Cheap flights from Boston to San Francisco from £131
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SFO
24 Oct — 31 Oct1
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 28 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 24 September 2026.
Fri 4/1219:40 -
Nonstop6h 46m
Tue 8/1210:51 -
1 stop9h 57m
Deal found 19/9£251
Wed 11/1116:09 -
1 stop10h 45m
Wed 18/1108:05 -
1 stop8h 28m
Deal found 23/9£254
Thu 3/1207:25 -
1 stop9h 19m
Sun 6/1223:32 -
1 stop8h 14m
Deal found 21/9£254
Thu 10/1207:25 -
1 stop9h 19m
Mon 14/1223:35 -
Nonstop5h 34m
Deal found 19/9£255
Sat 7/1116:09 -
1 stop10h 45m
Sat 14/1120:55 -
1 stop7h 55m
Deal found 22/9£256
Sat 24/1007:03 -
1 stop10h 20m
Sat 24/1016:43 -
1 stop9h 38m
Deal found 20/9£257
Wed 18/1116:33 -
1 stop19h 27m
Tue 1/1207:00 -
1 stop13h 59m
Deal found 23/9£258
Wed 2/1206:00 -
Nonstop6h 41m
Mon 7/1222:00 -
1 stop9h 46m
Deal found 23/9£258
Tue 27/1016:10 -
1 stop10h 48m
Sat 31/1022:20 -
1 stop10h 21m
Deal found 19/9£259
Thu 12/1116:09 -
1 stop10h 45m
Tue 17/1106:00 -
1 stop10h 41m
Deal found 19/9£260
Wed 2/1219:40 -
Nonstop6h 46m
Sat 12/1206:00 -
1 stop8h 03m
Deal found 21/9£261
Tue 3/1107:13 -
1 stop9h 57m
Wed 11/1112:13 -
1 stop8h 45m
Deal found 23/9£261
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 24 September 2026.
Fri 23/1016:30 -
Nonstop6h 35m
Sun 25/1022:10 -
Nonstop5h 34m
Deal found 21/9£291
Fri 9/1006:00 -
Nonstop6h 30m
Sat 24/1013:50 -
1 stop8h 04m
Deal found 19/9£328
Sat 7/1111:35 -
2 stops13h 00m
Mon 9/1118:00 -
2 stops11h 20m
Deal found 22/9£329
Fri 20/1106:00 -
1 stop9h 53m
Fri 27/1106:00 -
1 stop14h 59m
Deal found 18/9£349
Thu 19/1109:45 -
1 stop10h 55m
Thu 26/1106:00 -
Nonstop5h 31m
Deal found 21/9£318
Fri 20/1105:00 -
1 stop8h 30m
Thu 26/1106:35 -
1 stop7h 25m
Deal found 22/9£331
Fri 20/1108:15 -
1 stop9h 55m
Fri 27/1105:05 -
2 stops10h 45m
Deal found 22/9£342
Tue 22/1216:50 -
1 stop9h 12m
Sun 17/123:20 -
Nonstop5h 40m
Deal found 19/9£377
Wed 7/1006:45 -
2 stops11h 25m
Mon 12/1021:35 -
1 stop8h 15m
Deal found 22/9£408
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 24 September 2026.
Fri 4/1209:45 -
Nonstop6h 53m
Mon 7/1223:20 -
Nonstop5h 37m
Deal found 21/9£269
Wed 18/1119:45 -
Nonstop6h 46m
Tue 1/1221:57 -
Nonstop5h 37m
Deal found 23/9£273
Sat 17/1010:05 -
Nonstop6h 38m
Sat 24/1007:00 -
Nonstop5h 45m
Deal found 23/9£276
Wed 28/1006:00 -
Nonstop6h 40m
Sun 1/1112:14 -
Nonstop5h 46m
Deal found 20/9£283
Tue 27/1008:05 -
Nonstop6h 49m
Sun 1/1114:42 -
Nonstop5h 39m
Deal found 23/9£284
Thu 22/1016:30 -
Nonstop6h 35m
Tue 27/1007:30 -
Nonstop5h 35m
Deal found 23/9£285
Thu 29/1010:05 -
Nonstop6h 38m
Sun 1/1107:00 -
Nonstop5h 45m
Deal found 20/9£291
Thu 15/1006:00 -
Nonstop6h 30m
Sun 18/1023:20 -
Nonstop5h 56m
Deal found 23/9£291
Thu 22/1020:51 -
Nonstop6h 33m
Thu 29/1015:00 -
Nonstop5h 39m
Deal found 23/9£292
Sun 22/1110:05 -
Nonstop6h 46m
Tue 1/1221:57 -
Nonstop5h 37m
Deal found 23/9£296
Sat 3/1017:15 -
Nonstop6h 30m
Sun 11/1007:00 -
Nonstop5h 45m
Deal found 20/9£299
Last-minute flights from Boston to San Francisco
Discover last-minute flight deals from Boston to San Francisco. Data last updated 24 September 2026 and is based on user searches.
Mon 28/919:44 -
1 stop16h 36m
Wed 28/1007:55 -
1 stop18h 45m
Deal found 21/9£329
Wed 30/912:54 -
1 stop10h 14m
Tue 6/1019:11 -
1 stop9h 15m
Deal found 20/9£325
Sat 3/1007:51 -
1 stop11h 25m
Sat 10/1016:43 -
1 stop9h 38m
Deal found 19/9£288
Sat 3/1007:51 -
1 stop11h 25m
Sun 11/1008:20 -
1 stop29h 47m
Deal found 19/9£290
Sat 3/1017:15 -
Nonstop6h 30m
Sat 10/1012:40 -
Nonstop5h 40m
Deal found 19/9£291
Sat 3/1021:30 -
Nonstop6h 26m
Tue 6/1006:00 -
1 stop8h 24m
Deal found 19/9£296
Sat 3/1017:15 -
Nonstop6h 30m
Sun 11/1007:00 -
Nonstop5h 45m
Deal found 20/9£299
Sat 3/1009:20 -
Nonstop6h 23m
Sun 4/1014:05 -
Nonstop5h 52m
Deal found 19/9£314
Sat 3/1013:25 -
2 stops10h 45m
Tue 6/1021:35 -
1 stop9h 20m
Deal found 19/9£333
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 24 September 2026.
Wed 4/1107:13 -
1 stop9h 57m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 22/9£131
Thu 3/1207:25 -
1 stop9h 19m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 23/9£135
Tue 27/1016:10 -
1 stop10h 48m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 19/9£136
Mon 16/1118:09 -
1 stop8h 50m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 20/9£137
Sat 17/1010:05 -
Nonstop6h 38m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 23/9£139
Wed 16/1207:10 -
1 stop8h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 20/9£142
Thu 22/1007:51 -
1 stop10h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 21/9£143
Fri 4/1209:10 -
2 stops12h 10m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 23/9£146
Fri 23/1018:14 -
1 stop28h 17m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 21/9£148
Sat 31/1005:30 -
2 stops12h 05m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 21/9£150
Tue 6/1007:45 -
Nonstop6h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 22/9£154
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 24 September 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 7,457,451 searches. Data last updated 24 September 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
Sat 31/10
17:05-20:55
Nonstop6h 50m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£139
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Fri 13/11
18:09-23:59
1 stop8h 50m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£139
Fastest return journey
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Tue 20/10
21:35-01:05
Nonstop6h 30m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£139
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Mon 26/10
20:40-00:25
Nonstop6h 45m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£146
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Sat 31/10
05:30-14:35
2 stops12h 05m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£150
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Tue 20/10
06:45-15:10
2 stops11h 25m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£150
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Fri 20/11
08:15-15:10
1 stop9h 55m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£169
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Wed 14/10
17:45-21:23
Nonstop6h 38m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£187
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Mon 21/12
20:46-00:41
Nonstop6h 55m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£187
BostonSan Francisco
BOS Boston Logan Intl - SFO San Francisco
BOSSFO
Boston Logan Intl
Mon 21/12
06:00-09:54
Nonstop6h 54m
San Francisco
Wed 31/12
00:00-03:00
Nonstop0h 00m
£191
Flights are sorted by cheapest return flights first.
Deals found on 21/9
Showing 1-10 of 20 resultsSorted by cheapest first
1
2
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 27 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 £256). Flying from Boston to San Francisco in June is currently the most expensive (average of £351). 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 24 September 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 £264 and £405 in December.The cheapest return price found within the last 5 days was £251 on JetBlue (4 Dec–8 Dec).
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 24 September 2026.
The most flights from BOS to SFO are scheduled on a Tuesday (37 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 on average).
How often are flights from Boston to San Francisco delayed?
About 22% of weekly flights between Boston and San Francisco have experienced delays in the past year, with the average delay time being 172 minutes.
What is the most punctual flight time for Boston to San Francisco flights?
Historically, flights departing at night 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?
Saturday 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 20% 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 24 September 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 26 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 26m.
How popular is this Boston to San Francisco flight route?
Within the past month, 2 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 30m. 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 £182. Another option worth looking into is Delta, starting at £391 return. You may be able to fly from Boston to San Francisco for 42% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Boston to San Francisco one-way?
The cheapet airlines for a one-way flight from Boston to San Francisco are JetBlue (£77), Delta (£127), and United Airlines (£172).
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 (87%), KLM (86%), ANA (84%).
What are the cheapest flights from Boston to San Francisco?
On average you can expect to pay £235 for a flight from Boston to San Francisco. The cheapest flight overall is £141 while the most popular route, (Boston Logan Intl - San Francisco) is currently priced at £282.
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 £256). Flying from Boston to San Francisco in June is currently the most expensive (average of £351). 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.
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on 24 September 2026.
Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 24 September 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 7,457,451 searches. Data last updated 24 September 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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