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 15 days ago
Extremely Rare Availability
2% of dates checked are available within 10% of the lowest price

Sunday, October 18th, 2026

5 round-trip options

Returning
Fri, Oct 23, 2026•5 Day Trip
$555 USD
Google Flights
Returning
Sat, Oct 24, 2026•6 Day Trip
$530 USD
Google Flights
Returning
Tue, Oct 27, 2026•9 Day Trip
$530 USD
Google Flights
Returning
Wed, Oct 28, 2026•10 Day Trip
$530 USD
Google Flights
Returning
Fri, Oct 30, 2026•12 Day Trip
$555 USD
Google Flights