Boston to San Francisco
BOSSFO
Fly from Boston to San Francisco starting at USD 161 with AS.
Best fare available on May 2, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to San Francisco cheapest flights this week
2 May
AS
07:00BOS
--:--SFO
1 Stop$161VIEW DEAL
Boston to San Francisco monthly flight fare trend
Apr
No flights
May
from USD 161
Jun
No flights
Jul
No flights
Aug
No flights
Sep
No flights
Airport Details
Origin
Boston
Logan International Airport (BOS)
Boston, BOS
Zone
New York
Elev
20 ft
Destination
San Francisco
San Francisco International Airport (SFO)
San Francisco, SFO
Zone
Los Angeles
Elev
13 ft
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