Cheap flights from San Francisco to Boston (SFO - BOS) from $73

This is the cheapest one-way flight price, found on 9/21. Prices may vary by date and flight preferences.
SFO — BOS
Sep 26 — Oct 31

The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 27 days in advance, depart on a Tuesday or Monday and return on a Thursday

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

All the information you need to plan the best SFO to BOS flight in 2023: compare San Francisco to Boston flight prices with the expected peak season, weather and rainfall in Boston.

Popular in

July

Cheapest in

January

Round-trip from

$198

One-way from

$99
High demand for flights, 32% potential price rise
Best time to find cheap flights, 43% potential price drop
From San Francisco to Boston Logan Intl
One-way flight from San Francisco to Boston Logan Intl

SFO - BOS

Price

$198 - $399

BOS

Temperature

30.2 - 73.4 °F

BOS

Rainfall

3.1 - 4 inches

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

Users have found that flying from San Francisco to Boston on a Wednesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

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

Find a great deal and save up to 25% by booking at least 26 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from San Francisco to Boston within the next two weeks, with the cheapest ticket starting at $504.

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

January can be a great time to fly to Boston from San Francisco with a flight ticket averaging about $464. Cheapflights users have found deals in the month of January for as cheap as $179. The most expensive prices can be found in the month of July.

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

It’s typically best to fly out from San Francisco to Boston in the evening. Doing so could potentially save you 11% on the flight price compared to flying in the morning, which is usually more expensive.

Cheap Frontier flights from San Francisco to Boston

Take a peek at the cheapest Frontier flights we've detected traveling from San Francisco to Boston. Be sure to come back soon if the deals available don't appeal to you at this time.
  • One of the most popular airlines traveling from San Francisco to Boston is Frontier. Flights from Frontier traveling this route typically cost $382.86 RT. This price is typically 48% cheaper than other airlines that offer San Francisco to Boston flights. When booking this route, the cheapest RT price found was $129. San Francisco Airport is the most common San Francisco airport to take off from when flying to Boston. Boston Logan Intl Airport is the most popular arrival airport in Boston. When flying from San Francisco to Boston, Frontier flights are 10% more popular than any other airline flying that same route.

Cheap Delta flights from San Francisco to Boston

Browse through some of the cheapest Delta flights traveling from San Francisco to Boston. Make sure to examine the flight information before completing your reservation.
  • One of the most popular airlines traveling from San Francisco to Boston is Delta. Flights from Delta traveling this route typically cost $379.81 RT. This price is typically 64% cheaper than other airlines that offer San Francisco to Boston flights. When booking this route, the cheapest RT price found was $152. San Francisco Airport is the most common San Francisco airport to take off from when flying to Boston. Boston Logan Intl Airport is the most popular arrival airport in Boston. When flying from San Francisco to Boston, Delta flights are 8% more popular than any other airline flying that same route.

Cheap San Francisco to Boston flights in September & October 2023

The best prices found for SFO to BOS flights for September, October
These are some of the best deals we've found on flights to Boston in 2023 at this time. For more flight deals, be sure to check back very soon.

San Francisco to Boston 2023 flight deals

Cheap flights to Boston from San Francisco found for this year
These are some of the best deals we've found on flights to Boston in 2023 at this time. For more flight deals, be sure to check back very soon.

Non-stop flights to Boston from San Francisco

Save time with San Francisco to Boston direct flight deals
For a shorter flight, select one of these non-stop flights from San Francisco to Boston. Select from other flights from San Francisco to Boston by using the search form above.

San Francisco to Boston flights leaving soon

Late deals on return flights to Boston from San Francisco, departing today and this week
Check out these flights departing soon from San Francisco to Boston. To prevent any unwanted surprises, users should verify their flight info before booking.

One-way flights to Boston from San Francisco

The cheapest one-way flights from San Francisco to Boston
Take a look at some of the best available options we've come across on one-way flights from San Francisco to Boston. Users can also find round-trip San Francisco to Boston flights by using the search form above.

Find flights from San Francisco to Boston within your budget

Use the slider to find flights from San Francisco to Boston that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$149 - $267

Route

Depart

Return

Price

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Tue 10/24

2 stops22h 57m

Boston Logan Intl

Sat 10/28

1 stop9h 51m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Tue 10/17

2 stops23h 46m

Boston Logan Intl

Sat 11/4

1 stop9h 51m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Wed 10/25

2 stops18h 23m

Boston Logan Intl

Sat 10/28

1 stop9h 51m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Fri 12/1

1 stop11h 23m

Boston Logan Intl

Tue 12/5

1 stop11h 14m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Sun 12/3

1 stop30h 20m

Boston Logan Intl

Wed 12/6

1 stop15h 40m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Fri 10/27

Nonstop5h 43m

Boston Logan Intl

Tue 10/31

Nonstop6h 46m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Sat 11/4

1 stop10h 52m

Boston Logan Intl

Fri 12/8

1 stop11h 47m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Tue 10/17

Nonstop5h 45m

Boston Logan Intl

Sun 11/5

Nonstop7h 03m

San FranciscoBoston Logan Intl

SFO - BOS

SFOBOS

San Francisco

Wed 10/11

1 stop7h 45m

Boston Logan Intl

Wed 10/25

Nonstop6h 37m

Flights are sorted by cheapest first

Deals found on 9/19

Reviews of airlines servicing Boston

Get a feel of what it's like to fly with Frontier, Delta and JetBlue from San Francisco to Boston by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
1,393 reviews

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Food

7.2

Entertainment

7.2

Reviews

1 / 10

We were rebooked from our original 7 am flight to a 9:25 am flight. We tried but could not get seat assignments upon online check-in. At the airport, the security officer almost did not let us through to the gate, since our boarding pass had no QR code and said "seat assignment at the gate." When we made it to the gate and asked for seat assignments, the gate agents kept telling us that they were not authorized to assign us seats and that we would be assigned seats 30 mins prior to departure. They referred us to the service center that would not help either. Since they also said that the flight was full, we were left in doubt if we were going to make it onto this flight. Finally, after everybody else's seats had been assigned, about 15 mins to departure they assigned us two separate seats. We could not sit together. Whoever designed seat assignment and boarding procedures at Alaska Airlines must have zero understanding of how to make such a process work smoothly and efficiently. We'll think twice before booking another flight with Alaska!

Alaska Airlines
8.1
Very good
1,393 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Food

7.2

Entertainment

7.2

Reviews

1 / 10

We were rebooked from our original 7 am flight to a 9:25 am flight. We tried but could not get seat assignments upon online check-in. At the airport, the security officer almost did not let us through to the gate, since our boarding pass had no QR code and said "seat assignment at the gate." When we made it to the gate and asked for seat assignments, the gate agents kept telling us that they were not authorized to assign us seats and that we would be assigned seats 30 mins prior to departure. They referred us to the service center that would not help either. Since they also said that the flight was full, we were left in doubt if we were going to make it onto this flight. Finally, after everybody else's seats had been assigned, about 15 mins to departure they assigned us two separate seats. We could not sit together. Whoever designed seat assignment and boarding procedures at Alaska Airlines must have zero understanding of how to make such a process work smoothly and efficiently. We'll think twice before booking another flight with Alaska!

Delta
7.9
Good
3,016 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Food

7.2

Entertainment

7.2

Reviews

1 / 10

We were rebooked from our original 7 am flight to a 9:25 am flight. We tried but could not get seat assignments upon online check-in. At the airport, the security officer almost did not let us through to the gate, since our boarding pass had no QR code and said "seat assignment at the gate." When we made it to the gate and asked for seat assignments, the gate agents kept telling us that they were not authorized to assign us seats and that we would be assigned seats 30 mins prior to departure. They referred us to the service center that would not help either. Since they also said that the flight was full, we were left in doubt if we were going to make it onto this flight. Finally, after everybody else's seats had been assigned, about 15 mins to departure they assigned us two separate seats. We could not sit together. Whoever designed seat assignment and boarding procedures at Alaska Airlines must have zero understanding of how to make such a process work smoothly and efficiently. We'll think twice before booking another flight with Alaska!

Sun Country Air
7.4
Good
94 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Food

7.2

Entertainment

7.2

Reviews

1 / 10

We were rebooked from our original 7 am flight to a 9:25 am flight. We tried but could not get seat assignments upon online check-in. At the airport, the security officer almost did not let us through to the gate, since our boarding pass had no QR code and said "seat assignment at the gate." When we made it to the gate and asked for seat assignments, the gate agents kept telling us that they were not authorized to assign us seats and that we would be assigned seats 30 mins prior to departure. They referred us to the service center that would not help either. Since they also said that the flight was full, we were left in doubt if we were going to make it onto this flight. Finally, after everybody else's seats had been assigned, about 15 mins to departure they assigned us two separate seats. We could not sit together. Whoever designed seat assignment and boarding procedures at Alaska Airlines must have zero understanding of how to make such a process work smoothly and efficiently. We'll think twice before booking another flight with Alaska!

United Airlines
7.4
Good
1,887 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Food

7.2

Entertainment

7.2

Reviews

1 / 10

We were rebooked from our original 7 am flight to a 9:25 am flight. We tried but could not get seat assignments upon online check-in. At the airport, the security officer almost did not let us through to the gate, since our boarding pass had no QR code and said "seat assignment at the gate." When we made it to the gate and asked for seat assignments, the gate agents kept telling us that they were not authorized to assign us seats and that we would be assigned seats 30 mins prior to departure. They referred us to the service center that would not help either. Since they also said that the flight was full, we were left in doubt if we were going to make it onto this flight. Finally, after everybody else's seats had been assigned, about 15 mins to departure they assigned us two separate seats. We could not sit together. Whoever designed seat assignment and boarding procedures at Alaska Airlines must have zero understanding of how to make such a process work smoothly and efficiently. We'll think twice before booking another flight with Alaska!

American Airlines
7.2
Good
2,635 reviews
Alaska Airlines
8.1
Very good
1,393 reviews

Crew

8.6

Overall

8.1

Boarding

8.3

Comfort

8.0

Food

7.2

Entertainment

7.2

Reviews

1 / 10

We were rebooked from our original 7 am flight to a 9:25 am flight. We tried but could not get seat assignments upon online check-in. At the airport, the security officer almost did not let us through to the gate, since our boarding pass had no QR code and said "seat assignment at the gate." When we made it to the gate and asked for seat assignments, the gate agents kept telling us that they were not authorized to assign us seats and that we would be assigned seats 30 mins prior to departure. They referred us to the service center that would not help either. Since they also said that the flight was full, we were left in doubt if we were going to make it onto this flight. Finally, after everybody else's seats had been assigned, about 15 mins to departure they assigned us two separate seats. We could not sit together. Whoever designed seat assignment and boarding procedures at Alaska Airlines must have zero understanding of how to make such a process work smoothly and efficiently. We'll think twice before booking another flight with Alaska!

Related info for your journey

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

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 45 outbound flights from San Francisco to Logan Intl offered by 8 different airlines.

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

Yes, there are multiple flights from San Francisco to Boston for under $200. The cheapest flight booked recently is on Multiple Airlines for just $149, but on average you can expect to pay $176.

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

Cheapflights has at least 20 direct flights from San Francisco to Boston under $300. A good price for a nonstop flight from San Francisco to Boston is less than $268.

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

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

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

You can find nonstop flights on the following days: Sunday, Monday, Tuesday, Thursday, Friday, Saturday.

How popular is this San Francisco to Boston flight route?

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

On average 27 flights depart from San Francisco to Boston per day.
Morning (6am - Noon) - 33% of flight departures
Evening (6pm - Midnight) - 67% of flight departures

How long is the flight from San Francisco to Boston?

For as low as $185, Frontier can have you in Boston from San Francisco in 30h 20m. San Francisco and Boston are separated by a distance of 2712 mi.

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

Currently priced at $185, Frontier will fly you from San Francisco to Boston and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Frontier is 60% cheaper than the average price of flights available within the next 90 days to this destination.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $76. JetBlue flights start at $99 while deals on Delta start at $112 one-way.

What are the most popular airlines that fly from San Francisco to Boston?

What are the most reliable airlines from San Francisco to Boston?

Consider EL AL (96%), WestJet (90%) or LATAM Airlines (90%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Boston.

What are the cheapest flights from San Francisco to Boston?

Looking at all options, your cheapest flight can be booked for $112. While the most popular route (San Francisco - Boston Logan Intl) can be booked for $181 on average our data indicates $900 when flying from San Francisco to Boston.

What does SFO to BOS mean?

SFO and BOS are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. SFO to BOS refers to a flight route from San Francisco Airport to Boston Logan Intl Airport.

Alternative routes for San Francisco to Boston

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

Top 7 airlines flying from San Francisco to Boston

The chart below displays the airlines Cheapflights users traveling from San Francisco to Boston choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$99Average$257FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
Alaska AirlinesCheapest$129Average$383FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapest$152Average$380FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Sun Country AirCheapest$157Average$370FlexibilityNo cancel feeOn-time83%
Search Sun Country Air flights
American AirlinesCheapest$163Average$470FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$170Average$450FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
JetBlueCheapest$171Average$413FlexibilityNo cancel feeOn-time62%
Search JetBlue flights

Hourly flight availability from San Francisco to Boston

See what time of day planes typically take off from San Francisco to Boston
11%of flight departuresEarly morningMidnight to 6 am
35%of flight departuresMorning6 am to noon
18%of flight departuresAfternoonNoon to 6 pm
36%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from San Francisco to Boston

See how many times per day planes take to the skies headed from San Francisco to Boston
Sunday49daily flights
Monday46daily flights
Tuesday46daily flights
Wednesday48daily flights
Thursday45daily flights
Friday49daily flights
Saturday35daily flights
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