Our cheapest offers for flights from San Francisco to Boston

Here you can compare cheap flights from San Francisco (SFO) to Boston (BOS) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Boston. Prices and availability may change at any time.

	Outbound	Return	Airlines	Baggage	Price
Best option San Francisco Boston	Outbound 09/19/25 direct AS0425 05h 52min	Return 09/29/25 direct AS0356 06h 29min	Alaska Airlines	?	$244
San Francisco Boston Pay attention to transfer at connecting flight	Outbound 09/19/25 3 Stopovers (MSP, DTW, FLL) SY0396, NK2383, NK3721, NK0616 27h 21min	Return 09/29/25 2 Stopovers (DTW, MSP) NK2328, NK2388, SY0393 25h 07min	Sun Country Airlines, Spirit Airlines		$367
San Francisco Boston	Outbound 09/19/25 direct AS0425 05h 52min	Return 09/29/25 direct AS0356 06h 29min	Alaska Airlines	?	$255
San Francisco Boston	Outbound 09/19/25 direct AS0425 05h 52min	Return 09/29/25 direct AS0356 06h 29min	Alaska Airlines	?	$258
San Francisco Boston	Outbound 09/19/25 direct AS0425 05h 52min	Return 09/29/25 direct AS0356 06h 29min	Alaska Airlines		$271
San Francisco Boston	Outbound 07/25/25 direct AS0307 05h 42min	Return 08/17/25 1 Stopover (JFK) B61417, B60515 11h 14min	Alaska Airlines	?	$281
San Francisco Boston	Outbound 07/25/25 1 Stopover (JFK) B61716, B61018 08h 50min	Return 08/17/25 1 Stopover (JFK) B61417, B60515 11h 14min	JetBlue Airways	?	$287
San Francisco Boston	Outbound 07/25/25 direct AS0307 05h 42min	Return 08/17/25 1 Stopover (SAN) AS0389, AS3343 09h 05min	Alaska Airlines		$293
San Francisco Boston	Outbound 07/25/25 direct AS0307 05h 42min	Return 08/17/25 1 Stopover (SAN) AS0389, AS3343 09h 05min	Alaska Airlines	?	$294
San Francisco Boston	Outbound 09/19/25 direct B60734 05h 43min	Return 09/29/25 direct B60733 06h 44min	JetBlue Airways	?	$301

Tips and tricks to help you find cheap flights from San Francisco to Boston

Important flight information

Flight information: San Francisco - Boston

Flight duration	min. 05:26 / max. 05:48
Return flight duration	min. 06:48/ max. 10:14
Distance	4346 km
Flights per week	100
Departure airport	Airport San Francisco International Airport, CA (SFO)
Arrival airport	Airport Boston Logan International Airport, MA (BOS)
Destination country	Flights to United States

Alternative routes to United States

Flight San Francisco - Houston - George Bush from $568

Alternative flights to Boston

Flight destinations with a similar price

Flight Boston - Istanbul from $581
Flight Boston - Vienna from $495
Flight Boston - London Heathrow from $445
Flight Boston - London from $445
Flight Boston - Aruba from $388
Flight Boston - Sydney from $740
Flight Boston - Bermuda from $287
Flight Boston - Vancouver from $190
Flight Boston - Toronto from $241
Flight Boston - Toronto from $240