HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Francisco Bay Area

$109+ Cheap flights from Boston (BOS) to San Francisco Bay Area

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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
ago. 25 — sep. 11
lun. 8/25
lun. 9/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to San Francisco Bay Area with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boston to San Francisco Bay Area

Keep the following information in mind while searching for Boston to San Francisco Bay Area flight deals. Data was last updated agosto 20, 2025.

Round-trip from

$178
(Mytrip)

One-way from

$109
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$388
From Boston Logan Intl to San Francisco Bay Area
Search Deals
One-way flight from Boston Logan Intl to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Boston to San Francisco Bay Area

Cheapest flights from Boston to San Francisco Bay Area
Explore the most affordable flight options available from Boston to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 20, 2025.

This Mytrip deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/95:50 amBOS - SJC
2 stops17h 10mSpirit Airlines
mié. 9/1011:40 amSJC - BOS
2 stops20h 33mSpirit Airlines
Deal found 8/18$178
This Mytrip deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/105:50 amBOS - SJC
2 stops17h 10mSpirit Airlines
mié. 9/1711:40 amSJC - BOS
2 stops20h 33mSpirit Airlines
Deal found 8/17$194
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/42:18 pmBOS - SJC
2 stops23h 27mSpirit Airlines
lun. 9/84:16 pmSJC - BOS
2 stops15h 57mSpirit Airlines
Deal found 8/19$203
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/42:18 pmBOS - OAK
3 stops22h 43mSpirit Airlines
mar. 9/92:39 pmOAK - BOS
2 stops17h 34mSpirit Airlines
Deal found 8/19$229
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/155:50 amBOS - SJC
2 stops31h 55mSpirit Airlines
mié. 9/1711:40 amSJC - BOS
2 stops20h 33mSpirit Airlines
Deal found 8/19$235
This Alaska Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/238:23 pmBOS - SFO
Nonstop6h 29mAlaska Airlines
mar. 9/306:10 amSFO - BOS
Nonstop5h 50mAlaska Airlines
Deal found 8/20$237
This Delta deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/136:40 pmBOS - SFO
Nonstop6h 37mDelta
sáb. 9/207:05 amSFO - BOS
Nonstop5h 42mDelta
Deal found 8/20$238
This Expedia deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/1210:53 amBOS - SFO
1 stop13h 28mMultiple Airlines
dom. 9/146:10 amSFO - BOS
Nonstop5h 50mMultiple Airlines
Deal found 8/19$239
This Mytrip deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/122:53 pmBOS - SJC
3 stops32h 07mSpirit Airlines
mar. 9/1611:40 amSJC - BOS
2 stops20h 33mSpirit Airlines
Deal found 8/19$241
This Frontier deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/138:38 amBOS - SFO
1 stop15h 43mFrontier
mié. 9/177:10 amSFO - BOS
2 stops22h 33mFrontier
Deal found 8/18$241
This Trip.com deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/97:45 amBOS - SFO
1 stop8h 27mHawaiian Airlines
mar. 9/166:10 amSFO - BOS
Nonstop5h 50mHawaiian Airlines
Deal found 8/19$242
This Cheapflightsfares deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/198:23 pmBOS - SFO
Nonstop6h 29mHawaiian Airlines
mar. 9/236:10 amSFO - BOS
Nonstop5h 50mHawaiian Airlines
Deal found 8/20$243

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to San Francisco Bay Area 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 2,558,603 searches. Data last updated agosto 20, 2025.
Use the filters below to find and compare flights from Boston to San Francisco Bay Area that are best for you.

Fly from

Boston

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

BostonSan Jose

BOS - SJC

BOSSJC

Boston Logan Intl

mar. 9/9

5:50 am-8:00 pm

2 stops17h 10m

San Jose

mié. 9/10

11:40 am-11:13 am

2 stops20h 33m

$178

BostonSan Jose

BOS - SJC

BOSSJC

Boston Logan Intl

mié. 9/10

5:50 am-8:00 pm

2 stops17h 10m

San Jose

mié. 9/17

11:40 am-11:13 am

2 stops20h 33m

$194

BostonSan Jose

BOS - SJC

BOSSJC

Boston Logan Intl

jue. 9/4

2:18 pm-10:45 am

2 stops23h 27m

San Jose

lun. 9/8

4:16 pm-11:13 am

2 stops15h 57m

$203

BostonSan Jose

BOS - SJC

BOSSJC

Boston Logan Intl

mié. 1/14

9:58 am-6:38 pm

1 stop11h 40m

San Jose

mié. 1/21

5:53 am-7:00 pm

1 stop10h 07m

$227

BostonOakland

BOS - OAK

BOSOAK

Boston Logan Intl

jue. 9/4

2:18 pm-10:01 am

3 stops22h 43m

Oakland

mar. 9/9

2:39 pm-11:13 am

2 stops17h 34m

$229

BostonSan Jose

BOS - SJC

BOSSJC

Boston Logan Intl

lun. 9/15

5:50 am-10:45 am

2 stops31h 55m

San Jose

mié. 9/17

11:40 am-11:13 am

2 stops20h 33m

$235

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

vie. 9/5

8:23 pm-11:52 pm

Nonstop6h 29m

San Francisco

mar. 9/16

6:10 am-3:00 pm

Nonstop5h 50m

$247

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

sáb. 11/8

7:00 am-10:50 am

Nonstop6h 50m

San Francisco

dom. 11/16

12:00 pm-8:34 pm

Nonstop5h 34m

$247

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

mié. 9/3

6:45 pm-10:41 pm

Nonstop6h 56m

San Francisco

mar. 9/16

9:51 pm-6:35 am

Nonstop5h 44m

$247

BostonSan Francisco

BOS - SFO

BOSSFO

Boston Logan Intl

mié. 9/24

10:30 am-2:01 pm

Nonstop6h 31m

San Francisco

sáb. 10/4

11:00 pm-9:57 am

1 stop7h 57m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Boston to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area 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 Bay Area

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

Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco Bay Area (average of $276). Flying from Boston to San Francisco Bay Area in June is currently the most expensive (average of $358). 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 XIH?

Find hourly flight availability from Boston to San Francisco Bay Area. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 20, 2025.

When flying from Boston to San Francisco Bay Area, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Boston to San Francisco Bay Area

Explore weekly flight availability from Boston to San Francisco Bay Area. 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 agosto 20, 2025.

The most flights from BOS to zzXIH are scheduled on a Wednesday (52 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (34 on average).

Reviews of airlines servicing San Francisco Bay Area

Get insights into the airlines that provide service to San Francisco Bay Area. 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 Bay Area. Reviews last updated agosto 20, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Boston to San Francisco Bay Area have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
United Airlines
7.4
Good
8,928 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
JetBlue
7.2
Good
2,916 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.

Related info for your journey

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

  • What airport do you fly from for flights from Boston to San Francisco Bay Area?

    If you book a flight to San Francisco Bay Area from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston.

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

    This flight path from Boston Logan Intl to San Francisco Bay Area was viewed by 60 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Boston to San Francisco Bay Area?

    Departing from Boston to San Francisco Bay Area will take you 6h 29m. The distance from Boston to San Francisco Bay Area is about 2696 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    One-way options have recently been found by users for as low as $109 on United Airlines. Other airlines that offer cheap prices include Spirit Airlines from $118 and Alaska Airlines from $125 one-way.

  • What are the most popular routes from Boston to San Francisco Bay Area?

    The most popular flight routes from Boston to San Francisco Bay Area are Boston Logan Intl - San Francisco, Boston Logan Intl - San Jose and Boston Logan Intl - Oakland.

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

    No one likes to see their flight delayed. When booking a flight from Boston to San Francisco Bay Area consider choosing Etihad Airways (86%), Japan Airlines (85%) or Icelandair (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 Bay Area?

    On average you can expect to pay $886 for a flight from Boston to San Francisco Bay Area. The cheapest flight overall is $119 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at $224.

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

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

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

    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 Bay Area.

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

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

    Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco Bay Area (average of $276). Flying from Boston to San Francisco Bay Area in June is currently the most expensive (average of $358). 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

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 Boston to San Francisco Bay Area

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
Boston to San Francisco flights
Boston to San Diego flights
Hartford to Las Vegas flights
Boston to Santa Ana flights
Boston to Ontario flights
Boston to Burbank flights
Hartford to Los Angeles flights
Albany to Las Vegas flights
Boston to San Jose flights
Hartford to San Francisco flights
Boston to Sacramento flights
Boston to Reno flights
Hartford to San Diego flights
Boston to Palm Springs flights
Boston to Oakland flights
Boston to Santa Barbara flights
Hartford to Ontario flights
Hartford to Long Beach flights
Albany to San Francisco flights
Albany to San Diego flights
Albany to Los Angeles flights
Hartford to Santa Ana flights
Boston to Fresno flights
West Tisbury to Las Vegas flights
Hyannis to Las Vegas flights
Hartford to Reno flights
Hartford to San Jose flights
Hartford to Oakland flights
Albany to Ontario flights
Hartford to Burbank flights
Boston to San Luis Obispo flights
Hartford to Sacramento flights
Boston to Santa Rosa flights
Worcester to Las Vegas flights
Albany to Santa Ana flights
Hartford to Fresno flights
Boston to Long Beach flights
Albany to Burbank flights
Hartford to Palm Springs flights
Boston to Monterey flights
Boston to Redding flights
Albany to Reno flights
Albany to Palm Springs flights
Boston to Medford flights
Albany to San Jose flights
Hyannis to Los Angeles flights
Albany to Long Beach flights
West Tisbury to San Francisco flights

Top 10 airlines flying from Boston to San Francisco Bay Area

Discover the top 10 airlines that operate flights from Boston to San Francisco Bay Area. 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 2,558,603 searches. Data last updated agosto 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$209FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$127Average$314FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$129Average$324FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$150Average$328FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$153Average$420FlexibilityNo cancel feeOn-time63%
Spirit AirlinesCheapest$166Average$252FlexibilityNo cancel feeOn-time65%
DeltaCheapest$178Average$373FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$195Average$471FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$227Average$399FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$228Average$399FlexibilityNo cancel feeOn-time75%

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.