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Cheap flights from San Francisco to Boston from C$ 163

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
25 Feb — 4 Mar1
1 adult

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 20 February 2025.

Round-trip from

C$ 288

One-way from

C$ 163

Popular in

June

Cheapest in

January

Average price

C$ 460
Alaska Airlines
  • Alaska Airlines
  • 3/4-7/4
  • Nonstop
  • 12h 41m total
  • San Francisco to Boston
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United Airlines
  • United Airlines
  • 2/3
  • 1 total stop
  • 8h 50m total
  • San Francisco to Boston
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Highest demand for flights based on searches. 12% potential increase in price (C$ 111 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 20 February 2025.

Thu 3/47:44 a.m.SFO - BOS
Nonstop5h 43mAlaska Airlines
Mon 7/47:59 p.m.BOS - SFO
Nonstop6h 58mAlaska Airlines
Deal found 19/2C$ 288
Mon 3/37:30 p.m.SFO - BOS
1 stop8h 50mUnited Airlines
Thu 6/38:00 a.m.BOS - SFO
Nonstop6h 55mUnited Airlines
Deal found 20/2C$ 290
Fri 7/37:30 a.m.SFO - BOS
Nonstop5h 40mDelta
Thu 20/37:50 a.m.BOS - SFO
Nonstop7h 00mDelta
Deal found 20/2C$ 294
Wed 12/311:59 p.m.SFO - BOS
Nonstop5h 30mJetBlue
Thu 13/310:54 a.m.BOS - SFO
1 stop11h 39mJetBlue
Deal found 19/2C$ 314
Thu 27/25:00 a.m.SFO - BOS
1 stop7h 30mSouthwest
Wed 5/32:05 p.m.BOS - SFO
2 stops11h 10mSouthwest
Deal found 20/2C$ 443
Fri 23/58:47 p.m.SFO - BOS
Nonstop5h 53mHawaiian Airlines
Wed 28/57:59 p.m.BOS - SFO
Nonstop6h 45mHawaiian Airlines
Deal found 19/2C$ 514

Find flights from San Francisco to Boston within your budget

Customize 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 629,999 searches. Data last updated 20 February 2025.

Fly from

San Francisco

Fly to

Boston

Route

Depart

Return

Price

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 3/4

7:44 a.m.-4:27 p.m.

Nonstop5h 43m

Boston Logan Intl

Mon 7/4

7:59 p.m.-11:57 p.m.

Nonstop6h 58m

C$ 288

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 3/3

7:30 p.m.-7:20 a.m.

1 stop8h 50m

Boston Logan Intl

Thu 6/3

8:00 a.m.-11:55 a.m.

Nonstop6h 55m

C$ 290

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 7/3

7:30 a.m.-4:10 p.m.

Nonstop5h 40m

Boston Logan Intl

Thu 20/3

7:50 a.m.-11:50 a.m.

Nonstop7h 00m

C$ 294

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 12/3

11:59 p.m.-8:29 a.m.

Nonstop5h 30m

Boston Logan Intl

Thu 13/3

10:54 a.m.-7:33 p.m.

1 stop11h 39m

C$ 314

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 22/4

10:40 a.m.-10:30 p.m.

1 stop8h 50m

Boston Logan Intl

Tue 29/4

2:05 p.m.-8:55 p.m.

2 stops9h 50m

C$ 455

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 23/5

8:47 p.m.-5:40 a.m.

Nonstop5h 53m

Boston Logan Intl

Wed 28/5

7:59 p.m.-11:44 p.m.

Nonstop6h 45m

C$ 514

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 2/3

7:30 p.m.-7:20 a.m.

1 stop8h 50m

C$ 163

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 9/3

7:55 p.m.-7:44 a.m.

1 stop8h 49m

C$ 168

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 6/5

7:05 a.m.-3:40 p.m.

Nonstop5h 35m

C$ 176

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 19/5

7:49 p.m.-7:20 a.m.

1 stop8h 31m

C$ 196

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

Showing 1-10 of 13 results
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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 round-trip 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.

Travel insights for flights from San Francisco to Boston

Get recent, data-driven insights about flights from San Francisco to Boston including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Boston. Price data was last updated on 14 February 2025.

Booking 79 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 298). Flying from San Francisco to Boston in April is currently the most expensive (average of C$ 350). 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 20 February 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 48% on flights from San Francisco to Boston by exploring options for tickets in the morning.

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 20 February 2025.

The most flights from SFO to BOS are scheduled on a Thursday (42 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (17 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 mm 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 20 February 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from San Francisco to Boston to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews
Check prices

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews
Check prices

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews
Check prices

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews
Check prices

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews
Check prices

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews
Check prices

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

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.

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

    Flights from San Francisco to Boston Logan Intl have been viewed 4 times in the past calendar month.

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

    Our cheapest airline available from San Francisco to Boston is Alaska Airlines. Our recent data shows that you can find tickets from as low as C$ 288 on this airline. Additional options worth looking into are United Airlines and Delta, starting at C$ 290 and C$ 294 round-trip. These flights start at 46% lower than the current average price 3 months from now.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as C$ 163. Users have also found prices from C$ 168 and C$ 176 on Alaska Airlines and JetBlue, respectively.

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

    Consider Etihad Airways (100%), Virgin Atlantic (97%) or EL AL (94%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Boston.

  • 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 vacation 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, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 298). Flying from San Francisco to Boston in April is currently the most expensive (average of C$ 350). 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
Seekonk
Warwick
Waltham
Medford
Braintree
Somerville
Dedham
Rockland
Chelsea
Plymouth
Quincy
Old Orchard Beach
Revere
Hampton
Lynn
Andover
Watertown
Kennebunk
Amherst
Sturbridge

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers 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?

Deals for San Francisco to Boston flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Francisco to Boston for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from San Francisco to Boston with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from San Francisco to Boston and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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