Alaska Airlines Flights from Seattle to Saint Louis

Lowest fares from Seattle to Saint Louis

May 2026
From$229*
Seen: 21 hours ago
Flight Type One Way|Saver
Jun 2026
From$159*
Seen: 21 hours ago
Flight Type One Way|Saver
Jul 2026
From$209*
Seen: 21 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $159
cmp-daily-histogram-bars-legend-max-price-aria-label $394
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    • Range$159-$394

    *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 Seattle to Saint Louis.*

    $
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    One-way low-fare flights Seattle to Saint Louis.*
    From
    To
    Fare Type
    Dates
    Price
    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jun 2, 2026

    From

    $159

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jun 3, 2026

    From

    $159

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Jun 6, 2026

    From

    $169

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Aug 28, 2026

    From

    $189

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 17, 2026

    From

    $189

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 24, 2026

    From

    $189

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 26, 2026

    From

    $189

    Seen: 21 hours ago

    Seattle (SEA)Saint Louis (STL)One-way
    |
    Saver    		Depart: Nov 6, 2026

    From

    $189

    Seen: 21 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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