Cheap flights from Boston to San Francisco (BOS - SFO)

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The best prices from Boston to San Francisco are usually found in January or February, booked 34 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

How to find the cheapest flight from
Boston (BOS) to San Francisco (SFO)

All the information you need to plan the best BOS to SFO flight in 2021: compare Boston to San Francisco flight prices with the expected peak season, weather and rainfall in San Francisco.
BOS - SFO
Price
$267 - $403
SFO
Temperature
59 - 77 °F
SFO
Rainfall
0 - 4.7 inches

Popular in

December

High demand for flights, 25% potential price rise

Cheapest in

January

Best time to find cheap flights, 12% potential price drop

Round-trip from

$267

From Boston to San Francisco

One-way from

$134

One-way flight from Boston to San Francisco

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Boston to San Francisco?

Saturday flights are found to be more expensive to fly from Boston to San Francisco. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to San Francisco.

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

To save on the cost of your flight from Boston to San Francisco, book at least 35 days before your planned departure. Booking around this time can save you about 7% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $99 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $105.

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

The best pricing can be found in the month of August. Prices to San Francisco from Boston average $108. You can even find prices in August for less than $108, as users have found deals to San Francisco from as low as $48. The month of June appears to be one of the more expensive times to travel to San Francisco from Boston. Flying in the targeted month can save you up to 17%.

When is the cheapest time to fly from Boston to San Francisco (BOS - SFO)?

Unlike in the afternoon, when flights are generally more expensive, you can save up to 37% on flights from Boston to San Francisco by exploring options for tickets at noon.

Cheap flights from Boston to San Francisco in May, June 2021

The best prices found for BOS to SFO flights for May, June
10 Jun - 9 Jul
$297pp
BOS
Boston Logan Intl
JetBlue
Non-Stop
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl
5 Jun - 15 Jun
$299pp
BOS
Boston Logan Intl
American Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
American Airlines
 
1 STOP
BOS
Boston Logan Intl
9 Jun - 8 Jul
$306pp
BOS
Boston Logan Intl
Multiple Airlines
 
1 STOP
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl

Boston to San Francisco 2021 flight deals

Cheap flights to San Francisco from Boston found for this year
18 Aug - 25 Aug
$204pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
18 Aug - 25 Aug
$231pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
18 Aug - 25 Aug
$236pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
 
1 STOP
BOS
Boston Logan Intl

Non-stop flights to San Francisco from Boston

Save time with Boston to San Francisco direct flight deals
16 Sep - 20 Sep
$277pp
BOS
Boston Logan Intl
Delta
Non-Stop
SFO
San Francisco
SFO
San Francisco
Delta
Non-Stop
BOS
Boston Logan Intl
13 Sep - 20 Sep
$287pp
BOS
Boston Logan Intl
Delta
Non-Stop
SFO
San Francisco
SFO
San Francisco
Delta
Non-Stop
BOS
Boston Logan Intl
9 Jul - 25 Jul
$297pp
BOS
Boston Logan Intl
JetBlue
Non-Stop
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl

Last minute flights from Boston to San Francisco

Late deals on round-trip flights to San Francisco from Boston, departing today and this week
25 May - 7 Jun
$325pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
 
1 STOP
BOS
Boston Logan Intl
25 May - 29 Jun
$333pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
25 May - 7 Jun
$334pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
   
2 STOPS
BOS
Boston Logan Intl

One-way flights to San Francisco from Boston

The cheapest one-way flights from Boston to San Francisco
2:14 pm - 8:06 pm
Major Airline
1 Stop
8h 52m
BOS - SFO
Major Airline
$134
StudentUniverse
11:56 am - 5:56 am
Frontier
2 Stops
45h 00m
BOS - SFO
Frontier
$153
Kiwi.com
2:40 am - 11:44 am
Delta
1 Stop
12h 04m
BOS - SFO
Delta
$158
Delta

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Boston</span> to <span class="emphasized">San Francisco</span> flights.

Flight FAQs

From Boston to San Francisco

Are flight prices decreasing from Boston to San Francisco due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Boston and San Francisco for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Boston Logan Intl to San Francisco to control the spread of COVID-19?

New policies can now be found on Alaska Airlines to help keep travelers safe while flying. New policies for travelers booking flights from Boston Logan Intl to San Francisco include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from Boston Logan Intl to San Francisco have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like United Airlines, JetBlue, and Delta flying from Boston Logan Intl to San Francisco have implemented new flexible cancellation policies.

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

If you book a flight from Boston to San Francisco, you will be flying from Logan Intl to San Francisco. Flights to San Francisco (SFO) from Boston Logan Intl (BOS) take 6h 25m for a nonstop flight. There are 14 flights from Logan Intl to San Francisco per day from 9 airlines.

Can I find flights from Boston to San Francisco for under $300 on Cheapflights?

Yes, there are multiple flights from Boston to San Francisco for under $300. The cheapest flight booked recently is on Multiple Airlines for just $204, but on average you can expect to pay $251.

Are there nonstop flights from Boston to San Francisco for under $300 on Cheapflights?

Cheapflights has at least 20 direct flights from Boston to San Francisco under $300. A good price for a nonstop flight from Boston to San Francisco is less than $324.

Are there last-minute flights available from Boston to San Francisco for under $400?

There are currently 20+ open flights from Boston to San Francisco within the next 7 days for less than $400.

What days are nonstop flights available from Boston to San Francisco?

Nonstop flights can be found on the following days: Monday.

How popular is this flight route?

Flights from Boston Logan Intl to San Francisco have been viewed 318 times in the past calendar month.

How many flights depart from Boston to San Francisco on average per day?

On average, you can expect to see 1 flight from Boston Logan Intl to San Francisco a day.
Morning (6am - Noon) - 100% of flight departures

Does it rain more in Boston or San Francisco?

Expected rainfall in Boston is less than in San Francisco. You can expect this to be the case over the next 16 days.

Is Boston weather warmer or cooler than San Francisco?

Temperatures around the 84 °F's can be experienced in July. The weather in San Francisco is colder than in Boston. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from Boston to San Francisco?

Delta and Major Airline can get you from Boston to San Francisco in just under 7h 05m. Your travel time can differ by up to 2h 58m. Boston and San Francisco are separated by a distance of 2712 mi. This flight may include one or multiple stops.

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

Currently priced at $270, Major Airline will fly you from Boston to San Francisco and back. In addition to Major Airline, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Delta for as low as $277. Major Airline is 10% cheaper than the average price of flights available within the next 90 days to this destination.

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

For one-way options, check prices for Major Airline. According to our data, you can fly for as low as $134. Users have also found prices from $139 and $142 on Major Airline and Delta, respectively.

Alternative routes for Boston to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for San Francisco

Things to know before you go - useful duration and weather info for your trip from Boston to San Francisco.
Flight duration
6h 25m
Average temperature for May in San Francisco
69.8 °F
Avg rainfall for May in San Francisco
0.6 ″

Airports servicing Boston

Airports servicing San Francisco

Top 8 airlines flying from Boston to San Francisco

The chart below displays the airlines Cheapflights users traveling from Boston to San Francisco choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Spirit Airlines
$107 $230 No cancel fee 65%
Frontier
$114 $270 No cancel fee 62%
Alaska Airlines
$108 $286 No cancel fee 75%
American Airlines
$126 $288 No cancel fee 71%
Delta
$118 $291 No cancel fee N/A
Sun Country Air
$118 $302 No cancel fee 83%
United Airlines
$118 $353 No cancel fee 69%
JetBlue
$128 $373 No cancel fee 62%

Hourly flight availability from Boston to San Francisco

See what time of day planes typically take off from Boston towards San Francisco.
Afternoon Noon to 6 PM 45% of BOS to SFO departures
Morning 6 AM to noon 43% of BOS to SFO departures
Early morning Midnight to 6 AM 12% of BOS to SFO departures
Evening 6 PM to midnight 0% of BOS to SFO departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Boston to San Francisco
See how many times per day planes take to the skies headed from Boston to San Francisco.
Sunday
16 daily flights
Monday
15 daily flights
Tuesday
11 daily flights
Wednesday
13 daily flights
Thursday
13 daily flights
Friday
20 daily flights
Saturday
10 daily flights
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