Alaska Airlines Flights from Ontario to Washington, D.C.

Lowest fares from Ontario to Washington, D.C.

May 2026
From$182*
Seen: 20 hours ago
Flight Type One Way|Saver
Jun 2026
Try another month to see offers
Jul 2026
Try another month to see offers
cmp-daily-histogram-bars-legend-min-price-aria-label $182
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    • Range$182

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.

    One-way low-fare flights Ontario to Washington, D.C..*

    $
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    One-way low-fare flights Ontario to Washington, D.C..*
    From
    To
    Fare Type
    Dates
    Price
    Ontario (ONT)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: May 24, 2026

    From

    $182

    Seen: 20 hours ago

    Ontario (ONT)Washington, D.C. (IAD)One-way
    |
    Saver    		Depart: Oct 1, 2026

    From

    $602

    Seen: 22 hours ago

    *Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.