Alaska Airlines Flights from San Francisco to Boston

Lowest fares from San Francisco to Boston

Aug 2026
From$194*
Seen: 13 hours ago
Flight Type One Way|Saver
Sep 2026
From$180*
Seen: 13 hours ago
Flight Type One Way|Saver
Oct 2026
From$169*
Seen: 13 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $180
cmp-daily-histogram-bars-legend-max-price-aria-label $478
Displaying fares for August-2026
  • SFO–BOS, Aug 12, 2026: From $194
    12

    We

    AUG

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

    Th

  • SFO–BOS, Aug 14, 2026: From $374
    14

    Fr

  • SFO–BOS, Aug 15, 2026: From $282
    15

    Sa

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

    Su

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

    Mo

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

    Tu

  • SFO–BOS, Aug 19, 2026: From $369
    19

    We

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

    Th

  • SFO–BOS, Aug 21, 2026: From $329
    21

    Fr

  • SFO–BOS, Aug 22, 2026: From $478
    22

    Sa

  • SFO–BOS, Aug 23, 2026: From $284
    23

    Su

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

    Mo

  • SFO–BOS, Aug 25, 2026: From $334
    25

    Tu

  • SFO–BOS, Aug 26, 2026: From $268
    26

    We

  • SFO–BOS, Aug 27, 2026: From $268
    27

    Th

  • SFO–BOS, Aug 28, 2026: From $199
    28

    Fr

  • SFO–BOS, Aug 29, 2026: From $268
    29

    Sa

  • SFO–BOS, Aug 30, 2026: From $249
    30

    Su

  • SFO–BOS, Aug 31, 2026: From $199
    31

    Mo

  • SFO–BOS, Sep 1, 2026: From $268
    01

    Tu

    SEP

  • SFO–BOS, Sep 2, 2026: From $397
    02

    We

  • SFO–BOS, Sep 3, 2026: From $335
    03

    Th

  • SFO–BOS, Sep 4, 2026: From $249
    04

    Fr

  • SFO–BOS, Sep 5, 2026: From $209
    05

    Sa

  • SFO–BOS, Sep 6, 2026: From $209
    06

    Su

  • SFO–BOS, Sep 7, 2026: From $334
    07

    Mo

  • SFO–BOS, Sep 8, 2026: From $268
    08

    Tu

  • SFO–BOS, Sep 9, 2026: From $376
    09

    We

  • SFO–BOS, Sep 10, 2026: From $199
    10

    Th

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

    Fr

    • Range$180-$478

    *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 San Francisco to Boston.*

    $
    keyboard_arrow_down
    One-way low-fare flights San Francisco to Boston.*
    From
    To
    Fare Type
    Dates
    Price
    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 27, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 17, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 20, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 24, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 3, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 6, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 10, 2026

    From

    $169

    Seen: 13 hours ago

    San Francisco (SFO)Boston (BOS)One-way
    |
    Saver    		Depart: Oct 21, 2026

    From

    $169

    Seen: 13 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.

    Explore Alaska Airlines's Flights to Top-Pick Destinations