Flights from Boston (BOS) to San Francisco (SFO) on Alaska Airlines

Lowest fares from Boston to San Francisco

Nov 2026
From$274*
Seen: 18 hours ago
Flight Type One Way|Saver
Dec 2026
From$154*
Seen: 18 hours ago
Flight Type One Way|Saver
Jan 2027
From$144*
Seen: 18 hours ago
Flight Type One Way|Saver
cmp-daily-histogram-bars-legend-min-price-aria-label $154
cmp-daily-histogram-bars-legend-max-price-aria-label $917
Displaying fares for November-2026
  • BOS–SFO, Nov 11, 2026: From $324
    11

    We

    NOV

  • BOS–SFO, Nov 12, 2026: From $324
    12

    Th

  • BOS–SFO, Nov 13, 2026: From $324
    13

    Fr

  • BOS–SFO, Nov 14, 2026: From $324
    14

    Sa

  • BOS–SFO, Nov 15, 2026: From $539
    15

    Su

  • BOS–SFO, Nov 16, 2026: From $324
    16

    Mo

  • BOS–SFO, Nov 17, 2026: From $274
    17

    Tu

  • BOS–SFO, Nov 18, 2026: From $274
    18

    We

  • BOS–SFO, Nov 19, 2026: From $274
    19

    Th

  • BOS–SFO, Nov 20, 2026: From $304
    20

    Fr

  • BOS–SFO, Nov 21, 2026: From $389
    21

    Sa

  • BOS–SFO, Nov 22, 2026: From $419
    22

    Su

  • BOS–SFO, Nov 23, 2026: From $349
    23

    Mo

  • BOS–SFO, Nov 24, 2026: From $406
    24

    Tu

  • BOS–SFO, Nov 25, 2026: From $495
    25

    We

  • BOS–SFO, Nov 26, 2026: From $610
    26

    Th

  • BOS–SFO, Nov 27, 2026: From $539
    27

    Fr

  • BOS–SFO, Nov 28, 2026: From $820
    28

    Sa

  • BOS–SFO, Nov 29, 2026: From $917
    29

    Su

  • BOS–SFO, Nov 30, 2026: From $720
    30

    Mo

  • BOS–SFO, Dec 1, 2026: From $455
    01

    Tu

    DEC

  • BOS–SFO, Dec 2, 2026: From $154
    02

    We

  • BOS–SFO, Dec 3, 2026: From $229
    03

    Th

  • BOS–SFO, Dec 4, 2026: From $229
    04

    Fr

  • BOS–SFO, Dec 5, 2026: From $229
    05

    Sa

  • BOS–SFO, Dec 6, 2026: From $284
    06

    Su

  • BOS–SFO, Dec 7, 2026: From $154
    07

    Mo

  • BOS–SFO, Dec 8, 2026: From $154
    08

    Tu

  • BOS–SFO, Dec 9, 2026: From $154
    09

    We

  • BOS–SFO, Dec 10, 2026: From $154
    10

    Th

    • Range$154-$917

    *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: Feb 9, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 13, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 20, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 21, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 24, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 27, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 28, 2027

    From

    $144

    Seen: 18 hours ago

    Boston (BOS)San Francisco (SFO)One-way
    |
    Saver    		Depart: Jan 29, 2027

    From

    $144

    Seen: 18 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.

    Frequently Asked Questions on flights from Boston (BOS) to San Francisco (SFO)

    When is the best time to book a flight from Boston to San Francisco?

    Want to find the lowest fares by day and time flying from Boston to San Francisco on Alaska Airlines or Hawaiian Airlines? Check out our flight search widget.

    Can I earn points on my flight to San Francisco?

    Yes, with Atmosâ„¢ Rewards you can earn points on flights to 1000+ destinations worldwide through the growing network of Alaska and Hawaiian Airlines. Not an Atmosâ„¢ Rewards member yet? Learn more and join today.

    Can I rent a car when I arrive at San Francisco International Airport?

    Yes, you can rent a car at San Francisco International Airport. Check availability and book now

    Where can I find the status of my flight to San Francisco?

    You can check the status of your upcoming Alaska Airlines flight on our flight schedule page.

    Where can I find answers to questions about flying with Alaska Airlines?

    Visit the Alaska Airlines Help Center to quickly browse our help pages by category to find the information you need.

    Can I change or cancel my Alaska Airlines flight to San Francisco?

    Yes, you can review, modify, or cancel a reservation from our Manage Your Reservation tool. You can learn more about our policy for changing or cancelling a reservation here. 

    Looking for more? See other routes