Boston to San Francisco

BOSSFO

Fly from Boston to San Francisco starting at SAR 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

6 Jun
JetBlue Airways
15:40BOS
22:21SFO
DirectSAR 140VIEW DEAL
11 Jun
United Airlines
06:00BOS
12:27SFO
DirectSAR 182VIEW DEAL
20 Jun
American Airlines
07:00BOS
15:58SFO
1 StopSAR 207VIEW DEAL
22 Jul
Frontier Airlines
12:04BOS
22:13SFO
1 StopSAR 109VIEW DEAL
23 Jul
Frontier Airlines
09:14BOS
22:13SFO
1 StopSAR 140VIEW DEAL
30 Jul
Frontier Airlines
09:14BOS
22:13SFO
1 StopSAR 136VIEW DEAL
6 Aug
Southwest Airlines
08:40BOS
20:35SFO
1 StopSAR 196VIEW DEAL
7 Aug
Southwest Airlines
11:15BOS
23:30SFO
1 StopSAR 217VIEW DEAL

Boston to San Francisco monthly flight fare trend

Jun
from SAR 140
Jul
from SAR 109
Aug
from SAR 196
Sep
No flights
Oct
No flights
Nov
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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