Boston to San Francisco

BOSSFO

Fly from Boston to San Francisco starting at USD 87 with Frontier Airlines.Best fare available on Aug 21, 2026.Limited seats. Better plans. Book before it's gone.

Boston to San Francisco cheapest flights this week

20 Aug
American Airlines
17:45BOS
02:45SFO
1 StopUSD 174VIEW DEAL
21 Aug
Frontier Airlines
12:45BOS
22:03SFO
1 StopUSD 87VIEW DEAL
22 Aug
Frontier Airlines
12:45BOS
22:03SFO
1 StopUSD 244VIEW DEAL
23 Aug
American Airlines
05:32BOS
15:14SFO
1 StopUSD 147VIEW DEAL
24 Aug
American Airlines
17:45BOS
02:45SFO
1 StopUSD 174VIEW DEAL
25 Aug
American Airlines
13:28BOS
22:56SFO
1 StopUSD 174VIEW DEAL
26 Aug
United Airlines
11:34BOS
17:57SFO
DirectUSD 125VIEW DEAL
27 Aug
JetBlue Airways
16:30BOS
03:38SFO
1 StopUSD 127VIEW DEAL
27 Aug
Frontier Airlines
12:45BOS
22:03SFO
1 StopUSD 131VIEW DEAL
28 Aug
Frontier Airlines
12:45BOS
22:03SFO
1 StopUSD 131VIEW DEAL

Boston to San Francisco monthly flight fare trend

Aug
from USD 87
Sep
from USD 124
Oct
from USD 93
Nov
from USD 130
Dec
No flights
Jan
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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