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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 September or October, booked 53 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
$277 - $403
SFO
Temperature
59 - 77 °F
SFO
Rainfall
0 - 4.7 inches
Popular in December High demand for flights, 20% potential price rise
Cheapest in September Best time to find cheap flights, 14% potential price drop
Round-trip from NT$ 277 From Boston to San Francisco
One-way from NT$ 118 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 44 days before your planned departure. Booking around this time can save you about 20% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $117 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $137.

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

The best pricing can be found in the month of February. Prices to San Francisco from Boston average $121. You can even find prices in February for less than $121, as users have found deals to San Francisco from as low as $61. The month of April 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 8%.

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 September, October 2020

The best prices found for BOS to SFO flights for September, October
28 Oct - 4 Nov
$132pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
28 Oct - 8 Nov
$133pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
28 Oct - 4 Nov
$135pp
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 2020 flight deals

Cheap flights to San Francisco from Boston found for this year
28 Oct - 4 Nov
$132pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
28 Oct - 8 Nov
$133pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
28 Oct - 4 Nov
$135pp
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
17 Oct - 7 Nov
$247pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl
28 Oct - 3 Nov
$249pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
United Airlines
Non-Stop
BOS
Boston Logan Intl
28 Oct - 4 Nov
$256pp
BOS
Boston Logan Intl
Multiple Airlines
Non-Stop
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
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
2 Oct - 28 Oct
$189pp
BOS
Boston Logan Intl
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
   
2 STOPS
BOS
Boston Logan Intl
2 Oct - 2 Nov
$193pp
BOS
Boston Logan Intl
Multiple Airlines
     
3 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
BOS
Boston Logan Intl
3 Oct - 27 Oct
$210pp
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
   
2 STOPS
BOS
Boston Logan Intl

One-way flights to San Francisco from Boston

The cheapest one-way flights from Boston to San Francisco
6:30 am - 8:43 am
Major Airline
1 Stop
29h 13m
BOS - SFO
Major Airline
$118
StudentUniverse
1:50 am - 8:31 am
Delta
1 Stop
9h 41m
BOS - SFO
Delta
$128
Delta
7:12 am - 4:38 am
Multiple Airlines
3 Stops
24h 26m
BOS - SFO
Multiple Airlines
$133
Gotogate

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.

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 $132, but on average you can expect to pay $145.

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.

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

Nonstop flights can be found on the following days: Sunday, Monday, Tuesday, Wednesday, Saturday.

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 3 flights from Boston Logan Intl to San Francisco a day.
Afternoon (Noon - 6pm) - 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 12 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 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 $118. Users have also found tickets on Delta for as little as $124.

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 September in San Francisco
77.0 °F
Avg rainfall for September in San Francisco
0.1 ″

Airports servicing Boston

Airports servicing San Francisco

Hourly flight availability from Boston to San Francisco

Morning 6 AM to noon 52% of BOS to SFO departures
Afternoon Noon to 6 PM 47% of BOS to SFO departures
Early morning Midnight to 6 AM 1% 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
16 daily flights
Monday
16 daily flights
Tuesday
16 daily flights
Wednesday
17 daily flights
Thursday
15 daily flights
Friday
18 daily flights
Saturday
12 daily flights
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