Alaska Airlines Flights from Boston to San Francisco

Lowest fares from Boston to San Francisco

Aug 2026
From$194*
Seen: 11 hours ago
Flight Type One Way|Saver
Sep 2026
From$159*
Seen: 11 hours ago
Flight Type One Way|Saver
Oct 2026
From$159*
Seen: 11 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $169
cmp-daily-histogram-bars-legend-max-price-aria-label $444
Displaying fares for August-2026
  • BOS–SFO, Aug 12, 2026: From $219
    12

    We

    AUG

  • BOS–SFO, Aug 13, 2026: From $194
    13

    Th

  • BOS–SFO, Aug 14, 2026: From $194
    14

    Fr

  • BOS–SFO, Aug 15, 2026: From $334
    15

    Sa

  • BOS–SFO, Aug 16, 2026: From $329
    16

    Su

  • BOS–SFO, Aug 17, 2026: From $329
    17

    Mo

  • BOS–SFO, Aug 18, 2026: From $282
    18

    Tu

  • BOS–SFO, Aug 19, 2026: From $282
    19

    We

  • BOS–SFO, Aug 20, 2026: From $284
    20

    Th

  • BOS–SFO, Aug 21, 2026: From $284
    21

    Fr

  • BOS–SFO, Aug 22, 2026: From $282
    22

    Sa

  • BOS–SFO, Aug 23, 2026: From $334
    23

    Su

  • BOS–SFO, Aug 24, 2026: From $284
    24

    Mo

  • BOS–SFO, Aug 25, 2026: From $282
    25

    Tu

  • BOS–SFO, Aug 26, 2026: From $229
    26

    We

  • BOS–SFO, Aug 27, 2026: From $229
    27

    Th

  • BOS–SFO, Aug 28, 2026: From $229
    28

    Fr

  • BOS–SFO, Aug 29, 2026: From $229
    29

    Sa

  • BOS–SFO, Aug 30, 2026: From $334
    30

    Su

  • BOS–SFO, Aug 31, 2026: From $229
    31

    Mo

  • BOS–SFO, Sep 1, 2026: From $169
    01

    Tu

    SEP

  • BOS–SFO, Sep 2, 2026: From $180
    02

    We

  • BOS–SFO, Sep 3, 2026: From $170
    03

    Th

  • BOS–SFO, Sep 4, 2026: From $189
    04

    Fr

  • BOS–SFO, Sep 5, 2026: From $187
    05

    Sa

  • BOS–SFO, Sep 6, 2026: From $187
    06

    Su

  • BOS–SFO, Sep 7, 2026: From $444
    07

    Mo

  • BOS–SFO, Sep 8, 2026: From $283
    08

    Tu

  • BOS–SFO, Sep 9, 2026: From $214
    09

    We

  • BOS–SFO, Sep 10, 2026: From $180
    10

    Th

  • BOS–SFO, Sep 11, 2026: From $180
    11

    Fr

    • Range$169-$444

    *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 Francisco.*

    $
    keyboard_arrow_down
    One-way low-fare flights Boston to San Francisco.*
    From
    To
    Fare Type
    Dates
    Price
    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Oct 3, 2026

    From

    $159

    Seen: 11 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Sep 29, 2026

    From

    $159

    Seen: 11 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Sep 15, 2026

    From

    $159

    Seen: 11 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Sep 16, 2026

    From

    $159

    Seen: 11 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Sep 22, 2026

    From

    $159

    Seen: 11 hours ago

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

    From

    $169

    Seen: 11 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 7, 2027

    From

    $170

    Seen: 11 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 9, 2027

    From

    $170

    Seen: 11 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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