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Cheap flights from Boston to San Francisco 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 14/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
31 Mar — 7 Apr1
1 adult

Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in September or January, booked 78 days in advance, depart on a Thursday or Friday and return on a Monday

Cheap flight deals from Boston to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to San Francisco (SFO). 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 26 March 2025.

Round-trip from

C$ 309

One-way from

C$ 163

Popular in

June

Cheapest in

September

Average price

C$ 506

Good round-trip deal

C$ 367 or less
Alaska Airlines
  • Alaska Airlines
  • 8/5-3/6
  • 2 total stops
  • 31h 24m total
  • Boston to San Francisco
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Southwest
  • Southwest
  • 14/4
  • 1 total stop
  • 11h 25m total
  • Boston to San Francisco
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Highest demand for flights based on searches. 7% potential increase in price (C$ 62 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Boston Logan Intl to San Francisco.
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Find flight deals from Boston to San Francisco

Cheapest flights from Boston to San Francisco
Explore the most affordable flight options available from Boston to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 March 2025.

Thu 8/54:34 p.m.BOS - SFO
1 stop10h 08mAlaska Airlines
Tue 3/67:24 a.m.SFO - BOS
1 stop21h 16mAlaska Airlines
Deal found 26/3C$ 309
Wed 2/45:00 a.m.BOS - SFO
1 stop8h 15mSouthwest
Wed 9/46:00 a.m.SFO - BOS
2 stops10h 10mSouthwest
Deal found 25/3C$ 318
Thu 1/57:49 p.m.BOS - SFO
Nonstop6h 52mDelta
Sun 4/510:05 p.m.SFO - BOS
Nonstop5h 40mDelta
Deal found 26/3C$ 326
Mon 5/58:19 p.m.BOS - SFO
Nonstop6h 46mJetBlue
Sat 10/51:20 p.m.SFO - BOS
1 stop7h 57mJetBlue
Deal found 25/3C$ 338
Sat 26/47:47 p.m.BOS - SFO
Nonstop6h 47mHawaiian Airlines
Mon 28/48:09 p.m.SFO - BOS
1 stop8h 46mHawaiian Airlines
Deal found 25/3C$ 339
Mon 5/56:00 a.m.BOS - SFO
1 stop8h 36mUnited Airlines
Sat 10/56:45 a.m.SFO - BOS
1 stop7h 38mUnited Airlines
Deal found 25/3C$ 353
Wed 9/411:38 a.m.BOS - SFO
1 stop8h 22mSun Country Air
Fri 11/46:11 p.m.SFO - BOS
1 stop13h 31mSun Country Air
Deal found 25/3C$ 493

Cheapflights Fare Finder

Customize your flight search to find flights from Boston to San Francisco 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 26 March 2025.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.

Fly from

Boston

Fly to

San Francisco

Route

Depart

Return

Price

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 8/5

4:34 p.m.-11:42 p.m.

1 stop10h 08m

San Francisco

Tue 3/6

7:24 a.m.-7:40 a.m.

1 stop21h 16m

C$ 309

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Tue 8/4

5:00 a.m.-10:05 a.m.

1 stop8h 05m

San Francisco

Wed 9/4

6:00 a.m.-7:10 p.m.

2 stops10h 10m

C$ 318

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Thu 1/5

7:49 p.m.-11:41 p.m.

Nonstop6h 52m

San Francisco

Sun 4/5

10:05 p.m.-6:45 a.m.

Nonstop5h 40m

C$ 326

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 5/5

8:19 p.m.-12:05 a.m.

Nonstop6h 46m

San Francisco

Sat 10/5

1:20 p.m.-12:17 a.m.

1 stop7h 57m

C$ 338

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 26/4

7:47 p.m.-11:34 p.m.

Nonstop6h 47m

San Francisco

Mon 28/4

8:09 p.m.-7:55 a.m.

1 stop8h 46m

C$ 339

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 5/5

6:00 a.m.-11:36 a.m.

1 stop8h 36m

San Francisco

Sat 10/5

6:45 a.m.-5:23 p.m.

1 stop7h 38m

C$ 353

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 9/4

11:38 a.m.-5:00 p.m.

1 stop8h 22m

San Francisco

Fri 11/4

6:11 p.m.-10:42 a.m.

1 stop13h 31m

C$ 493

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Mon 14/4

5:45 a.m.-2:10 p.m.

1 stop11h 25m

C$ 163

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Wed 14/5

7:00 a.m.-3:53 p.m.

1 stop11h 53m

C$ 169

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

Sat 17/5

9:20 p.m.-1:02 a.m.

Nonstop6h 42m

C$ 170

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/3

Showing 1-10 of 15 results
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Best time to book a flight from Boston to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Boston 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 Boston to San Francisco

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to San Francisco. Price data was last updated on 21 March 2025.

To ensure you get the cheapest price possible for a flight from Boston to San Francisco, you should look to book at least 78 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 276). Flying from Boston to San Francisco in June is currently the most expensive (average of C$ 379). 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 BOS to SFO?

Find hourly flight availability from Boston to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 March 2025.

When flying from Boston to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 48% versus a flight at noon.

Weekly flight availability from Boston to San Francisco

Explore weekly flight availability from Boston to San Francisco. 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 26 March 2025.

The most flights from BOS to SFO are scheduled on a Monday (39 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in San Francisco by month

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

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Temperature in San Francisco by month

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

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 San Francisco. Reviews last updated 26 March 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Boston to San Francisco. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,331 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,273 reviews
Check prices

Entertainment

7.6

Crew

8.6

Overall

8.1

Boarding

8.2

Comfort

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Related info for your journey

Find useful and relevant information for your journey from Boston to San Francisco. 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 Boston to San Francisco?

    If you wish to fly to San Francisco from Boston, then you need to book flights from Boston Logan Intl to San Francisco. There are 28 flights from Logan Intl (BOS) to San Francisco (SFO) per day to choose from. Flights to San Francisco from Logan Intl are available from 2 different airlines, which means you should have some options if you want to compare airfare deals. 6h 52m is how long a nonstop flight from Boston to San Francisco typically takes.

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

    Flights from Boston Logan Intl to San Francisco have been viewed 10 times in the past calendar month.

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

    Cheapflights users have booked flights from Boston to San Francisco round-trip from C$ 309. Other airlines that can offer you cheap pricing are Southwest, from C$ 318, and Delta, from C$ 326. Alaska Airlines is 40% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Boston to San Francisco are Southwest (C$ 163), Alaska Airlines (C$ 169), and JetBlue (C$ 170).

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

    No one likes to see their flight delayed. When booking a flight from Boston to San Francisco consider choosing Air China (100%), ANA (90%) or Air New Zealand (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Boston to San Francisco?

    On average you can expect to pay C$ 905 for a flight from Boston to San Francisco. The cheapest flight overall is C$ 183 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at C$ 319.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to San Francisco 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 Boston to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of C$ 276). Flying from Boston to San Francisco in June is currently the most expensive (average of C$ 379). 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
Richmond
San Ramon
Newark
Alameda
Burlingame
Redwood City
South San Francisco
San Bruno
Scotts Valley
Novato
Belmont
Millbrae
Santa Clara
Vallejo

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Alternative routes for Boston to San Francisco

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

Top 2 airlines flying from Boston to San Francisco

Discover the top 2 airlines that operate flights from Boston to San Francisco. 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 629,999 searches. Data last updated 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapestC$ 281AverageC$ 552FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapestC$ 282AverageC$ 365FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

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 Boston to San Francisco?

When you search for this flight from Boston to San Francisco, 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 Boston to San Francisco?

Cheapflights helps you find that perfect flight to San Francisco from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Boston to San Francisco, users can toggle the no change fees filter when performing a flight search.

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

Not ready to book yet? You can track prices for flights from Boston to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

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