Boston to San Francisco
BOSSFO
Fly from Boston to San Francisco starting at USD 137 with F9.
Best fare available on May 30, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to San Francisco cheapest flights this week
12 May
F9
09:31BOS
22:34SFO
1 Stop$199VIEW DEAL
14 May
F9
09:31BOS
22:34SFO
1 Stop$199VIEW DEAL
25 May
B6
07:13BOS
13:53SFO
Direct$182VIEW DEAL
26 May
AA
17:04BOS
04:18SFO
1 Stop$172VIEW DEAL
27 May
F9
12:01BOS
19:30SFO
2 Stop$151VIEW DEAL
30 May
F9
12:01BOS
22:34SFO
1 Stop$137VIEW DEAL
31 May
B6
06:00BOS
02:04SFO
2 Stop$227VIEW DEAL
1 Jun
B6
21:15BOS
03:57SFO
Direct$172VIEW DEAL
6 Jun
B6
15:40BOS
22:21SFO
Direct$140VIEW DEAL
11 Jun
UA
06:00BOS
12:27SFO
Direct$182VIEW DEAL
Boston to San Francisco monthly flight fare trend
May
from USD 137
Jun
from USD 140
Jul
from USD 109
Aug
from USD 196
Sep
No flights
Oct
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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