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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

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 $277 From Boston to San Francisco
One-way from $160 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.

Cheap flights from Boston to San Francisco in May, June 2020

The best prices found for BOS to SFO flights for May, June
19 Jun - 23 Jun
$218pp
BOS
Boston Logan Intl
$self.airline
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
   
2 STOPS
BOS
Boston Logan Intl
19 Jun - 24 Jun
$243pp
BOS
Boston Logan Intl
$self.airline
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
     
3 STOPS
BOS
Boston Logan Intl
19 Jun - 24 Jun
$253pp
BOS
Boston Logan Intl
$self.airline
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
   
2 STOPS
BOS
Boston Logan Intl

Boston to San Francisco 2020 flight deals

Cheap flights to San Francisco from Boston found for this year
8 Jul - 13 Jul
$210pp
BOS
Boston Logan Intl
$self.airline
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
19 Jun - 23 Jun
$218pp
BOS
Boston Logan Intl
$self.airline
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier
   
2 STOPS
BOS
Boston Logan Intl
8 Jul - 10 Jul
$222pp
BOS
Boston Logan Intl
$self.airline
   
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
19 Jul - 26 Jul
$294pp
BOS
Boston Logan Intl
JetBlue
Non-Stop
SFO
San Francisco
SFO
San Francisco
JetBlue
Non-Stop
BOS
Boston Logan Intl
9 Jun - 17 Jun
$297pp
BOS
Boston Logan Intl
$self.airline
Non-Stop
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
21 Oct - 25 Oct
$304pp
BOS
Boston Logan Intl
$self.airline
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
29 May - 2 Jun
$381pp
BOS
Boston Logan Intl
$self.airline
Non-Stop
SFO
San Francisco
SFO
San Francisco
American Airlines
 
1 STOP
BOS
Boston Logan Intl
26 May - 10 Jun
$383pp
BOS
Boston Logan Intl
$self.airline
 
1 STOP
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
29 May - 2 Jun
$426pp
BOS
Boston Logan Intl
$self.airline
   
2 STOPS
SFO
San Francisco
SFO
San Francisco
Delta
 
1 STOP
BOS
Boston Logan Intl

One-way flights to San Francisco from Boston

The cheapest one-way flights from Boston to San Francisco
7:45 am - 12:57 pm
Sun Country Air
1 Stop
8h 12m
BOS - SFO
Sun Country Air
10:49 am - 4:20 pm
Delta
1 Stop
8h 31m
BOS - SFO
Delta
$163
Delta
4:01 am - 2:29 pm
Multiple Airlines
2 Stops
13h 28m
BOS - SFO
Multiple Airlines
$165
FlyFar

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 $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 $210, but on average you can expect to pay $244.

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 $337.

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

There are currently 3+ 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: Tuesday, Saturday.

How popular is this flight route?

Flights from Boston Logan Intl to San Francisco have been viewed 263 times in the past calendar month.

What is the cheapest airline for this route?

United Air Lines Inc. offers the cheapest flights from Boston to San Francisco. Per day you can find on average 140 flights for this route and airline.

How long does the flight from Boston to San Francisco take?

A nonstop flight takes up to 7 hours, covering a distance of 1,685 miles.

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

On average, you can expect to see 8 flights from Boston Logan Intl to San Francisco a day.
Morning (6am - Noon) - 25% of flight departures
Afternoon (Noon - 6pm) - 38% of flight departures
Evening (6pm - Midnight) - 38% 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.

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 May in San Francisco
69.8 °F
Avg rainfall for May in San Francisco
0.6 ″

Airports servicing Boston

Airports servicing San Francisco

Hourly flight availability from Boston to San Francisco

Afternoon Noon to 6 PM 65% of BOS to SFO departures
Morning 6 AM to noon 25% of BOS to SFO departures
Evening 6 PM to midnight 9% of BOS to SFO departures
Early morning Midnight to 6 AM 1% of BOS to SFO departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Boston to San Francisco
Sunday
5 daily flights
Monday
5 daily flights
Tuesday
3 daily flights
Wednesday
3 daily flights
Thursday
5 daily flights
Friday
5 daily flights
Saturday
3 daily flights