American Airlines flights from Washington, D.C. to Ontario

Recent searches for flights from Washington, D.C. to Ontario

Sep 2026
From$351*
Updated: 6 hours ago
Round tripIEconomy
Oct 2026
From$351*
Updated: 15 hours ago
Round tripIEconomy
Nov 2026
From$351*
Updated: 15 hours ago
Round tripIEconomy
cmp-daily-histogram-bars-legend-min-price-aria-label $351
cmp-daily-histogram-bars-legend-max-price-aria-label $874
Displaying fares for September-2026
  • WAS–ONT, 09/09/26 – 09/16/26: From $493
    09

    We

    SEP

  • WAS–ONT, 09/10/26 – 09/17/26: From $666
    10

    Th

  • WAS–ONT, 09/11/26 – 09/18/26: From $666
    11

    Fr

  • WAS–ONT, 09/12/26 – 09/19/26: From $545
    12

    Sa

  • WAS–ONT, 09/13/26 – 09/20/26: From $743
    13

    Su

  • DCA–ONT, 09/14/26 – 09/16/26: From $874
    14

    Mo

  • WAS–ONT, 09/15/26 – 09/22/26: From $515
    15

    Tu

  • WAS–ONT, 09/16/26 – 09/23/26: From $493
    16

    We

  • WAS–ONT, 09/17/26 – 09/24/26: From $678
    17

    Th

  • WAS–ONT, 09/18/26 – 09/25/26: From $755
    18

    Fr

  • WAS–ONT, 09/19/26 – 09/26/26: From $540
    19

    Sa

  • WAS–ONT, 09/20/26 – 09/27/26: From $678
    20

    Su

  • WAS–ONT, 09/21/26 – 09/28/26: From $709
    21

    Mo

  • IAD–ONT, 09/22/26 – 09/29/26: From $459
    22

    Tu

  • WAS–ONT, 09/23/26 – 09/30/26: From $459
    23

    We

  • WAS–ONT, 09/24/26 – 10/01/26: From $560
    24

    Th

  • WAS–ONT, 09/25/26 – 10/02/26: From $528
    25

    Fr

  • WAS–ONT, 09/26/26 – 10/03/26: From $459
    26

    Sa

  • WAS–ONT, 09/27/26 – 10/04/26: From $603
    27

    Su

  • DCA–ONT, 09/28/26 – 10/05/26: From $513
    28

    Mo

  • DCA–ONT, 09/29/26 – 10/06/26: From $351
    29

    Tu

  • WAS–ONT, 09/30/26 – 10/07/26: From $364
    30

    We

  • WAS–ONT, 10/01/26 – 10/08/26: From $497
    01

    Th

    OCT

  • WAS–ONT, 10/02/26 – 10/09/26: From $402
    02

    Fr

  • WAS–ONT, 10/03/26 – 10/10/26: From $351
    03

    Sa

  • WAS–ONT, 10/04/26 – 10/11/26: From $496
    04

    Su

  • WAS–ONT, 10/05/26 – 10/12/26: From $351
    05

    Mo

  • WAS–ONT: cmp-view-offers-disclaimer. Find Offers
    06

    Tu

  • DCA–ONT, 10/07/26 – 10/12/26: From $351
    07

    We

  • DCA–ONT, 10/08/26 – 10/12/26: From $436
    08

    Th

    • range$351-$874

    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 Washington, D.C. to Ontario flights

    $
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    Washington, D.C. (WAS)to

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

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

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

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

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

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

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

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

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

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

    Ontario (ONT)
    10/28/26 - 11/04/26

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

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

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 hours ago

    Washington, D.C. (WAS)to

    Ontario (ONT)
    12/01/26 - 12/08/26

    Round trip

    Economy

    from
    $351Fare subject to changes
    Updated: 15 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 Washington, D.C. to Ontario

    Looking for lower fares on your trip from Washington, D.C. 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 Washington, D.C. to Ontario