$157+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — BOS
Jun 7 — Jun 141
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 September, booked 72 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday
Cheap flight deals from San Francisco to Boston
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Best
Last-minute
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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 May 8, 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 May 8, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 5/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:19 pm
SFO
- BOS
Nonstop5h 40m
JetBlue
Thu 7/98:55 pm
BOS
- SFO
Nonstop6h 36m
JetBlue
Deal found 5/4![JetBlue logo]()
$302
This CheapOair deal was found by Cheapflights users on 5/2. 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.
Tue 5/193:20 pm
SFO
- BOS
Nonstop5h 48m
Multiple Airlines
Wed 5/2712:01 pm
BOS
- SFO
1 stop10h 33m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$304
This Expedia deal was found by Cheapflights users on 5/3. 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.
Mon 8/1010:32 am
SFO
- BOS
1 stop16h 08m
Multiple Airlines
Sat 8/1512:04 pm
BOS
- SFO
1 stop10h 09m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$306
This Delta deal was found by Cheapflights users on 5/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:48 pm
SFO
- BOS
Nonstop5h 42m
Delta
Sat 9/57:00 am
BOS
- SFO
Nonstop6h 57m
Delta
Deal found 5/5![Delta logo]()
$307
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:20 am
SFO
- BOS
1 stop19h 24m
Multiple Airlines
Fri 5/297:13 am
BOS
- SFO
Nonstop6h 40m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$308
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:58 pm
SFO
- BOS
1 stop8h 22m
Multiple Airlines
Sat 5/3012:01 pm
BOS
- SFO
1 stop10h 33m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$309
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:30 am
SFO
- BOS
1 stop16h 14m
Multiple Airlines
Sat 6/612:01 pm
BOS
- SFO
1 stop10h 56m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:15 pm
SFO
- BOS
Nonstop5h 56m
United Airlines
Tue 6/96:10 pm
BOS
- SFO
Nonstop6h 37m
United Airlines
Deal found 5/7![United Airlines logo]()
$312
This United Airlines deal was found by Cheapflights users on 5/3. 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 8/128:58 pm
SFO
- BOS
Nonstop5h 52m
United Airlines
Wed 8/194:15 pm
BOS
- SFO
Nonstop6h 25m
United Airlines
Deal found 5/3![United Airlines logo]()
$313
This CheapOair deal was found by Cheapflights users on 5/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:44 pm
SFO
- BOS
Nonstop5h 42m
Multiple Airlines
Sun 8/236:00 am
BOS
- SFO
1 stop16h 25m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$314
This lol.travel deal was found by Cheapflights users on 5/4. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:44 pm
SFO
- BOS
Nonstop5h 44m
JetBlue
Wed 5/278:15 am
BOS
- SFO
Nonstop6h 43m
JetBlue
Deal found 5/4![JetBlue logo]()
$316
This JetBlue deal was found by Cheapflights users on 5/6. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:10 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Sat 6/69:15 pm
BOS
- SFO
Nonstop6h 42m
JetBlue
Deal found 5/6![JetBlue logo]()
$317
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 May 8, 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 May 8, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:41 pm
SFO
- BOS
1 stop9h 03m
Alaska Airlines
Wed 6/38:05 am
BOS
- SFO
1 stop11h 56m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 5/2. 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 7/146:56 pm
SFO
- BOS
1 stop8h 02m
United Airlines
Mon 7/208:20 pm
BOS
- SFO
Nonstop6h 37m
United Airlines
Deal found 5/2![United Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 5/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/310:50 pm
SFO
- BOS
1 stop8h 10m
Southwest
Wed 7/84:25 pm
BOS
- SFO
1 stop9h 05m
Southwest
Deal found 5/6![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 5/3. 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 7/79:20 am
SFO
- BOS
1 stop11h 31m
Delta
Wed 7/157:20 am
BOS
- SFO
Nonstop6h 31m
Delta
Deal found 5/3![Delta logo]()
$390
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Sun 6/711:05 pm
SFO
- BOS
Nonstop5h 56m
United Airlines
Fri 6/126:00 am
BOS
- SFO
1 stop8h 25m
United Airlines
Deal found 5/3![United Airlines logo]()
$342
This United Airlines deal was found by Cheapflights users on 5/2. 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 5/2311:05 pm
SFO
- BOS
Nonstop5h 56m
United Airlines
Thu 6/46:00 am
BOS
- SFO
Nonstop6h 27m
United Airlines
Deal found 5/2![United Airlines logo]()
$347
This Southwest deal was found by Cheapflights users on 5/2. 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 6/25:25 am
SFO
- BOS
1 stop10h 10m
Southwest
Tue 6/93:45 pm
BOS
- SFO
2 stops10h 30m
Southwest
Deal found 5/2![Southwest logo]()
$390
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/86:16 am
SFO
- BOS
1 stop20h 28m
Alaska Airlines
Thu 6/116:03 am
BOS
- SFO
1 stop9h 36m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$407
This Southwest deal was found by Cheapflights users on 5/4. 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.
Wed 6/36:20 am
SFO
- BOS
2 stops9h 15m
Southwest
Fri 7/31:10 pm
BOS
- SFO
2 stops11h 25m
Southwest
Deal found 5/4![Southwest logo]()
$397
This Alaska Airlines deal was found by Cheapflights users on 5/5. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:04 pm
SFO
- BOS
1 stop8h 16m
Alaska Airlines
Tue 7/144:33 pm
BOS
- SFO
1 stop9h 35m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$410
This Southwest deal was found by Cheapflights users on 5/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:45 am
SFO
- BOS
1 stop11h 20m
Southwest
Tue 7/143:45 pm
BOS
- SFO
2 stops10h 30m
Southwest
Deal found 5/5![Southwest logo]()
$414
This Southwest deal was found by Cheapflights users on 5/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/310:50 pm
SFO
- BOS
1 stop8h 10m
Southwest
Tue 7/73:45 pm
BOS
- SFO
2 stops10h 30m
Southwest
Deal found 5/6![Southwest logo]()
$417
Last-minute flights from San Francisco to BostonDiscover last-minute flight deals from San Francisco to Boston. Data last updated May 8, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Boston. Data last updated May 8, 2026 and is based on user searches.
This lol.travel deal was found by Cheapflights users on 5/4. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:44 pm
SFO
- BOS
Nonstop5h 44m
JetBlue
Wed 5/278:15 am
BOS
- SFO
Nonstop6h 43m
JetBlue
Deal found 5/4![JetBlue logo]()
$316
This CheapOair deal was found by Cheapflights users on 5/2. 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.
Tue 5/193:20 pm
SFO
- BOS
Nonstop5h 48m
Multiple Airlines
Wed 5/2712:01 pm
BOS
- SFO
1 stop10h 33m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$304
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:58 pm
SFO
- BOS
1 stop8h 22m
Multiple Airlines
Sat 5/3012:01 pm
BOS
- SFO
1 stop10h 33m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$309
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:20 am
SFO
- BOS
1 stop19h 24m
Multiple Airlines
Fri 5/297:13 am
BOS
- SFO
Nonstop6h 40m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$308
This JetBlue deal was found by Cheapflights users on 5/6. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/283:10 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Wed 6/39:15 pm
BOS
- SFO
Nonstop6h 42m
JetBlue
Deal found 5/6![JetBlue logo]()
$313
This Expedia deal was found by Cheapflights users on 5/5. 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.
Thu 5/286:16 am
SFO
- BOS
1 stop20h 28m
Multiple Airlines
Mon 6/112:01 pm
BOS
- SFO
1 stop10h 56m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$314
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:16 am
SFO
- BOS
1 stop20h 28m
Multiple Airlines
Wed 6/37:07 pm
BOS
- SFO
Nonstop6h 42m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$318
This CheapOair deal was found by Cheapflights users on 5/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:10 pm
SFO
- BOS
Nonstop5h 48m
Multiple Airlines
Mon 6/812:01 pm
BOS
- SFO
1 stop10h 56m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/14:15 pm
SFO
- BOS
Nonstop5h 56m
United Airlines
Tue 6/96:10 pm
BOS
- SFO
Nonstop6h 37m
United Airlines
Deal found 5/7![United Airlines logo]()
$312
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:06 pm
SFO
- BOS
1 stop8h 08m
United Airlines
Tue 6/97:28 am
BOS
- SFO
Nonstop6h 27m
United Airlines
Deal found 5/7![United Airlines logo]()
$307
This JetBlue deal was found by Cheapflights users on 5/6. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/23:10 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Sat 6/69:15 pm
BOS
- SFO
Nonstop6h 42m
JetBlue
Deal found 5/6![JetBlue logo]()
$317
This Expedia deal was found by Cheapflights users on 5/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:30 am
SFO
- BOS
1 stop16h 14m
Multiple Airlines
Sat 6/612:01 pm
BOS
- SFO
1 stop10h 56m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$311
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 May 8, 2026.
Search for one-way flight options from San Francisco to Boston. Find affordable one-way fares based on user searches. Data last updated May 8, 2026.
This Super.com deal was found by Cheapflights users on 5/2. 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.
Sun 7/1211:44 pm
SFO
- BOS
Nonstop5h 42m
JetBlue
Deal found 5/2![JetBlue logo]()
$157
This Southwest deal was found by Cheapflights users on 5/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/49:10 am
SFO
- BOS
1 stop10h 50m
Southwest
Deal found 5/6![Southwest logo]()
$159
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 5/236:01 am
SFO
- BOS
1 stop7h 58m
American Airlines
Deal found 5/2![American Airlines logo]()
$160
This United Airlines deal was found by Cheapflights users on 5/4. 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 6/212:25 pm
SFO
- BOS
Nonstop5h 56m
United Airlines
Deal found 5/4![United Airlines logo]()
$163
This Cheapflightsfares deal was found by Cheapflights users on 5/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:10 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Deal found 5/6![JetBlue logo]()
$164
This Super.com deal was found by Cheapflights users on 5/7. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/63:10 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Deal found 5/7![JetBlue logo]()
$167
This JetBlue deal was found by Cheapflights users on 5/7. 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.
Sat 5/233:10 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Deal found 5/7![JetBlue logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Tue 6/910:58 pm
SFO
- BOS
2 stops23h 29m
Frontier
Deal found 5/6![Frontier logo]()
$170
This Super.com deal was found by Cheapflights users on 5/3. 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.
Thu 5/281:08 pm
SFO
- BOS
Nonstop5h 48m
JetBlue
Deal found 5/3![JetBlue logo]()
$172
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:54 pm
SFO
- BOS
Nonstop5h 51m
Delta
Deal found 5/4![Delta logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 6/111:59 pm
SFO
- BOS
2 stops22h 25m
Frontier
Deal found 5/2![Frontier logo]()
$175
This United Airlines deal was found by Cheapflights users on 5/4. 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 6/302:27 pm
SFO
- BOS
1 stop7h 47m
United Airlines
Deal found 5/4![United Airlines logo]()
$176
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 May 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $302 (Cheapflightsfares) |
One-way from | $157 (Super.com) |
Popular in | April |
Cheapest in | January |
Average price | $427 |
Good round-trip deal | $413 or less |
Good one-way deal | $228 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 May 8, 2026.
Use the filters below to find and compare flights from San Francisco to Boston that are best for you.
Fly from
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Route
Depart
Return
Cheapest round-trip
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Tue 6/2
5:41 pm-5:44 am
1 stop9h 03m
Boston Logan Intl
Wed 6/3
8:05 am-5:01 pm
1 stop11h 56m
$314
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Tue 7/14
6:56 pm-5:58 am
1 stop8h 02m
Boston Logan Intl
Mon 7/20
8:20 pm-11:57 pm
Nonstop6h 37m
$317
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Fri 7/3
10:50 pm-10:00 am
1 stop8h 10m
Boston Logan Intl
Wed 7/8
4:25 pm-10:30 pm
1 stop9h 05m
$332
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Sun 6/7
11:05 pm-8:01 am
Nonstop5h 56m
Boston Logan Intl
Fri 6/12
6:00 am-11:25 am
1 stop8h 25m
$342
Quickest round-trip
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Sat 5/23
11:05 pm-8:01 am
Nonstop5h 56m
Boston Logan Intl
Thu 6/4
6:00 am-9:27 am
Nonstop6h 27m
$347
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Tue 7/7
9:20 am-11:51 pm
1 stop11h 31m
Boston Logan Intl
Wed 7/15
7:20 am-10:51 am
Nonstop6h 31m
$390
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Tue 6/2
5:25 am-6:35 pm
1 stop10h 10m
Boston Logan Intl
Tue 6/9
3:45 pm-11:15 pm
2 stops10h 30m
$390
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Wed 6/3
6:20 am-6:35 pm
2 stops9h 15m
Boston Logan Intl
Fri 7/3
1:10 pm-9:35 pm
2 stops11h 25m
$397
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Mon 6/8
6:16 am-5:44 am
1 stop20h 28m
Boston Logan Intl
Thu 6/11
6:03 am-12:39 pm
1 stop9h 36m
$407
San FranciscoBoston
SFO - BOS
SFOBOS
San Francisco
Wed 7/8
7:04 pm-6:20 am
1 stop8h 16m
Boston Logan Intl
Tue 7/14
4:33 pm-11:08 pm
1 stop9h 35m
$410
Showing 1-10 of 24 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 May.
| 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 Accuracy1 star | 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 90 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 $337). Flying from San Francisco to Boston in April is currently the most expensive (average of $470). 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 May 8, 2026.
It’s typically best to fly out from San Francisco to Boston in the afternoon. Doing so could potentially save you 14% 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 May 2, 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 17% of weekly flights between San Francisco and Boston have experienced delays in the past year, with the average delay time being 175 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, Alaska Airlines have had the lowest number of delays on this route, with just 13% 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 May 8, 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.
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Food
7.1
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
7.9
Crew
8.5
Food
7.1
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 locationsMedford
Cambridge
Concord
Hampton Beach
Watertown
Brockton
Seekonk
Cranston
Chelsea
Warwick
Peabody
Seabrook
York Beach
Londonderry
Swansea
Old Orchard Beach
Quincy
Waltham
Lowell
Braintree
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
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Alternative routes for San Francisco to Boston
See prices for flight routes from nearby airports that may be better suited for you.
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 May 8, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Francisco to Boston by cabin class
Find flights from San Francisco to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Francisco and Boston flights
Browse other San Francisco and Boston flight options. Last updated on May 8, 2026.
Other flights from San Francisco
Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on May 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 9 airlines flying from San Francisco to Boston
Discover the top 9 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 May 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$106 | Average$221 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$129 | Average$334 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$155 | Average$404 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$179 | Average$366 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$179 | Average$395 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$402 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$221 | Average$472 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$230 | Average$405 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$266 | Average$402 | FlexibilityNo cancel fee | On-time71% |