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

United AirlinesUAUnited Airlines
Round Trip•Economy
United StatesBOS

Logan International Airport

Boston, United States
United StatesSFO

San Francisco International Airport

San Francisco, United States
$409 USD
-40%$245 USD
Verified 16 days ago
Extremely Rare Availability
2% of dates checked are available within 10% of the lowest price

Monday, November 23rd, 2026

3 round-trip options

Returning
Sat, Nov 28, 2026•5 Day Trip
$849 USD
Google Flights
Returning
Thu, Dec 3, 2026•10 Day Trip
$397 USD
Google Flights
Returning
Mon, Dec 7, 2026•14 Day Trip
$397 USD
Google Flights