Cheap flights from Boston to San Francisco from £120
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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
11 Sep — 18 Sep1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to San Francisco are usually found in January or November, booked 86 days in advance, depart on a Thursday or Monday and return on a Monday
Cheap flight deals from Boston to San Francisco
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
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 12 August 2026.
Fri 23/1005:00 -
1 stop8h 15m
Wed 28/1017:50 -
2 stops11h 20m
Deal found 12/8£212
Tue 1/909:05 -
1 stop10h 50m
Wed 2/911:15 -
1 stop10h 10m
Deal found 12/8£214
Fri 23/1016:50 -
2 stops10h 50m
Thu 29/1020:00 -
2 stops9h 55m
Deal found 12/8£215
Wed 23/914:45 -
2 stops10h 25m
Tue 29/911:15 -
1 stop10h 15m
Deal found 11/8£228
Fri 11/1205:35 -
2 stops11h 50m
Tue 15/1221:25 -
1 stop7h 55m
Deal found 12/8£229
Wed 11/1117:55 -
1 stop9h 00m
Thu 19/1111:15 -
1 stop7h 25m
Deal found 12/8£231
Sat 12/912:10 -
2 stops11h 25m
Sat 19/906:25 -
1 stop15h 05m
Deal found 11/8£232
Mon 14/912:54 -
1 stop9h 54m
Mon 14/922:05 -
1 stop11h 02m
Deal found 10/8£233
Tue 29/921:30 -
Nonstop6h 26m
Sat 3/1014:00 -
Nonstop6h 19m
Deal found 11/8£235
Sat 12/910:10 -
Nonstop6h 32m
Sat 19/915:00 -
Nonstop5h 46m
Deal found 12/8£235
Thu 12/1108:15 -
1 stop11h 35m
Tue 5/107:00 -
2 stops11h 50m
Deal found 9/8£236
Mon 14/912:54 -
1 stop9h 54m
Tue 15/922:05 -
1 stop11h 04m
Deal found 10/8£238
Best flights from Boston to San Francisco
Discover carefully curated flight deals from Boston to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 August 2026.
Wed 2/914:45 -
2 stops10h 20m
Tue 22/907:40 -
2 stops13h 30m
Deal found 12/8£243
Sat 12/910:10 -
Nonstop6h 32m
Tue 15/907:10 -
Nonstop5h 47m
Deal found 10/8£250
Sat 10/1021:30 -
Nonstop6h 28m
Mon 12/1021:45 -
Nonstop5h 47m
Deal found 8/8£258
Fri 4/907:45 -
Nonstop6h 30m
Mon 7/923:18 -
Nonstop5h 56m
Deal found 7/8£266
Sat 12/910:10 -
Nonstop6h 32m
Wed 16/912:20 -
Nonstop5h 48m
Deal found 9/8£250
Sun 13/905:20 -
1 stop8h 15m
Tue 15/919:10 -
2 stops11h 45m
Deal found 10/8£265
Sun 13/906:50 -
Nonstop6h 23m
Sun 13/914:39 -
Nonstop6h 20m
Deal found 10/8£266
Wed 2/917:05 -
Nonstop6h 46m
Tue 22/915:00 -
Nonstop5h 46m
Deal found 12/8£250
Wed 2/915:20 -
2 stops11h 00m
Wed 9/907:40 -
2 stops10h 50m
Deal found 8/8£279
Thu 10/921:30 -
Nonstop6h 26m
Sun 13/923:10 -
1 stop11h 04m
Deal found 11/8£283
Sat 5/906:25 -
1 stop18h 50m
Tue 15/907:10 -
Nonstop5h 47m
Deal found 11/8£270
Direct flights from Boston to San Francisco
Explore direct flight options from Boston to San Francisco based on user searches, and compare prices and availability for your desired travel dates. Data last updated 12 August 2026.
Tue 29/910:10 -
Nonstop6h 32m
Sat 10/1015:00 -
Nonstop5h 39m
Deal found 12/8£235
Sat 12/913:00 -
Nonstop6h 23m
Sat 19/914:00 -
Nonstop6h 19m
Deal found 12/8£235
Wed 23/907:35 -
Nonstop6h 29m
Wed 7/1015:00 -
Nonstop5h 39m
Deal found 11/8£250
Tue 15/907:35 -
Nonstop6h 29m
Sat 19/915:00 -
Nonstop5h 46m
Deal found 12/8£255
Wed 2/917:05 -
Nonstop6h 46m
Tue 22/915:00 -
Nonstop5h 46m
Deal found 10/8£257
Wed 30/907:35 -
Nonstop6h 29m
Sun 4/1015:00 -
Nonstop5h 46m
Deal found 11/8£258
Sun 4/1006:00 -
Nonstop6h 30m
Wed 7/1012:10 -
Nonstop5h 47m
Deal found 12/8£259
Sat 5/916:15 -
Nonstop6h 34m
Sun 13/914:39 -
Nonstop6h 20m
Deal found 11/8£264
Wed 2/918:13 -
Nonstop6h 31m
Fri 4/907:00 -
Nonstop5h 55m
Deal found 11/8£265
Fri 4/906:30 -
Nonstop6h 30m
Sun 6/915:40 -
Nonstop6h 17m
Deal found 11/8£266
Thu 27/814:00 -
Nonstop6h 23m
Wed 2/908:12 -
Nonstop5h 55m
Deal found 12/8£272
Last-minute flights from Boston to San Francisco
Discover last-minute flight deals from Boston to San Francisco. Data last updated 12 August 2026 and is based on user searches.
Tue 1/909:05 -
1 stop10h 50m
Wed 2/911:15 -
1 stop10h 10m
Deal found 12/8£214
Wed 2/915:20 -
2 stops11h 00m
Wed 9/919:10 -
2 stops10h 50m
Deal found 9/8£239
Wed 9/915:20 -
2 stops11h 00m
Thu 17/910:50 -
1 stop10h 40m
Deal found 11/8£236
Thu 10/911:15 -
1 stop10h 15m
Thu 17/910:50 -
1 stop10h 40m
Deal found 10/8£242
Fri 11/908:40 -
1 stop11h 55m
Tue 15/919:10 -
2 stops11h 45m
Deal found 12/8£212
Sat 12/912:10 -
2 stops11h 25m
Sat 19/906:25 -
1 stop15h 05m
Deal found 11/8£232
Sat 12/910:10 -
Nonstop6h 32m
Sat 19/915:00 -
Nonstop5h 46m
Deal found 12/8£235
Mon 14/912:54 -
1 stop9h 54m
Mon 14/922:05 -
1 stop11h 02m
Deal found 10/8£233
Mon 14/912:54 -
1 stop9h 54m
Tue 15/922:05 -
1 stop11h 04m
Deal found 10/8£238
Wed 23/914:45 -
2 stops10h 25m
Tue 29/911:15 -
1 stop10h 15m
Deal found 11/8£228
Tue 29/907:35 -
Nonstop6h 29m
Tue 13/1015:00 -
Nonstop5h 39m
Deal found 12/8£235
Wed 30/905:25 -
2 stops10h 30m
Mon 5/1019:25 -
2 stops10h 25m
Deal found 11/8£240
One-way flights from Boston to San Francisco
Search for one-way flight options from Boston to San Francisco. Find affordable one-way fares based on user searches. Data last updated 12 August 2026.
Fri 13/1105:35 -
2 stops11h 50m
Deal found 11/8£120
Sat 12/917:00 -
Nonstop6h 31m
Deal found 11/8£125
Thu 3/908:00 -
1 stop9h 45m
Deal found 9/8£126
Tue 1/914:45 -
2 stops11h 35m
Deal found 12/8£127
Sun 6/909:36 -
2 stops14h 10m
Deal found 8/8£128
Wed 19/807:10 -
1 stop9h 40m
Deal found 12/8£129
Mon 28/919:59 -
1 stop16h 38m
Deal found 10/8£130
Fri 18/906:50 -
Nonstop6h 23m
Deal found 12/8£132
Sat 5/917:05 -
Nonstop6h 46m
Deal found 8/8£133
Sun 6/907:35 -
Nonstop6h 34m
Deal found 12/8£133
Wed 16/905:25 -
2 stops10h 45m
Deal found 11/8£136
Find 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 12 August 2026.
Customise 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 858,174 searches. Data last updated 12 August 2026.
Use the filters below to find and compare flights from Boston to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Wed 2/9
14:45-22:05
2 stops10h 20m
San Francisco
Tue 22/9
07:40-00:10
2 stops13h 30m
£243
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sat 12/9
10:10-13:42
Nonstop6h 32m
San Francisco
Tue 15/9
07:10-15:57
Nonstop5h 47m
£250
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sat 12/9
10:10-13:42
Nonstop6h 32m
San Francisco
Wed 16/9
12:20-21:08
Nonstop5h 48m
£250
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Wed 2/9
17:05-20:51
Nonstop6h 46m
San Francisco
Tue 22/9
15:00-23:46
Nonstop5h 46m
£250
Fastest return journey
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sat 10/10
21:30-00:58
Nonstop6h 28m
San Francisco
Mon 12/10
21:45-06:32
Nonstop5h 47m
£258
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sun 13/9
05:20-10:35
1 stop8h 15m
San Francisco
Tue 15/9
19:10-09:55
2 stops11h 45m
£265
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Fri 4/9
07:45-11:15
Nonstop6h 30m
San Francisco
Mon 7/9
23:18-08:14
Nonstop5h 56m
£266
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sun 13/9
06:50-10:13
Nonstop6h 23m
San Francisco
Sun 13/9
14:39-23:59
Nonstop6h 20m
£266
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sat 5/9
06:25-22:15
1 stop18h 50m
San Francisco
Tue 15/9
07:10-15:57
Nonstop5h 47m
£270
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Wed 2/9
15:20-23:20
2 stops11h 00m
San Francisco
Wed 9/9
07:40-21:30
2 stops10h 50m
£279
Flights are sorted by cheapest return flights first.
Deals found on 11/8
Showing 1-10 of 22 resultsSorted by cheapest first
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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.
BOS-SFO
Estimated return 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
Prices
Airlines
Delays
How far ahead should I book a flight from Boston to San Francisco?
Booking 85 days in advance of your planned departure date is, on average, the best time to get cheap flights from Boston to San Francisco. 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 Boston to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Boston to San Francisco (average of £251). Flying from Boston to San Francisco in June is currently the most expensive (average of £341). 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 12 August 2026.
A simple way to save on the total cost of your ticket is to fly from Boston to San Francisco in the evening. If you’re flexible enough to do this you can expect to save up to 52% on your trip compared to booking a flight at midday.
How much does it cost for a return flight from Boston to San Francisco?
Airfare is below average for this route at the moment.
Boston to San Francisco flights typically cost between £255 and £407 in October.The cheapest return price found within the last 5 days was £212 on Southwest (23 Oct–28 Oct).
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 12 August 2026.
The most flights from BOS to SFO are scheduled on a Tuesday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).
How often are flights from Boston to San Francisco delayed?
About 20% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 171 minutes.
What is the most punctual flight time for Boston to San Francisco flights?
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Boston to San Francisco flights?
Over the past year, United Airlines have had the lowest number of delays on this route, with just 18% of flights being delayed.
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 12 August 2026.
Get a feel of what it's like to fly with Delta and JetBlue from Boston to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
I like Delta overall but the delays lately without justification are not leaving a good impression. Both flights were delayed for over 2 hours
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?
You will need to book a flight from Boston Logan Intl to San Francisco if you want to fly from Boston to San Francisco. At least 2 different airlines have flights from Logan Intl (BOS) to San Francisco (SFO) on a regular basis. There are 31 flights to San Francisco from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SFO to be around 6h 32m.
How popular is this Boston to San Francisco flight route?
Within the past month, 3 users have taken a look at flights from Boston Logan Intl to San Francisco.
How long is the flight from Boston to San Francisco?
Departing from Boston to San Francisco will take you 6h 28m. Boston and San Francisco are separated by a distance of 2696 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Boston to San Francisco round-trip?
Flying on JetBlue is currently your cheapest option to San Francisco, with prices starting at £179. Another option worth looking into is Delta, starting at £416 return. You may be able to fly from Boston to San Francisco for 40% less than the average price by searching for these airlines.
What are the most reliable airlines from Boston to San Francisco?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Francisco on time: Air China (86%), LATAM Airlines (85%), ANA (82%).
What are the cheapest flights from Boston to San Francisco?
On average you can expect to pay £354 for a flight from Boston to San Francisco. The cheapest flight overall is £158 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £260.
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 £251). Flying from Boston to San Francisco in June is currently the most expensive (average of £341). 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.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 12 August 2026.
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 858,174 searches. Data last updated 12 August 2026.
Find the best flight deals on Cheapflights, where travellers 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?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to San Francisco. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
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?
Yes! Cheapflights helps users easily find flights from Boston to San Francisco with no change fees.
Can Cheapflights notify me if prices for flights from Boston to San Francisco become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to San Francisco from Boston today and book when prices fit your budget.
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