 – 09/07/26: From $696
    31

    Mo

  • MLU–ONT, 09/01/26 – 09/08/26: From $646
    01

    Tu

    SEP

  • MLU–ONT, 09/02/26 – 09/09/26: From $520
    02

    We

  • MLU–ONT, 09/03/26 – 09/10/26: From $650
    03

    Th

  • MLU–ONT, 09/04/26 – 09/11/26: From $650
    04

    Fr

  • MLU–ONT, 09/05/26 – 09/12/26: From $469
    05

    Sa

  • MLU–ONT, 09/06/26 – 09/13/26: From $579
    06

    Su

  • MLU–ONT, 09/07/26 – 09/14/26: From $650
    07

    Mo

  • MLU–ONT, 09/08/26 – 09/15/26: From $520
    08

    Tu

  • MLU–ONT, 09/09/26 – 09/16/26: From $469
    09

    We

  • MLU–ONT, 09/10/26 – 09/17/26: From $579
    10

    Th

  • MLU–ONT, 09/11/26 – 09/18/26: From $579
    11

    Fr

  • MLU–ONT, 09/12/26 – 09/19/26: From $469
    12

    Sa

  • MLU–ONT, 09/13/26 – 09/20/26: From $696
    13

    Su

  • MLU–ONT, 09/14/26 – 09/21/26: From $650
    14

    Mo

  • MLU–ONT, 09/15/26 – 09/22/26: From $469
    15

    Tu

  • MLU–ONT, 09/16/26 – 09/23/26: From $469
    16

    We

  • MLU–ONT, 09/17/26 – 09/24/26: From $629
    17

    Th

  • MLU–ONT, 09/18/26 – 09/25/26: From $629
    18

    Fr

  • MLU–ONT, 09/19/26 – 09/26/26: From $469
    19

    Sa

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

    Su

  • MLU–ONT: cmp-view-offers-disclaimer. Find Offers
    21

    Mo

  • MLU–ONT, 09/22/26 – 09/29/26: From $418
    22

    Tu

    • range$418-$696

    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 Monroe to Ontario flights

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    keyboard_arrow_down

    Monroe (MLU)to

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

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

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

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

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

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

    Ontario (ONT)
    09/26/26 - 10/03/26

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

    Ontario (ONT)
    11/04/26 - 11/11/26

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

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

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

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

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 hours ago

    Monroe (MLU)to

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

    Round trip

    Economy

    from
    $418Fare subject to changes
    Updated: 5 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 Monroe to Ontario

    Looking for lower fares on your trip from Monroe 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 Monroe to Ontario