Alaska Airlines Flights from Boston to San Diego

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Lowest fares from Boston to San Diego

Jul 2025
From$149*
Seen: 22 hours ago
Flight Type One Way|Saver
$139
$409
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    • Range$139-$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 Boston to San Diego.*

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    One-way low-fare flights Boston to San Diego.*
    From
    To
    Fare Type
    Dates
    Price
    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Oct 22, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Nov 4, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Nov 12, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 9, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 10, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 13, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 30, 2025

    From

    $119

    Seen: 22 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Oct 8, 2025

    From

    $119

    Seen: 22 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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