Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from San Francisco to Boston from $186

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 64 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from San Francisco to Boston

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 30 April 2025.

Round-trip from

$368

One-way from

$186

Popular in

June

Cheapest in

January

Average price

$629
Alaska Airlines
  • Alaska Airlines
  • 21/5-28/5
  • 2 total stops
  • 18h 56m total
  • San Francisco to Boston
Search Deals
JetBlue
  • JetBlue
  • 20/5
  • Nonstop
  • 5h 45m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($125 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from San Francisco to Boston

Cheapest flights from San Francisco to Boston
Explore the most affordable flight options available from San Francisco to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Wed 21/506:00SFO - BOS
1 stop8h 52mAlaska Airlines
Wed 28/516:49BOS - SFO
1 stop10h 04mAlaska Airlines
Deal found 29/4$368
Sat 24/520:47SFO - BOS
Nonstop5h 53mHawaiian Airlines
Tue 27/507:00BOS - SFO
Nonstop6h 49mHawaiian Airlines
Deal found 29/4$378
Wed 28/506:00SFO - BOS
Nonstop5h 45mJetBlue
Wed 4/615:10BOS - SFO
1 stop9h 18mJetBlue
Deal found 29/4$384
Wed 4/607:00SFO - BOS
Nonstop5h 45mDelta
Mon 9/620:31BOS - SFO
Nonstop6h 52mDelta
Deal found 29/4$387
Mon 19/500:10SFO - BOS
1 stop7h 28mUnited Airlines
Wed 21/514:00BOS - SFO
Nonstop6h 44mUnited Airlines
Deal found 29/4$429
Sat 6/909:55SFO - BOS
1 stop8h 35mSouthwest
Tue 9/907:05BOS - SFO
1 stop10h 35mSouthwest
Deal found 29/4$436

Cheapflights Fare Finder

Customise your flight search to find flights from San Francisco to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 30 April 2025.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.

Fly from

San Francisco

Fly to

Boston

Route

Depart

Return

Price

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 21/5

06:00-17:52

1 stop8h 52m

Boston Logan Intl

Wed 28/5

16:49-23:53

1 stop10h 04m

$368

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 24/5

20:47-05:40

Nonstop5h 53m

Boston Logan Intl

Tue 27/5

07:00-10:49

Nonstop6h 49m

$378

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 28/5

06:00-14:45

Nonstop5h 45m

Boston Logan Intl

Wed 4/6

15:10-21:28

1 stop9h 18m

$384

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 4/6

07:00-15:45

Nonstop5h 45m

Boston Logan Intl

Mon 9/6

20:31-00:23

Nonstop6h 52m

$387

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 19/5

00:10-10:38

1 stop7h 28m

Boston Logan Intl

Wed 21/5

14:00-17:44

Nonstop6h 44m

$429

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 6/9

09:55-21:30

1 stop8h 35m

Boston Logan Intl

Tue 9/9

07:05-14:40

1 stop10h 35m

$436

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 20/5

06:00-14:45

Nonstop5h 45m

$186

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 19/5

21:59-07:40

1 stop30h 41m

$198

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 20/5

11:30-00:06

1 stop9h 36m

$200

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 11/6

19:05-06:01

1 stop7h 56m

$201

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 13 results
1
2

Best time to book a flight from San Francisco to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from San Francisco with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Boston

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

Use this chart to determine the optimal time to book a return flight from San Francisco to Boston. Price data was last updated on 25 April 2025.

The best time to book flights from San Francisco to Boston is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Francisco to Boston?

Currently, February is the cheapest month in which you can book a flight from San Francisco to Boston (average of $1,183). Flying from San Francisco to Boston in December is currently the most expensive (average of $1,631). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to BOS?

Find hourly flight availability from San Francisco to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 April 2025.

It’s optimal to fly from San Francisco to Boston at midday. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight in the afternoon.

Weekly flight availability from San Francisco to Boston

Explore weekly flight availability from San Francisco to Boston. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 30 April 2025.

The most flights from SFO to BOS are scheduled on a Tuesday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boston ranges from 78.0 - 101.0 inches per month. March is typically the wettest month, when rainfall can reach 101.0 mm. July is typically the driest time to visit Boston when rainfall is around 78.0 mm.

Temperature in Boston by month

Plan your trip to Boston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated 30 April 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from San Francisco to Boston by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
9,968 reviews
Check prices

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very Good
9,968 reviews
Alaska Airlines
8.0
Very Good
9,968 reviews
Check prices

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very Good
4,294 reviews
Alaska Airlines
8.0
Very Good
9,968 reviews
Check prices

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very Good
7,936 reviews
Alaska Airlines
8.0
Very Good
9,968 reviews
Check prices

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,406 reviews
Alaska Airlines
8.0
Very Good
9,968 reviews
Check prices

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very Good
9,968 reviews
Check prices

Food

7.1

Entertainment

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    Booking a flight from San Francisco (SFO) to Boston Logan Intl (BOS) is your only option if you wish to fly from San Francisco to Boston. On a typical day, there are 21 flights from San Francisco to Logan Intl, all of which are around 5h 53m for a nonstop flight. You can also purchase a plane ticket from 1 airline when you book a flight from San Francisco to Boston.

  • How popular is this San Francisco to Boston flight route?

    The San Francisco to Boston Logan Intl flight path was viewed by 9 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from San Francisco to Boston round-trip?

    Currently priced at $368, Alaska Airlines will fly you from San Francisco to Boston and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Hawaiian Airlines and JetBlue - these airlines can fly you to your destination from $378 and $384, respectively. Alaska Airlines is 37% 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?

    The cheapet airlines for a one-way flight from San Francisco to Boston are JetBlue ($186), Alaska Airlines ($198), and Hawaiian Airlines ($200).

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

    No one likes to see their flight delayed. When booking a flight from San Francisco to Boston consider choosing American Airlines(100%), Qatar Airways(100%) or Fiji Airways(100%), as they are the most reliable in getting you off to your destination on time.

  • Can I find deals for flights from San Francisco to Boston that include hotel bookings?

    Yes. In addition to deals on San Francisco to Boston flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Boston.

  • Can I find deals for business class flights from San Francisco to Boston?

    Yes. Cheapflights offers flight deals from San Francisco to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Boston?

    Currently, February is the cheapest month in which you can book a flight from San Francisco to Boston (average of $1,183). Flying from San Francisco to Boston in December is currently the most expensive (average of $1,631). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Revere

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Boston

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Boston flights

Top airline flying from San Francisco to Boston

Discover the top airline that operate flights from San Francisco to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$291Average$447FlexibilityNo cancel feeOn-time62%
Search JetBlue flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Boston?

When you search for this flight from San Francisco to Boston, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Boston?

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to Boston for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from San Francisco to Boston with no change fees?

Certainly. Search results for flights to Boston from San Francisco shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from San Francisco to Boston become cheaper?

Yes, Cheapflights offers price alerts on San Francisco to Boston flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2025 Cheapflights