SFO to BOS from $245 in economy

UAUnited Airlines

Round Trip•Economy

SFO

San Francisco International Airport

San Francisco, United States

BOS

Logan International Airport

Boston, United States

$424 USD

-42%$245 USD

Verified 13 days ago

July 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29 30 1 2 3 4 5$552 6$608 7$567 8$507 9$507 10$507 11$507 12$457 13$457 14$457 15$467 16$457 17$457 18$457 19$327 20$320 21$327 22$327 23$327 24$320 25$320 26$368 27$414 28$284 29$255 30$307 31$306 1$348 2$286

Extremely Rare Availability

1% of dates checked are available within 10% of the lowest price

Saturday, July 11th, 2026

5 round-trip options

Returning

Thu, Jul 16, 2026•5 Day Trip

$657 USD

Google Flights

Returning

Fri, Jul 17, 2026•6 Day Trip

$657 USD

Google Flights

Returning

Tue, Jul 21, 2026•10 Day Trip

$517 USD

Google Flights

Returning

Thu, Jul 23, 2026•12 Day Trip

$507 USD

Google Flights

Returning

Sat, Jul 25, 2026•14 Day Trip

$573 USD

Google Flights

San Francisco (SFO) to Boston (BOS) flight deal in economy from $245

San Francisco International Airport

Logan International Airport

July 2026

Saturday, July 11th, 2026