Alaska Airlines Flights from Boston to San Diego

Lowest fares from Boston to San Diego

Jul 2026
From$291*
Seen: 19 hours ago
Flight Type One Way|Saver
Aug 2026
From$137*
Seen: 19 hours ago
Flight Type One Way|Saver
Sep 2026
From$129*
Seen: 19 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $167
cmp-daily-histogram-bars-legend-max-price-aria-label $614
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    • Range$167-$614

    *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: Sep 5, 2026

    From

    $129

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 6, 2026

    From

    $129

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Oct 30, 2026

    From

    $129

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Nov 26, 2026

    From

    $129

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Aug 28, 2026

    From

    $137

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 1, 2026

    From

    $137

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 10, 2026

    From

    $137

    Seen: 19 hours ago

    Boston (BOS)San Diego (SAN)One-way
    |
    Saver    		Depart: Sep 11, 2026

    From

    $129

    Seen: 1 hour 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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