Alaska Airlines Flights from Portland to Idaho Falls

Lowest fares from Portland to Idaho Falls

Apr 2026
From$484*
Seen: 12 hours ago
Flight Type One Way|Saver
May 2026
From$99*
Seen: 1 hour ago
Flight Type One Way|Saver
Jun 2026
From$189*
Seen: 3 hours ago
Flight Type One Way|Saver
$339
Displaying fares for April-2026
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    • Range$339-$484

    *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 Idaho Falls.*

    $
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    One-way low-fare flights Portland to Idaho Falls.*
    From
    To
    Fare Type
    Dates
    Price
    Portland (PDX)Idaho Falls (IDA)One-way
    |
    Saver    		Depart: May 26, 2026

    From

    $189

    Seen: 18 hours ago

    Portland (PDX)Idaho Falls (IDA)One-way
    |
    Saver    		Depart: Apr 17, 2026

    From

    $484

    Seen: 12 hours ago

    Portland (PDX)Idaho Falls (IDA)One-way
    |
    Saver    		Depart: May 30, 2026

    From

    $99

    Seen: 1 hour ago

    Portland (PDX)Idaho Falls (IDA)One-way
    |
    Saver    		Depart: Jun 23, 2026

    From

    $189

    Seen: 3 hours ago

    Portland (PDX)Idaho Falls (IDA)One-way
    |
    Saver    		Depart: May 4, 2026

    From

    $339

    Seen: 3 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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