BOS to SFO from $245 in economy – flightdeals.net

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United Airlines

UAUnited Airlines

Round Trip•Economy

Logan International Airport

Boston, United States

San Francisco International Airport

San Francisco, United States

$409 USD

-40%$245 USD

Verified 14 days ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$276 1$282 2$245 3$276 4$302 5$271 6$302 7$343 8$306 9$297 10$322 11$322 12$297 13$322 14$322 15$322 16$297 17$322 18$322 19$297 20$322 21$322 22$322 23$297 24$322 25$322 26$297 27$322 28$322 29$322 30$297 1$322 2$332 3$307 4$345

Extremely Rare Availability

2% of dates checked are available within 10% of the lowest price

Monday, September 7th, 2026

5 round-trip options

Returning

Sat, Sep 12, 2026•5 Day Trip

$343 USD

Returning

Sun, Sep 13, 2026•6 Day Trip

$368 USD

Returning

Wed, Sep 16, 2026•9 Day Trip

$343 USD

Returning

Thu, Sep 17, 2026•10 Day Trip

$406 USD

Returning

Sat, Sep 19, 2026•12 Day Trip

$343 USD