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Cheap Flight Deals from Boston to San Francisco

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Round TripOne Way
MHT Manchester
SFO San Francisco
From $223.24
Feb 11, 2026 - Feb 18, 2026
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BOS Boston
SFO San Francisco
From $228.84
Jan 22, 2026 - Jan 25, 2026
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BOS Boston
OAK Oakland
From $279.82
Jan 28, 2026 - Feb 4, 2026
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*All fares above were last found on:
Fares are one way/round trip. Fares incl. all fuel surcharges, taxes & fees and our service fees. Displayed fares are subject to change and cannot be guaranteed at the time of booking. See all booking terms and conditions.

When’s a good time to book a flight from Boston to San Francisco?

What’s the cheapest day of the week to fly from Boston to San Francisco?‡

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What is the cheapest month to fly from Boston to San Francisco?‡

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‡This information is based on historical data from the last 365 days.

Finding Affordable Flights from Boston to San Francisco
  • Plan Ahead - One of the keys to securing cheap flights from Boston to San Francisco is to plan your trip well in advance. Airlines often offer lower prices for those who book tickets months ahead. Keep an eye on special promotions and sales events, which can yield significant savings.
  • Flexibility is Key - Being flexible with your travel dates can also lead to substantial cost savings. Consider flying during off-peak seasons or on weekdays when prices tend to be lower.
  • Set Price Alerts - To keep tabs on flight prices, consider setting up fare alerts. These alerts will notify you when fares from Boston to San Francisco drop, giving you the opportunity to grab cheap deals.
  • Consider Nearby Airports - If San Francisco has multiple airports, check the prices at each one. Sometimes, flying into a nearby airport and then taking a short train or bus ride to your destination can be a much cheaper option.
  • Bundle and Save - Booking your flight and accommodation together as a package can often result in significant savings. CheapOair offers these bundled deals, so make sure to explore this option.

When is the Cheapest Time to Book Flights from Boston to San Francisco?

‡

Got flexible travel dates? Use our flight data from the past year to discover ideal times to fly from Boston to San Francisco. Find out which months and days typically offer lower fares and score our best savings.

CheapOair provides the predicted prices for one-way trips or round-trips with a duration of 7 days for domestic and 14 days for international trips based on historical data and available flight information. Graphs are estimates only. Prices are subject to change and can't be guaranteed until ticketed.
Estimated price for
Round-trip

‡Graphs are estimates only. Based on historical data and available flight information. Prices are subject to change and cannot be guaranteed until ticketed.

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Boston to San Francisco Flight Route Information

Travel Distance:2,700 Miles
Airlines Flying This Route: United Airlines, JetBlue Airways, Alaska Airlines
Weekly Flights:42
Avg. Flight Duration:06.30 Hours

Insights About Flying from Boston to San Francisco

Q. Which is the high season to travel from Boston to San Francisco?

A. The month of August is considered the high season for flying from BOS to SFO. Traveling during the high season can affect ticket prices and availability, making this data crucial for trip planning.

Q. How many direct flights are available from BOS to SFO?

A. There are a total of 171 direct flights from Boston to San Francisco. For travelers seeking convenience and shorter travel times, this data is important when choosing flight options.

Q. Which is the low season to travel from Boston to San Francisco?

A. April is considered the low season for traveling from Boston to San Francisco, California. Travelers looking for cost-effective options and fewer crowds may consider traveling during this period.

Q. How many daily flights are there between Boston to San Francisco?

A. There are as many as 5 daily flights available for travelers between BOS to SFO. This data offers flexibility in choosing departure times that best suit your schedule.

Q. Which is the busiest day for passengers flying between Boston to San Francisco?

A. Monday are the busiest days for passengers flying between Boston to San Francisco. Knowing the peak travel day can help you plan your trip to avoid overcrowded flights or airports.

Q. At what time does the last flight depart to San Francisco?

A. The last flight to San Francisco typically departs between 9:00PM - 10:00PM. Travelers who prefer late-night departures will find this information valuable for planning their journey.

Q. What percentage of travelers spent an average of 3 days in San Francisco, California?

A. Approximately 35.56% of travelers spent an average of 3 days exploring San Francisco. This information can assist in planning the duration of your stay in San Francisco

Q. What percentage of BOS to SFO flyers traveled with kids under 14?

A. About 5% of passengers on flights from Boston to San Francisco were accompanied by children under the age of 14. This information is useful if you're planning a family trip and want to know how common it is to travel with young children on this route.

Q. What percentage of Boston to San Francisco travelers were over 60 years old?

A. A notable 17% of travelers were aged 60 or older. This statistic provides insights for senior travelers or those seeking a mature travel demographic.

Q. What percentage of BOS to SFO travelers were millennials?

A. Millennials make up a significant portion of travelers on this route, accounting for 36% of all passengers. If you're a millennial looking to connect with like-minded travelers, this statistic might interest you.

Q. What percentage of Boston to San Francisco travelers were female?

A. Almost half of the passengers, approximately 53% were female. Knowing the gender distribution can be useful for solo female travelers or those interested in gender-related travel insights.

Q. What percent of Boston to San Francisco travellers booked first or business class?

A. 8% of travelers booked first or business class on this route.

Q. At what time the earliest flight departs from Boston?

A. The earliest flight departs at 6:00AM - 7:00AM.

Q. On which days one can have the most flight options in San Francisco?

A. Monday offer the most flight options in San Francisco.

§ All flight facts are based on last 3 months' data except the highest and lowest booking months that are based on last 3 months' data.

Cheap Flights from Boston to San Francisco

Looking for flights from Boston (BOS) to San Francisco (SFO)? Find affordable air travel deals on CheapOair and save big on air tickets online. San Francisco is often known as the most European of all American cities, because of the amicable attitude of its people. A visit to the city may make you think that the buoyant air has a lot to do with the clement foggy weather. A decent traffic allows you to get around to the city�s top attractions as well as the lesser known ones. Few of the San Francisco attractions that you must see include the golden Gate Bridge, Presidio, a beautiful former military post, Transamerica Pyramid, a prominent building in the city skyline, Alamo Square Park, home to many pretty Victorian houses, the infamous Alcatraz Prison and Mission Dolores Church, the oldest structure in the city. To reach San Francisco, SFO from Boston, BOS you can choose from the top airlines, JetBlue Airways, United Airlines and US Airways for a comfortable and convenient journey. The average time taken by a flight to cover the distance of 2704 miles between the two cities is about 6 hours and 30 minutes.
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