£103 Cheap Flights from Boston (BOS) to San Francisco (SFO)

View £103 flight on Tue, 25 Aug 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to San Francisco International Airport (SFO)

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Cheap Flights from Boston (BOS) to San Francisco (SFO)

Prices were available within the past 7 days and start at £103 for one-way flights and £212 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, 26 May - Tue, 2 Jun
BOS
Boston
SFO
San Francisco
£212 Return, found 1 hour ago
£212
Return
found 1 hour ago
Select JetBlue Airways flight, departing Tue, 26 May from Boston to San Francisco, returning Tue, 2 Jun, priced at £212 found 1 hour ago
JetBlue Airways
Sat, 23 May - Sat, 30 May
BOS
Boston
SFO
San Francisco
£219 Return, found 16 hours ago
£219
Return
found 16 hours ago
Select JetBlue Airways flight, departing Sat, 23 May from Boston to San Francisco, returning Sat, 30 May, priced at £219 found 16 hours ago
Alaska Airlines
Wed, 27 May - Tue, 2 Jun
BOS
Boston
SFO
San Francisco
£219 Return, found 1 day ago
£219
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 27 May from Boston to San Francisco, returning Tue, 2 Jun, priced at £219 found 1 day ago
Delta
Wed, 15 Jul - Tue, 25 Aug
BOS
Boston
SFO
San Francisco
£220 Return, found 16 hours ago
£220
Return
found 16 hours ago
Select Delta flight, departing Wed, 15 Jul from Boston to San Francisco, returning Tue, 25 Aug, priced at £220 found 16 hours ago
Alaska Airlines
Wed, 13 May - Tue, 19 May
BOS
Boston
SFO
San Francisco
£223 Return, found 1 day ago
£223
Return
found 1 day ago
Select Alaska Airlines flight, departing Wed, 13 May from Boston to San Francisco, returning Tue, 19 May, priced at £223 found 1 day ago
JetBlue Airways
Tue, 26 May - Tue, 2 Jun
BOS
Boston
SFO
San Francisco
£226 Return, found 1 hour ago
£226
Return
found 1 hour ago
Select JetBlue Airways flight, departing Tue, 26 May from Boston to San Francisco, returning Tue, 2 Jun, priced at £226 found 1 hour ago
JetBlue Airways
Fri, 17 Jul - Tue, 25 Aug
BOS
Boston
SFO
San Francisco
£227 Return, found 16 hours ago
£227
Return
found 16 hours ago
Select JetBlue Airways flight, departing Fri, 17 Jul from Boston to San Francisco, returning Tue, 25 Aug, priced at £227 found 16 hours ago
JetBlue Airways
Wed, 27 May - Tue, 2 Jun
BOS
Boston
SFO
San Francisco
£231 Return, found 1 day ago
£231
Return
found 1 day ago
Select JetBlue Airways flight, departing Wed, 27 May from Boston to San Francisco, returning Tue, 2 Jun, priced at £231 found 1 day ago
American Airlines
Wed, 27 May - Tue, 2 Jun
BOS
Boston
SFO
San Francisco
£233 Return, found 1 day ago
£233
Return
found 1 day ago
Select American Airlines flight, departing Wed, 27 May from Boston to San Francisco, returning Tue, 2 Jun, priced at £233 found 1 day ago
United
Wed, 27 May - Tue, 2 Jun
BOS
Boston
SFO
San Francisco
£301 Return, found 1 day ago
£301
Return
found 1 day ago
Select United flight, departing Wed, 27 May from Boston to San Francisco, returning Tue, 2 Jun, priced at £301 found 1 day ago

Alternative airports near San Francisco

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Norman Y. Mineta San Jose Intl. SJC. Average driving time to city centre is 50 minutes. Flights from £342
SJC
Norman Y. Mineta San Jose Intl.
Average driving time to city centre50 min
Flights from £342
Select flight to Oakland Intl. OAK. Average driving time to city centre is 26 minutes. Flights from £404
OAK
Oakland Intl.
Average driving time to city centre26 min
Flights from £404

Find the cheapest month to fly from Boston (BOS) to San Francisco (SFO)

April is typically the cheapest month to fly

From £144 - £324 per traveller.

Frequently asked questions

How much does a flight from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) cost?
One-way flights typically cost between £116 and £667 and return flights often range between £376 and £1,091. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
Which airlines fly direct from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
Enter BOS to SFO and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
To find a cheap flight from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The best airline to fly with from Boston, MA (BOS-Logan Intl.) (BOS) to San Francisco, CA (SFO-San Francisco Intl.) (SFO) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, B6 typically offers the lowest fares. DL offers the most daily flights from Boston, MA (BOS-Logan Intl.) (BOS) to San Francisco, CA (SFO-San Francisco Intl.) (SFO), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
There are approximately 18 nonstop flights per day from Boston Logan International (BOS) to San Francisco International (SFO). For even more choice, look at flights that include layovers, as there are around 146 connecting flights per day. Some common connection points include O'Hare International (ORD), Seattle - Tacoma International (SEA), and Baltimore Washington International Thurgood Marshall (BWI).
What is the earliest flight from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The earliest flight from Boston, MA (BOS-Logan Intl.) (BOS) to San Francisco, CA (SFO-San Francisco Intl.) (SFO) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in April. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
You'll typically find the most flights from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) on a Friday, with around 119 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, United Airlines, and Delta Air Lines. Flight schedules are consistent throughout the week.
What are the most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
The most popular departure times for flights from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) are in the early morning, from 6am to 9am. This accounts for around 33% of total traffic. Many major carriers, including American Airlines, United Airlines and Delta Air Lines, offer flights during this window. Many travelers prefer these times because they allow for an early arrival in San Francisco, giving you more time to settle in or start your day.
How long does it take to fly from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
A nonstop flight from BOS to SFO typically takes around 6 hours 50 minutes, covering approximately 2,698 miles. Connecting flights on this route usually add 2 hours 30 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
Select the "Business class" and "First class" filters when looking for BOS to SFO flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
A direct, return business class ticket from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) typically costs between £2,071 - £2,817. You may also be able to find a cheaper business class journey between Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) if you opt for a connecting flight.
How do I earn miles on a Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight with Expedia?
It's easy to earn miles on a Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Francisco from Logan Intl. (BOS)?
From Logan Intl. (BOS), you can fly directly into San Francisco Intl. (SFO) to reach San Francisco. Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Portland Intl. (PDX), Baltimore Washington Intl. Thurgood Marshall (BWI) before reaching San Francisco. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) at the last minute?
Typically, booking a last minute flight from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package?
Securing a Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.)?
If you booked your Boston, MA (BOS-Logan Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Logan Intl.
Destination airport
San Francisco Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, United
Return price
£212
Distance
4315 km
Average flight time
3 hours 40 mins

Book with confidence

Compare flights from Boston to San Francisco easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Boston to San Francisco. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to San Francisco Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Logan Intl. to San Francisco Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Logan Intl. (BOS) to San Francisco Intl. (SFO)

The easiest way to view the best deals on flights from Boston to San Francisco today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Logan Intl. to San Francisco Intl. start at just £212 and range up to £301.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Boston and San Francisco
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Boston to San Francisco flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Logan Intl. to San Francisco Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Boston to San Francisco easily and book with confidence

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*Available to Expedia members.