Alaska Airlines Flights from Philadelphia to Seattle

Lowest fares from Philadelphia to Seattle

Jun 2026
From$195*
Seen: 5 hours ago
Flight Type One Way|Saver
Jul 2026
From$180*
Seen: 8 hours ago
Flight Type One Way|Saver
Aug 2026
From$175*
Seen: 8 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $180
cmp-daily-histogram-bars-legend-max-price-aria-label $339
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    • Range$180-$339

    *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 Philadelphia to Seattle.*

    $
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    One-way low-fare flights Philadelphia to Seattle.*
    From
    To
    Fare Type
    Dates
    Price
    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 21, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 23, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Sep 30, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 2, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 10, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 13, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 14, 2026

    From

    $175

    Seen: 8 hours ago

    Philadelphia (PHL)Seattle (SEA)One-way
    |
    Saver    		Depart: Oct 25, 2026

    From

    $175

    Seen: 8 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.

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