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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)

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

$71

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 33% on flights from Boston to San Francisco by exploring options for tickets at noon.

Cheap flights from Boston to San Francisco in January, February 2021

The best prices found for BOS to SFO flights for January, February
7 Feb - 12 Feb
$161pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
22 Feb - 28 Feb
$165pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
19 Feb - 26 Feb
$166pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl

Boston to San Francisco 2021 flight deals

Cheap flights to San Francisco from Boston found for this year
10 Mar - 14 Mar
$154pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
7 Feb - 12 Feb
$161pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
3 Mar - 9 Mar
$163pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl

Non-stop flights to San Francisco from Boston

Save time with Boston to San Francisco direct flight deals
14 Feb - 14 Feb
$234pp
BOS
Boston Logan Intl
JetBlue
Non-Stop
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl
14 Feb - 23 Feb
$235pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl
14 Feb - 17 Feb
$236pp
BOS
Boston Logan Intl
Multiple Airlines
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
30 Jan - 4 Feb
$168pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
30 Jan - 5 Feb
$186pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
   
2 STOPS
BOS
Boston Logan Intl
28 Jan - 4 Feb
$187pp
BOS
Boston Logan Intl
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
BOS
Boston Logan Intl

One-way flights to San Francisco from Boston

The cheapest one-way flights from Boston to San Francisco
6:53 am - 5:02 am
Multiple Airlines
2 Stops
25h 09m
BOS - SFO
Multiple Airlines
$71
Gotogate
12:04 pm - 7:10 am
Multiple Airlines
2 Stops
22h 06m
BOS - SFO
Multiple Airlines
$72
Gotogate
9:55 am - 8:10 am
Multiple Airlines
2 Stops
25h 15m
BOS - SFO
Multiple Airlines
$73
mytrip.com

Related info for your journey

Useful info, stats and facts about Boston to San Francisco 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 and Delta 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.

Can I find flights from Boston to San Francisco for under $200 on Cheapflights?

Yes, there are multiple flights from Boston to San Francisco for under $200. The cheapest flight booked recently is on Multiple Airlines for just $154, but on average you can expect to pay $171.

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 $274.

Are there last-minute flights available from Boston to San Francisco for under $200?

There are currently 20+ open flights from Boston to San Francisco within the next 7 days for less than $200.

How popular is this flight route?

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

Does it rain more in Boston or San Francisco?

Expected rainfall in Boston is more 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.

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

Currently priced at $184, Frontier will fly you from Boston to San Francisco and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Frontier is 39% 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 Frontier. According to our data, you can fly for as low as $75.

Alternative routes for Boston to San Francisco

Destination information for San Francisco

Things to know before you go. Useful info for your trip from Boston to San Francisco
Average temperature for January in San Francisco
59.0 °F
Avg rainfall for January in San Francisco
2.2 ″

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

Morning 6 AM to noon 70% of BOS to SFO departures
Afternoon Noon to 6 PM 30% of BOS to SFO departures
Early morning Midnight to 6 AM 0% 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
Sunday
3 daily flights
Monday
4 daily flights
Tuesday
3 daily flights
Wednesday
4 daily flights
Thursday
4 daily flights
Friday
3 daily flights
Saturday
4 daily flights
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