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

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines return flights from $237 from SFO to BOS. Affordable one-way fares from $119 are also available.**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.

January is one of the least expensive months to jet off to Boston with United Airlines. You could also find great deals on one-way and return tickets in February.

Begin your search one to three months before your departure to score cheaper fares on United Airlines flights from San Francisco Intl. Airport (SFO) to Logan Intl. Airport (BOS). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to 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 right, and you can enjoy significant savings on domestic journeys.*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.

Easily travel from San Francisco Intl. Airport (SFO) to Logan Intl. Airport (BOS) on one of United Airlines’s 28 direct weekly flights. Make use of our “Nonstop” and “Airline” filters to find the United Airlines flight that’ll land at BOS at your preferred time.

It takes around 5h 44m to fly nonstop from San Francisco Intl. Airport (SFO) to Logan Intl. Airport (BOS) with United Airlines.

If you’re looking for flexibility, Friday offers the most choice for United Airlines flights from San Francisco Intl. Airport (SFO) to Logan Intl. Airport (BOS). You can select from 4 different departures.

The first flight from SFO to BOS with United Airlines departs at 8:25AM UTC-8. You’ll touch down at 5:11PM UTC-5. The final United Airlines flight of the day takes off at 11:10PM UTC-8 and arrives at 7:53AM UTC-5. With around 20% fewer cancellations for morning and mid-morning departures, setting off early is generally the smartest choice.**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.

Jump on a United Airlines flight from San Francisco Intl. Airport (SFO) to Boston, and you’ll probably touch down at Logan Intl. Airport (BOS). This is the airline’s main hub in this city.

Depart from SFO to BOS with United Airlines and look forward to a range of perks including a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you may also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be seated on a Boeing 757-200 or a Boeing 737 MAX 9 when flying United Airlines from San Francisco Intl. Airport (SFO) to Logan Intl. Airport (BOS). However, keep in mind that a different aircraft may be assigned depending on operational demands.

Depending on the type of ticket you purchased, a fee generally applies if you change or cancel your booking more than 24 hours after it has been confirmed. To find plane tickets with more flexibility, select our “Changes included” and “No cancel fee” boxes when searching for flights. To learn more about modifying or canceling your reservation, head to “Trips,” select your flight and tick “Manage Booking.”