$119 Cheap Alaska Airlines flights Boston (BOS) to San Francisco (SFO)

Finding cheap one-way Alaska Airlines flights from BOS to SFO from $119 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Or check out our budget-friendly round-trip fares for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for return or one-way flights to San Francisco in February or April. You could find an affordable fare with Alaska Airlines during these off-peak times.

Begin your search one to three months ahead of your travel date to find cheap fares on Alaska Airlines flights from Logan Intl. Airport (BOS) to San Francisco Intl. Airport (SFO). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Enter your dates, hit search and select the “Nonstop” filter on Expedia to browse any direct flights from BOS to SFO with Alaska Airlines or other airlines.

To find the earliest departure from BOS to SFO with Alaska Airlines, sort your results by “Morning” and “Early Morning.” Choosing an early flight usually means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Alaska Airlines flights from Logan Intl. Airport (BOS) to San Francisco land at San Francisco Intl. Airport (SFO). This is the main gateway to this city.

Alaska Airlines makes traveling from BOS to SFO enjoyable with top-tier customer service and a rewarding loyalty program. You could even start collecting points with Mileage Plan. Be sure to sign up to Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee typically applies if you cancel or reschedule your flight more than 24 hours after confirmation. To secure plane tickets with more flexibility, select our “Changes included” or “No cancel fee” filter when you search for flights. For more details on canceling or changing your reservation, visit “Trips,” select your flight and tick “Manage Booking.”