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 17 days ago

December 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30$767 1$492 2$397 3$397 4$397 5$397 6$397 7$397 8$397 9$397 10$397 11$397 12$397 13$397 14$397 15$397 16$397 17$580 18$745 19$397 20$547 21$427 22$547 23$693 24$427 25$463 26$767 27$767 28$580 29$569 30$463 31$463 1$482 2$590 3$547

Extremely Rare Availability

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

Monday, December 21st, 2026

3 round-trip options

Returning

Sat, Dec 26, 2026•5 Day Trip

$427 USD

Returning

Thu, Dec 31, 2026•10 Day Trip

$427 USD

Returning

Mon, Jan 4, 2027•14 Day Trip

$427 USD