Alaska Airlines Flights from Seattle to Ontario

DPA Name: DPA QA Test - Details / example to Los Angeles/LAX

$

Seattle (SEA)to

Los Angeles (LAX)
Depart: May 5, 2026
From
$79
Seen: 2 hours ago
One-way
Economy
Cheap flights from Seattle to Ontario

Lowest fares from Seattle to Ontario

Mar 2026
From$89*
Seen: 2 hours ago
Flight Type One Way|Economy Class
Apr 2026
From$89*
Seen: 2 hours ago
Flight Type One Way|Economy Class
May 2026
From$89*
Seen: 2 hours ago
Flight Type One Way|Economy Class
$89
$299
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    • Range$89-$299

    *Fares and availability are based on round trip searches for 1 passenger (1 adult) in Economy class in the last 48 hours. Fares are inclusive of tax and surcharges, and subject to availability. link.

    One-way low-fare flights Seattle to Ontario.*

    $
    One-way low-fare flights Seattle to Ontario.*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Ontario (ONT)One-way
    |
    Economy    		Depart: Nov 14, 2026

    From

    $159

    Seen: 21 hours ago

    *Prices have been available for one-way trips within the last 48 hours and may not be currently available. Fares listed may be Saver fares which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.