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

15 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 155VIEW DEAL
16 Jul
JetBlue Airways
06:35BOS
13:05SFO
DirectUSD 138VIEW DEAL
16 Jul
United Airlines
20:20BOS
02:57SFO
DirectUSD 156VIEW DEAL
22 Jul
Frontier Airlines
12:04BOS
22:13SFO
1 StopUSD 109VIEW DEAL
23 Jul
Frontier Airlines
09:14BOS
22:13SFO
1 StopUSD 140VIEW DEAL
25 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 179VIEW DEAL
26 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 210VIEW DEAL
27 Jul
United Airlines
07:28BOS
13:55SFO
DirectUSD 179VIEW DEAL
28 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 171VIEW DEAL
29 Jul
United Airlines
06:00BOS
12:27SFO
DirectUSD 152VIEW DEAL

Boston to San Francisco monthly flight fare trend

Jul
from USD 109
Aug
from USD 125
Sep
from USD 184
Oct
No flights
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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