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Cheap flights from San Francisco to Boston from C$ 180

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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
17 Jun — 24 Jun1
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 Monday and return on a Thursday

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 12 June 2025.

Round-trip from

C$ 353

One-way from

C$ 180

Popular in

December

Cheapest in

January

Average price

C$ 611
Alaska Airlines
  • Alaska Airlines
  • 25/8-3/9
  • 1 total stop
  • 15h 13m total
  • San Francisco to Boston
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Alaska Airlines
  • Alaska Airlines
  • 8/7
  • 1 total stop
  • 10h 39m total
  • San Francisco to Boston
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in June 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 12 June 2025.

Mon 25/86:10 a.m.SFO - BOS
Nonstop5h 50mAlaska Airlines
Wed 3/94:00 p.m.BOS - SFO
1 stop9h 23mAlaska Airlines
Deal found 9/6C$ 353
Mon 7/76:05 a.m.SFO - BOS
Nonstop5h 45mJetBlue
Tue 15/79:19 p.m.BOS - SFO
Nonstop6h 40mJetBlue
Deal found 9/6C$ 354
Sun 13/710:00 p.m.SFO - BOS
Nonstop5h 40mDelta
Wed 23/78:47 p.m.BOS - SFO
Nonstop6h 47mDelta
Deal found 10/6C$ 366
Mon 25/85:15 p.m.SFO - BOS
2 stops11h 55mSouthwest
Fri 29/86:40 a.m.BOS - SFO
1 stop9h 40mSouthwest
Deal found 11/6C$ 388
Fri 15/812:30 a.m.SFO - BOS
1 stop8h 57mUnited Airlines
Sat 23/86:02 a.m.BOS - SFO
Nonstop6h 31mUnited Airlines
Deal found 10/6C$ 474
Fri 18/711:59 p.m.SFO - BOS
1 stop7h 38mSun Country Air
Mon 21/76:30 a.m.BOS - SFO
1 stop19h 23mSun Country Air
Deal found 11/6C$ 506

Cheapflights Fare Finder

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 12 June 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

Mon 25/8

6:10 a.m.-3:00 p.m.

Nonstop5h 50m

Boston Logan Intl

Wed 3/9

4:00 p.m.-10:23 p.m.

1 stop9h 23m

C$ 353

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 7/7

6:05 a.m.-2:50 p.m.

Nonstop5h 45m

Boston Logan Intl

Tue 15/7

9:19 p.m.-12:59 a.m.

Nonstop6h 40m

C$ 354

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sun 13/7

10:00 p.m.-6:40 a.m.

Nonstop5h 40m

Boston Logan Intl

Wed 23/7

8:47 p.m.-12:34 a.m.

Nonstop6h 47m

C$ 366

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Mon 25/8

5:15 p.m.-8:10 a.m.

2 stops11h 55m

Boston Logan Intl

Fri 29/8

6:40 a.m.-1:20 p.m.

1 stop9h 40m

C$ 388

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 15/8

12:30 a.m.-12:27 p.m.

1 stop8h 57m

Boston Logan Intl

Sat 23/8

6:02 a.m.-9:33 a.m.

Nonstop6h 31m

C$ 474

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 9/8

9:28 p.m.-6:10 a.m.

Nonstop5h 42m

Boston Logan Intl

Sat 16/8

8:19 p.m.-11:59 p.m.

Nonstop6h 40m

C$ 496

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 18/7

11:59 p.m.-10:37 a.m.

1 stop7h 38m

Boston Logan Intl

Mon 21/7

6:30 a.m.-10:53 p.m.

1 stop19h 23m

C$ 506

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 8/7

5:51 p.m.-7:30 a.m.

1 stop10h 39m

C$ 180

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 13/8

5:25 p.m.-8:10 a.m.

2 stops11h 45m

C$ 183

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 5/8

6:50 p.m.-7:33 a.m.

1 stop9h 43m

C$ 185

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 15 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.

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 round-trip flight from San Francisco to Boston. Price data was last updated on 9 June 2025.

Booking 64 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, May is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 291). 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 12 June 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 54% 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 12 June 2025.

The most flights from SFO to BOS are scheduled on a Thursday (63 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (22 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 12 June 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Entertainment

7.1

Boarding

8.1

Overall

8.0

Comfort

7.8

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.

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

    Flights from San Francisco to Boston Logan Intl have been viewed 7 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$ 353 on this airline. Additional options worth looking into are JetBlue and Delta, starting at C$ 354 and C$ 366 round-trip. These flights start at 30% 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 Alaska Airlines. According to our data, you can fly for as low as C$ 180. Users have also found prices from C$ 183 and C$ 185 on Southwest and United Airlines, respectively.

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

    Consider Qatar Airways (92%), Etihad Airways (91%) or American Airlines (89%) 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, May is the cheapest month in which you can book a flight from San Francisco to Boston (average of C$ 291). 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
Waltham
Medford
Braintree
Somerville
Dedham
Rockland
Chelsea
Warwick
Milford
Plymouth
Quincy
Old Orchard Beach
Revere
Hampton
Lynn
Merrimack
Andover
Watertown
Kennebunk

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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.

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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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