Boston to San Francisco
BOSSFO
Fly from Boston to San Francisco starting at SAR 344 with Frontier Airlines.
Best fare available on Oct 3, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to San Francisco cheapest flights this week
Boston to San Francisco monthly flight fare trend
Sep
from SAR 1,203
Oct
from SAR 344
Nov
from SAR 481
Dec
No flights
Jan
No flights
Feb
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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