Question 1

How popular is this Boston to San Francisco flight route?

Accepted Answer

Within the past month, 9 users have taken a look at flights from Boston Logan Intl to San Francisco.

Question 2

What are the cheapest airlines flying from Boston to San Francisco round-trip?

Accepted Answer

Flying on Southwest is currently your cheapest option to San Francisco, with prices starting at £184. Additional return tickets that might be worth considering are offered by JetBlue and Alaska Airlines, with the lowest prices starting at £187 and £188, respectively. You may be able to fly from Boston to San Francisco for 29% less than the average price by searching for these airlines.

Question 3

What are the cheapest airlines to fly from Boston to San Francisco one-way?

Accepted Answer

The cheapet airlines for a one-way flight from Boston to San Francisco are Alaska Airlines (£102), Hawaiian Airlines (£102), and JetBlue (£106).

Question 4

How far ahead should I book a flight from Boston to San Francisco?

Accepted Answer

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to San Francisco. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 5

What is the cheapest month to book a flight from Boston to San Francisco?

Accepted Answer

Currently, February is the cheapest month in which you can book a flight from Boston to San Francisco (average of £538). Flying from Boston to San Francisco in July is currently the most expensive (average of £803). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 6

What is the cheapest day to fly from Boston to San Francisco?

Accepted Answer

Travellers seeking maximum savings on their Boston to San Francisco flight should consider departing on Friday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 7

Weekly flight availability from Boston to San Francisco

Accepted Answer

The most flights from BOS to SFO are scheduled on a Thursday (62 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (43 on average).

Question 8

E

Accepted Answer

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Question 9

E

Accepted Answer

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Question 10

What are the cheapest flights from Boston to San Francisco?

Accepted Answer

On average you can expect to pay £527 for a flight from Boston to San Francisco. The cheapest flight overall is £120 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £155.

Question 11

What are the most reliable airlines from Boston to San Francisco?

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Francisco on time: Korean Air (100%), ANA (92%), Icelandair (91%).

Question 12

What is the cheapest day to fly round-trip from Boston to San Francisco?

Accepted Answer

Users have found that flying from Boston to San Francisco on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Question 13

How far in advance should I book a flight from Boston to San Francisco?

Accepted Answer

Travelers have found it’s best to book a flight 57 days in advance to save up to 85% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 57 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Boston to San Francisco 1-2 weeks in advance for as low as £296, or £394 for flights within the next 24 hours.

Question 14

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

Accepted Answer

September is one of the best times of the year to fly to San Francisco from Boston. Prices for September average £262 per person but you can even find prices for as low as £105. The most expensive prices can be found in the month of December. Opting for a September flight can save you 15% on your journey compared to booking in December

Question 15

What is the cheapest time of day to fly from BOS to SFO?

Accepted Answer

A simple way to save on the total cost of your ticket is to fly from Boston to San Francisco in the afternoon. If you’re flexible enough to do this you can expect to save up to 71% on your trip compared to booking a flight at midday.

Question 16

What airports do I use to fly from Boston to San Francisco?

Accepted Answer

You will need to book a flight from Boston Logan Intl to San Francisco if you want to fly from Boston to San Francisco. At least 2 different airlines have flights from Logan Intl (BOS) to San Francisco (SFO) on a regular basis. There are 55 flights to San Francisco from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SFO to be around 6h 29m.

Question 17

Can I find deals for flights from Boston to San Francisco that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Boston to San Francisco flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 18

How can I find direct flights from Boston to San Francisco?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Francisco.

Question 19

Can I find deals for business class flights from Boston to San Francisco?

Accepted Answer

Yes. Cheapflights offers flight deals from Boston to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 20

How does Cheapflights help users find flights from Boston to San Francisco?

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 21

Why should you use Cheapflights to find cheap flight tickets from Boston to San Francisco?

Accepted Answer

Cheapflights helps you find that perfect flight to San Francisco from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 22

Can Cheapflights find flights from Boston to San Francisco with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from Boston to San Francisco with no change fees.

Question 23

Can Cheapflights notify me if prices for flights from Boston to San Francisco become cheaper?

Accepted Answer

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Boston today and book when prices fit your budget.

Round-trip from	£184
One-way from	£102
Popular in	December
Cheapest in	September
Average price	£264
Good round-trip deal	£706 or less
Good one-way deal	£139 or less

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest£106	Average£190	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Alaska Airlines	Cheapest£163	Average£205	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights

Cheap flights from Boston to San Francisco from £102

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in September or January, booked 56 days in advance, depart on a Wednesday or Thursday and return on a Friday

Cheap flight deals from Boston to San Francisco

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Find flight deals from Boston to San Francisco

Cheapest flights from Boston to San FranciscoExplore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Best time to book a flight from Boston to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Boston with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Boston to San Francisco

How far ahead should I book a flight from Boston to San Francisco?

Use this chart to determine the optimal time to book a return flight from Boston to San Francisco. Price data was last updated on 27 June 2025.

What is the cheapest month to book a flight from Boston to San Francisco?

What is the cheapest time of day to fly from BOS to SFO?

Find hourly flight availability from Boston to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

Weekly flight availability from Boston to San Francisco

Explore weekly flight availability from Boston to San Francisco. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 July 2025.

How much does it cost for a return flight from Boston to San Francisco?

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with Alaska Airlines, Southwest, andDelta from Boston to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports do I use to fly from Boston to San Francisco?

How popular is this Boston to San Francisco flight route?

What are the cheapest airlines flying from Boston to San Francisco round-trip?

What are the cheapest airlines to fly from Boston to San Francisco one-way?

What are the most reliable airlines from Boston to San Francisco?

What are the cheapest flights from Boston to San Francisco?

Can I find deals for flights from Boston to San Francisco that include hotel bookings?

How can I find direct flights from Boston to San Francisco?

Can I find deals for business class flights from Boston to San Francisco?

What is the cheapest month to book a flight from Boston to San Francisco?

Travelling to a place near Boston?

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Alternative routes for Boston to San Francisco

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Top 2 airlines flying from Boston to San Francisco

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How does Cheapflights help users find flights from Boston to San Francisco?

Why should you use Cheapflights to find cheap flight tickets from Boston to San Francisco?

Can Cheapflights find flights from Boston to San Francisco with no change fees?

Can Cheapflights notify me if prices for flights from Boston to San Francisco become cheaper?

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Cheapest flights from Boston to San Francisco
Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.