Question 1

How popular is this Boston to San Francisco flight route?

Accepted Answer

Flights from Boston Logan Intl to San Francisco have been viewed 36 times in the past calendar month. Find deals

Question 2

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

Accepted Answer

Cheapflights users have booked flights from Boston to San Francisco round-trip from $367. Other airlines that can offer you cheap pricing are Alaska Airlines, from $375, and United Airlines, from $401. These flights start at 35% lower than the current average price 3 months from now. Find deals

Question 3

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

Accepted Answer

$188 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Hawaiian Airlines and JetBlue, with prices starting from $203 and $204, respectively. Find deals

Question 4

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

Accepted Answer

The price you pay for your flight from Boston to San Francisco may vary depending on when you book. For the best chance of a lower fare, look to book 56 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date. Find deals

Question 5

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

Accepted Answer

Currently, March is the cheapest month in which you can book a flight from Boston to San Francisco (average of $876). Flying from Boston to San Francisco in December is currently the most expensive (average of $1,375). 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 Wednesday afternoons when fares are most often at their lowest. Thursday 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 Monday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (27 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

While on average a flight from Boston to San Francisco is generally $1,058, our data shows the cheapest flight currently is $282. When looking at the most popular route, (Boston Logan Intl - San Francisco), you can expect to pay $350 for that flight.

Question 11

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

Accepted Answer

The top 3 most reliable airlines when flying from Boston to San Francisco are Air China (100%), ANA (83%) and WestJet (80%).

Question 12

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

Accepted Answer

Tuesday is generally a great day to depart. Flying on this day could help you save up to 89%.

Question 13

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

Accepted Answer

Travellers have found it’s best to book a flight 57 days in advance to save up to 76% 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 $630, or $819 for flights within the next 24 hours.

Question 14

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

Accepted Answer

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, September can be a great choice for travel to San Francisco. Flights to San Francisco from Boston in September are about $571 on average during September, but can be found for as low as $200.

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 morning. If you’re flexible enough to do this you can expect to save up to 53% on your trip compared to booking a flight in the afternoon.

Question 16

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 17

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 18

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 19

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

Accepted Answer

Cheapflights helps you search for flights from Boston to San Francisco via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 20

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

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from Boston to San Francisco for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 21

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

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from Boston to San Francisco flexibly with Cheapflights today.

Question 22

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	$367
One-way from	$188
Popular in	June
Cheapest in	September
Average price	$594
Good one-way deal	$1,058 or less

Cheap flights from Boston to San Francisco from $188

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 13/5. 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 Tuesday or Thursday and return on a Tuesday

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 15 April 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 15 April 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 11 April 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 15 April 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 15 April 2025.

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

Reviews of airlines servicing San Francisco

To help decide which airline to fly from Boston to San Francisco, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline compares 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.

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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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 15 April 2025.