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Cheap flights from San Francisco to Boston from C$ 178

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
2 Aug — 9 Aug1
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 28 July 2025.

Round-trip from

C$ 338

One-way from

C$ 178

Popular in

December

Cheapest in

January

Average price

C$ 593
United Airlines
  • United Airlines
  • 9/9-15/10
  • 1 total stop
  • 14h 26m total
  • San Francisco to Boston
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Hawaiian Airlines
  • Hawaiian Airlines
  • 4/9
  • Nonstop
  • 5h 50m total
  • San Francisco to Boston
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Highest demand for flights based on searches. 1% potential increase in price (C$ 8 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 28 July 2025.

Tue 9/99:15 p.m.SFO - BOS
Nonstop5h 46mUnited Airlines
Wed 15/107:30 a.m.BOS - SFO
1 stop8h 40mUnited Airlines
Deal found 28/7C$ 338
Sat 6/910:00 p.m.SFO - BOS
Nonstop5h 39mJetBlue
Fri 19/96:15 a.m.BOS - SFO
Nonstop6h 32mJetBlue
Deal found 28/7C$ 340
Sat 13/96:00 a.m.SFO - BOS
1 stop8h 55mAlaska Airlines
Sat 20/96:55 p.m.BOS - SFO
1 stop17h 17mAlaska Airlines
Deal found 28/7C$ 351
Thu 4/97:05 a.m.SFO - BOS
Nonstop5h 50mDelta
Mon 22/98:45 p.m.BOS - SFO
Nonstop6h 36mDelta
Deal found 28/7C$ 355
Wed 8/107:11 a.m.SFO - BOS
Nonstop5h 49mHawaiian Airlines
Wed 15/108:25 p.m.BOS - SFO
Nonstop6h 40mHawaiian Airlines
Deal found 27/7C$ 359
Tue 11/117:10 p.m.SFO - BOS
2 stops10h 05mSouthwest
Sun 16/116:10 a.m.BOS - SFO
1 stop10h 55mSouthwest
Deal found 27/7C$ 389

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 28 July 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

Tue 9/9

9:15 p.m.-6:01 a.m.

Nonstop5h 46m

Boston Logan Intl

Wed 15/10

7:30 a.m.-1:10 p.m.

1 stop8h 40m

C$ 338

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 6/9

10:00 p.m.-6:39 a.m.

Nonstop5h 39m

Boston Logan Intl

Fri 19/9

6:15 a.m.-9:47 a.m.

Nonstop6h 32m

C$ 340

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 13/9

6:00 a.m.-5:55 p.m.

1 stop8h 55m

Boston Logan Intl

Sat 20/9

6:55 p.m.-9:12 a.m.

1 stop17h 17m

C$ 351

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Wed 8/10

7:11 a.m.-4:00 p.m.

Nonstop5h 49m

Boston Logan Intl

Wed 15/10

8:25 p.m.-12:05 a.m.

Nonstop6h 40m

C$ 359

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Tue 11/11

7:10 p.m.-8:15 a.m.

2 stops10h 05m

Boston Logan Intl

Sun 16/11

6:10 a.m.-2:05 p.m.

1 stop10h 55m

C$ 389

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Sat 6/9

8:55 a.m.-11:56 p.m.

1 stop12h 01m

Boston Logan Intl

Sat 13/9

7:55 a.m.-11:33 a.m.

Nonstop6h 38m

C$ 399

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 4/9

3:10 p.m.-11:56 p.m.

Nonstop5h 46m

C$ 178

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 5/9

6:00 a.m.-5:55 p.m.

1 stop8h 55m

C$ 190

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Thu 18/9

7:10 a.m.-6:25 a.m.

1 stop20h 15m

C$ 199

San FranciscoBoston

SFO - BOS

SFOBOS

San Francisco

Fri 26/9

9:51 p.m.-6:35 a.m.

Nonstop5h 44m

C$ 204

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

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 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 25 July 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 28 July 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 28 July 2025.

The most flights from SFO to BOS are scheduled on a Monday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (54 on average).

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 28 July 2025.
Read through reviews of airlines operating flights from San Francisco to Boston, such as Alaska Airlines,Southwest, andDelta. 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

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,892 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 United Airlines. Our recent data shows that you can find tickets from as low as C$ 338 on this airline. Additional options worth looking into are JetBlue and Alaska Airlines, starting at C$ 340 and C$ 351 round-trip. These flights start at 33% 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 Hawaiian Airlines. According to our data, you can fly for as low as C$ 178. Users have also found prices from C$ 192 and C$ 204 on Alaska Airlines and Delta, respectively.

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

    Consider Etihad Airways (95%), Scandinavian Airlines (89%) or Air China (88%) 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 Boston?

Book flights to Boston if you plan to visit one of these locations
Medford
Braintree
Waltham
Somerville
Rockland
Chelsea
Warwick
Milford
Plymouth
Quincy
Old Orchard Beach
Revere
Hampton
Lynn
Merrimack
Andover
Watertown
Kennebunk
Amherst
Seekonk

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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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