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

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The best prices from San Francisco International to Boston are usually found in February or January, booked 32 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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

All the information you need to plan the best SFO to BOS flight in 2021: compare San Francisco International to Boston flight prices with the expected peak season, weather and rainfall in Boston.
SFO - BOS
Price
$257 - $434
BOS
Temperature
39.2 - 84.2 °F
BOS
Rainfall
2.8 - 3.9 inches

Popular in

December

High demand for flights, 27% potential price rise

Cheapest in

February

Best time to find cheap flights, 19% potential price drop

Round-trip from

$257

From San Francisco International to Boston

One-way from

$134

One-way flight from San Francisco International to Boston

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 San Francisco International to Boston?

Travelers have found that booking a Tuesday departure is the best way to save up to 34% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 20 days in advance, which can save you up to 25% on flights from San Francisco International to Boston compared to booking the week you need them. Waiting 20 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $185. For sooner than that we have options available in the next 3 days from $243.

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

Flights from San Francisco International to Boston lean towards being more expensive in December. Prices are generally better when you fly from San Francisco International to Boston in August, with the cheapest ticket starting at $50.

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

One of the essential ways to save on airfare from San Francisco International to Boston is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 28% on airfare.

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

The best prices found for SFO to BOS flights for May, June
11 May - 18 May
$175pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
   
2 STOPS
SFO
San Francisco
18 May - 22 May
$180pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
12 May - 17 May
$183pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco

San Francisco International to Boston 2021 flight deals

Cheap flights to Boston from San Francisco International found for this year
11 May - 18 May
$175pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
   
2 STOPS
SFO
San Francisco
18 May - 22 May
$180pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
12 May - 17 May
$183pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco

Non-stop flights to Boston from San Francisco International

Save time with San Francisco International to Boston direct flight deals
26 Sep - 6 Oct
$277pp
SFO
San Francisco
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SFO
San Francisco
8 Sep - 17 Sep
$278pp
SFO
San Francisco
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SFO
San Francisco
14 Sep - 17 Sep
$279pp
SFO
San Francisco
Alaska Airlines
Non-Stop
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Alaska Airlines
Non-Stop
SFO
San Francisco

Last minute flights from San Francisco International to Boston

Late deals on round-trip flights to Boston from San Francisco International, departing today and this week
11 May - 18 May
$175pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Frontier
   
2 STOPS
SFO
San Francisco
12 May - 17 May
$183pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco
11 May - 17 May
$189pp
SFO
San Francisco
Multiple Airlines
   
2 STOPS
BOS
Boston Logan Intl
BOS
Boston Logan Intl
Multiple Airlines
   
2 STOPS
SFO
San Francisco

One-way flights to Boston from San Francisco International

The cheapest one-way flights from San Francisco International to Boston
1:40 am - 1:10 pm
Major Airline
1 Stop
8h 30m
SFO - BOS
Major Airline
$134
StudentUniverse
1:50 pm - 6:36 am
Sun Country Air
1 Stop
13h 46m
SFO - BOS
Sun Country Air
$137
mytrip.com
12:44 pm - 10:59 am
Frontier
2 Stops
43h 15m
SFO - BOS
Frontier
$142
Kiwi.com

Related info for your journey

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

Flight FAQs

From San Francisco International to Boston

Are flight prices decreasing from San Francisco to Boston 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 San Francisco and Boston 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 San Francisco to Boston Logan Intl to control the spread of COVID-19?

Alaska Airlines and Delta are some of the many airlines that have implemented additional safety measures to control the spread of COVID-19. Some of the new policies that have been implemented to accommodate travelers flying from San Francisco to Boston Logan Intl are improved sanitation, HEPA filters, mask requirements, social distance seating (for a limited time), and pre-flight testing for antibodies and symptoms. Policies will vary by airline.

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

United Airlines, JetBlue, and Delta are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

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

To fly from San Francisco to Boston, you need to book a flight from San Francisco (SFO) to Logan Intl (BOS). Nonstop flights to Boston Logan Intl from San Francisco take 5h 27m on average. When it comes time to book airfare, you have a few options: there are 6 outbound flights from San Francisco to Logan Intl offered by 9 different airlines.

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

Yes, there are multiple flights from San Francisco International to Boston for under $200. The cheapest flight booked recently is on Multiple Airlines for just $175, but on average you can expect to pay $220.

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

Cheapflights has at least 20 direct flights from San Francisco International to Boston under $300. A good price for a nonstop flight from San Francisco International to Boston is less than $292.

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

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

How popular is this flight route?

Within the past month, 261 users have taken a look at flights from San Francisco to Boston Logan Intl.

Does it rain more in San Francisco or Boston?

When traveling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in San Francisco is roughly less than Boston. You can assume this to be the case over the next 7 days.

Is San Francisco weather warmer or cooler than Boston?

Expect the weather to be around 84 °F on average in July. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in Boston is generally hotter than in San Francisco.

How long is the flight from San Francisco International to Boston?

Major Airline and Frontier can get you from San Francisco International to Boston in just under 9h 59m. Your travel time can differ by up to 8h 46m. This flight may include one or multiple stops.

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

Frontier, at $227, was found to be the cheapest airline from San Francisco International to Boston.. Users have found that Frontier is 28% cheaper than the other options available to this destination.

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

The cheapest airlines for a one-way flight from San Francisco International to Boston are Frontier ($89), Major Airline ($134), and Sun Country Air ($137).

Alternative routes for San Francisco International to Boston

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

Destination information for Boston

Things to know before you go - useful duration and weather info for your trip from San Francisco International to Boston.
Average temperature for May in Boston
68.0 °F
Avg rainfall for May in Boston
3.7 ″

Airports servicing San Francisco

Airports servicing Boston

Top 8 airlines flying from San Francisco International to Boston

The chart below displays the airlines Cheapflights users traveling from San Francisco International to Boston 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
Frontier
$114 $260 No cancel fee 62%
Sun Country Air
$151 $262 No cancel fee 83%
American Airlines
$117 $298 No cancel fee 71%
Delta
$118 $314 No cancel fee N/A
Spirit Airlines
$127 $325 No cancel fee 65%
Alaska Airlines
$118 $331 No cancel fee 75%
United Airlines
$138 $405 No cancel fee 69%
JetBlue
$152 $410 No cancel fee 62%

Hourly flight availability from San Francisco International to Boston

See what time of day planes typically take off from San Francisco International towards Boston.
Afternoon Noon to 6 PM 67% of SFO to BOS departures
Evening 6 PM to midnight 25% of SFO to BOS departures
Morning 6 AM to noon 7% of SFO to BOS departures
Early morning Midnight to 6 AM 1% of SFO to BOS departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from San Francisco International to Boston
See how many times per day planes take to the skies headed from San Francisco International to Boston.
Sunday
7 daily flights
Monday
10 daily flights
Tuesday
8 daily flights
Wednesday
8 daily flights
Thursday
7 daily flights
Friday
3 daily flights
Saturday
2 daily flights
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