$154+ Cheap flights from San Francisco to Boston (SFO - BOS)
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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
Sep 8 — Sep 151
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco to Boston 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.Cheapflights Tip: The best prices from San Francisco to Boston Logan Intl are usually found in January or February, booked 89 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
Cheap flight deals from San Francisco to Boston
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Francisco to BostonExplore 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 August 9, 2026.
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 August 9, 2026.
This Expedia deal was found by Cheapflights users on 8/5. 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.
Wed 8/2610:35 pm -
1 stop10h 12m
Sat 8/298:00 am -
1 stop9h 45m
Deal found 8/5![Multiple Airlines logo]()
$288
This Expedia deal was found by Cheapflights users on 8/5. 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.
Tue 9/1510:05 pm -
1 stop11h 04m
Fri 9/188:00 am -
1 stop9h 45m
Deal found 8/5![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:35 pm -
2 stops15h 12m
Wed 9/212:45 pm -
1 stop9h 18m
Deal found 8/6![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:35 pm -
2 stops15h 12m
Mon 8/3112:45 pm -
1 stop9h 18m
Deal found 8/7![Frontier logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:16 pm -
1 stop9h 31m
Sat 9/1212:54 pm -
1 stop9h 54m
Deal found 8/7![Multiple Airlines logo]()
$292
This Super.com deal was found by Cheapflights users on 8/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:35 pm -
1 stop10h 12m
Sat 9/1212:54 pm -
1 stop9h 54m
Deal found 8/4![Frontier logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:38 pm -
2 stops17h 09m
Mon 8/2412:45 pm -
1 stop9h 18m
Deal found 8/9![Frontier logo]()
$294
This Frontier deal was found by Cheapflights users on 8/5. 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.
Thu 8/2710:35 pm -
1 stop10h 12m
Mon 8/3112:45 pm -
1 stop9h 18m
Deal found 8/5![Frontier logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:35 pm -
1 stop10h 12m
Wed 9/912:54 pm -
2 stops22h 20m
Deal found 8/8![Frontier logo]()
$296
This American Airlines deal was found by Cheapflights users on 8/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:45 am -
1 stop8h 59m
Mon 8/317:33 am -
1 stop8h 45m
Deal found 8/5![American Airlines logo]()
$297
This deal was found by Cheapflights users on 8/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am -
1 stop7h 54m
Thu 9/173:53 pm -
1 stop10h 35m
Deal found 8/4![American Airlines logo]()
$299
Best flights from San Francisco to BostonDiscover carefully curated flight deals from San Francisco to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
Discover carefully curated flight deals from San Francisco to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 9, 2026.
This Delta deal was found by Cheapflights users on 8/6. 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.
Tue 9/2212:20 pm -
Nonstop5h 48m
Sat 9/2610:10 am -
Nonstop6h 32m
Deal found 8/6![Delta logo]()
$307
This United Airlines deal was found by Cheapflights users on 8/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2210:58 pm -
Nonstop5h 56m
Sat 9/267:45 am -
Nonstop6h 30m
Deal found 8/4![United Airlines logo]()
$337
This JetBlue deal was found by Cheapflights users on 8/8. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:00 pm -
Nonstop6h 19m
Tue 9/156:09 pm -
Nonstop6h 31m
Deal found 8/8![JetBlue logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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.
Tue 9/2910:36 am -
1 stop10h 18m
Fri 10/167:03 am -
1 stop12h 05m
Deal found 8/7![Alaska Airlines logo]()
$373
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:40 pm -
2 stops10h 00m
Tue 9/229:05 am -
1 stop10h 50m
Deal found 8/4![Southwest logo]()
$387
This United Airlines deal was found by Cheapflights users on 8/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/1112:45 pm -
Nonstop5h 57m
Tue 1/127:30 am -
Nonstop6h 45m
Deal found 8/8![United Airlines logo]()
$359
This JetBlue deal was found by Cheapflights users on 8/7. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:10 pm -
1 stop11h 04m
Sat 10/176:55 am -
Nonstop6h 35m
Deal found 8/7![JetBlue logo]()
$372
This Southwest deal was found by Cheapflights users on 8/8. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:50 pm -
2 stops11h 00m
Mon 10/261:05 pm -
2 stops12h 00m
Deal found 8/8![Southwest logo]()
$392
This JetBlue deal was found by Cheapflights users on 8/5. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:25 am -
Nonstop5h 55m
Mon 10/52:45 pm -
1 stop11h 34m
Deal found 8/5![JetBlue logo]()
$383
This Alaska Airlines deal was found by Cheapflights users on 8/7. 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.
Thu 10/227:27 am -
2 stops13h 32m
Mon 10/267:51 am -
1 stop10h 00m
Deal found 8/7![Alaska Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 8/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/292:07 pm -
Nonstop5h 52m
Sun 9/69:20 am -
Nonstop6h 23m
Deal found 8/6![United Airlines logo]()
$423
This JetBlue deal was found by Cheapflights users on 8/8. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:59 am -
1 stop10h 33m
Tue 9/19:50 am -
Nonstop6h 33m
Deal found 8/8![JetBlue logo]()
$440
Last-minute flights from San Francisco to BostonDiscover last-minute flight deals from San Francisco to Boston. Data last updated August 9, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Boston. Data last updated August 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:38 pm -
2 stops17h 09m
Mon 8/2412:45 pm -
1 stop9h 18m
Deal found 8/9![Frontier logo]()
$294
This American Airlines deal was found by Cheapflights users on 8/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:45 am -
1 stop8h 59m
Sun 8/235:32 am -
1 stop9h 42m
Deal found 8/5![American Airlines logo]()
$297
This Super.com deal was found by Cheapflights users on 8/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:35 pm -
1 stop10h 12m
Sat 9/1212:54 pm -
1 stop9h 54m
Deal found 8/4![Frontier logo]()
$293
This CheapOair deal was found by Cheapflights users on 8/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:18 pm -
Nonstop5h 41m
Tue 9/112:45 pm -
1 stop9h 18m
Deal found 8/7![Multiple Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:35 pm -
2 stops15h 12m
Wed 9/212:45 pm -
1 stop9h 18m
Deal found 8/6![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:35 pm -
2 stops15h 12m
Tue 9/112:45 pm -
1 stop9h 18m
Deal found 8/7![Frontier logo]()
$291
This Expedia deal was found by Cheapflights users on 8/4. 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.
Wed 8/2610:35 pm -
1 stop10h 12m
Sat 8/298:55 pm -
Nonstop6h 35m
Deal found 8/4![Multiple Airlines logo]()
$298
This Frontier deal was found by Cheapflights users on 8/5. 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.
Thu 8/2710:35 pm -
1 stop10h 12m
Mon 8/3112:45 pm -
1 stop9h 18m
Deal found 8/5![Frontier logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:35 pm -
1 stop10h 12m
Wed 9/912:54 pm -
2 stops22h 20m
Deal found 8/8![Frontier logo]()
$296
This deal was found by Cheapflights users on 8/4. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am -
1 stop7h 54m
Thu 9/173:53 pm -
1 stop10h 35m
Deal found 8/4![American Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:16 pm -
1 stop9h 31m
Sat 9/1212:54 pm -
1 stop9h 54m
Deal found 8/7![Multiple Airlines logo]()
$292
This Expedia deal was found by Cheapflights users on 8/5. 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.
Tue 9/1510:05 pm -
1 stop11h 04m
Fri 9/188:00 am -
1 stop9h 45m
Deal found 8/5![Multiple Airlines logo]()
$289
One-way flights from San Francisco to BostonSearch for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
Search for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated August 9, 2026.
This United Airlines deal was found by Cheapflights users on 8/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/911:18 pm -
Nonstop5h 56m
Deal found 8/5![United Airlines logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:24 pm -
2 stops34h 35m
Deal found 8/8![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/179:33 am -
2 stops43h 47m
Deal found 8/8![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:20 am -
2 stops21h 27m
Deal found 8/6![Frontier logo]()
$157
This Jetabroad deal was found by Cheapflights users on 8/5. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:25 pm -
1 stop8h 23m
Deal found 8/5![JetBlue logo]()
$158
This Alaska Airlines deal was found by Cheapflights users on 8/9. 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.
Sat 10/104:43 pm -
1 stop9h 38m
Deal found 8/9![Alaska Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/112:28 pm -
2 stops18h 31m
Deal found 8/7![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:23 pm -
2 stops57h 46m
Deal found 8/5![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 8/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:05 pm -
2 stops32h 24m
Deal found 8/4![Multiple Airlines logo]()
$163
This American Airlines deal was found by Cheapflights users on 8/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/112:30 pm -
1 stop9h 00m
Deal found 8/7![American Airlines logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:30 pm -
2 stops37h 17m
Deal found 8/7![Frontier logo]()
$166
Find 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 August 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $288 (Expedia) |
One-way from | $154 (United Airlines) |
Popular in | June |
Cheapest in | January |
Average price | $417 |
Good round-trip deal | $360 or less |
Good one-way deal | $199 or less |
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 2,558,603 searches. Data last updated August 9, 2026.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Tue 9/22
12:20 pm-9:08 pm
Nonstop5h 48m
Boston Logan Intl
Sat 9/26
10:10 am-1:42 pm
Nonstop6h 32m
$307
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Tue 9/22
10:58 pm-7:54 am
Nonstop5h 56m
Boston Logan Intl
Sat 9/26
7:45 am-11:15 am
Nonstop6h 30m
$337
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Sat 9/12
2:00 pm-11:19 pm
Nonstop6h 19m
Boston Logan Intl
Tue 9/15
6:09 pm-9:40 pm
Nonstop6h 31m
$337
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Mon 1/11
12:45 pm-9:42 pm
Nonstop5h 57m
Boston Logan Intl
Tue 1/12
7:30 am-11:15 am
Nonstop6h 45m
$359
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Mon 9/28
11:10 pm-1:14 pm
1 stop11h 04m
Boston Logan Intl
Sat 10/17
6:55 am-10:30 am
Nonstop6h 35m
$372
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Tue 9/29
10:36 am-11:54 pm
1 stop10h 18m
Boston Logan Intl
Fri 10/16
7:03 am-4:08 pm
1 stop12h 05m
$373
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Fri 10/2
11:25 am-8:20 pm
Nonstop5h 55m
Boston Logan Intl
Mon 10/5
2:45 pm-11:19 pm
1 stop11h 34m
$383
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Mon 9/14
11:40 pm-12:40 pm
2 stops10h 00m
Boston Logan Intl
Tue 9/22
9:05 am-4:55 pm
1 stop10h 50m
$387
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Tue 10/20
6:50 pm-8:50 am
2 stops11h 00m
Boston Logan Intl
Mon 10/26
1:05 pm-10:05 pm
2 stops12h 00m
$392
San FranciscoBoston
SFO San Francisco - BOS Boston Logan Intl
SFOBOS
San Francisco
Thu 10/22
7:27 am-11:59 pm
2 stops13h 32m
Boston Logan Intl
Mon 10/26
7:51 am-2:51 pm
1 stop10h 00m
$423
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from San Francisco to Boston
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Francisco to Boston in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Francisco-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Francisco-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
SFO-BOS
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
Prices
Airlines
Delays
How far ahead should I book a flight from San Francisco to Boston?
The best time to book flights from San Francisco to Boston is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from San Francisco to Boston?
Currently, January is the cheapest month in which you can book a flight from San Francisco to Boston (average of $334). Flying from San Francisco to Boston in June is currently the most expensive (average of $502). 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 August 9, 2026.
It’s typically best to fly out from San Francisco to Boston in the afternoon. Doing so could potentially save you 18% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from San Francisco to Boston?
Use this chart to determine the cheapest time to fly round-trip from San Francisco to Boston. Price data was last updated on August 1, 2026.
Travelers seeking maximum savings on their San Francisco to Boston flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from San Francisco to Boston delayed?
About 18% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 178 minutes.
What is the most punctual flight time for San Francisco to Boston flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon 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 San Francisco to Boston flights?
Over the last year, Delta have had the lowest number of delays on this route, with just 17% of flights being delayed.
The best insider tips for San Francisco to Boston flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your San Francisco to Boston trip
Our travel experts
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 August 9, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited Airlines from San Francisco to Boston. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Comfort
7.8
Food
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Comfort
7.8
Food
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Comfort
7.8
Food
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Comfort
7.8
Food
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Comfort
7.8
Food
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Comfort
7.8
Food
7.0
Boarding
8.1
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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.
Traveling to a place near Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Randolph
Cambridge
Concord
Brockton
Seekonk
Cranston
Dedham
Warwick
Peabody
Hampton Beach
Auburn
York Beach
Chelsea
Londonderry
Swansea
Fitchburg
North Falmouth
Braintree
Revere
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Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 9, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
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San Francisco and Boston flights
Browse other San Francisco and Boston flight options. Last updated on August 9, 2026.
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Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on August 9, 2026.
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Top 8 airlines flying from San Francisco to Boston
Discover the top 8 airlines that operate flights from San Francisco to Boston. 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 August 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$106 | Average$235 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$118 | Average$296 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$167 | Average$423 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$192 | Average$377 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$202 | Average$421 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$235 | Average$487 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$256 | Average$393 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$267 | Average$421 | FlexibilityNo cancel fee | On-time63% |