Boston to San Francisco

BOSSFO

Fly from Boston to San Francisco starting at USD 109 with Frontier Airlines.Best fare available on Jul 22, 2026.Limited seats. Better plans. Book before it's gone.

Boston to San Francisco cheapest flights this week

22 Jul
Frontier Airlines
12:04BOS
22:13SFO
1 StopUSD 109VIEW DEAL
22 Jul
Southwest Airlines
16:45BOS
01:30SFO
1 StopUSD 404VIEW DEAL
23 Jul
Frontier Airlines
11:52BOS
22:18SFO
1 StopUSD 192VIEW DEAL
24 Jul
Frontier Airlines
11:59BOS
22:18SFO
1 StopUSD 223VIEW DEAL
24 Jul
Alaska Airlines
16:54BOS
02:36SFO
1 StopUSD 223VIEW DEAL
25 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 179VIEW DEAL
26 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 210VIEW DEAL
26 Jul
Alaska Airlines
09:00BOS
21:48SFO
1 StopUSD 340VIEW DEAL
27 Jul
United Airlines
07:28BOS
13:55SFO
DirectUSD 179VIEW DEAL
27 Jul
Alaska Airlines
15:26BOS
00:54SFO
1 StopUSD 270VIEW DEAL

Boston to San Francisco monthly flight fare trend

Jul
from USD 109
Aug
from USD 125
Sep
from USD 128
Oct
from USD 134
Nov
No flights
Dec
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

Flights from Boston

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