Alaska Airlines Flights from Portland to Saint Louis

Lowest fares from Portland to Saint Louis

Jul 2026
From$274*
Seen: 17 hours ago
Flight Type One Way|Saver
Aug 2026
From$149*
Seen: 17 hours ago
Flight Type One Way|Saver
Sep 2026
From$149*
Seen: 17 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $409
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    • Range$189-$409

    *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 Portland to Saint Louis.*

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

    From

    $149

    Seen: 17 hours ago

    Portland (PDX)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 9, 2026

    From

    $149

    Seen: 17 hours ago

    Portland (PDX)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 16, 2026

    From

    $149

    Seen: 17 hours ago

    Portland (PDX)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 23, 2026

    From

    $149

    Seen: 17 hours ago

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

    From

    $149

    Seen: 17 hours ago

    Portland (PDX)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 1, 2026

    From

    $149

    Seen: 17 hours ago

    Portland (PDX)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 5, 2026

    From

    $149

    Seen: 17 hours ago

    Portland (PDX)Saint Louis (STL)One-way
    |
    Saver    		Depart: Sep 15, 2026

    From

    $149

    Seen: 17 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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