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Cheap flights from Boston (BOS) to San Francisco (SFO)

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
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How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)

How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)
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How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)
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How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)
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Cheap flights from Boston to San Francisco in September , October 2026

30 Sep - 31 Oct $ 492.00
BOS
Boston
JetBlue Airways
1 STOPS
SFO
San Francisco
SFO
San Francisco
JetBlue Airways
DIRECT
BOS
Boston
Pick dates
30 Sep - 06 Oct $ 557.00
BOS
Boston
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
BOS
Boston
Pick dates
30 Sep - 10 Oct $ 878.00
BOS
Boston
JetBlue Airways
DIRECT
SFO
San Francisco
SFO
San Francisco
JetBlue Airways
DIRECT
BOS
Boston
Pick dates

Last minute flights from Boston to San Francisco

29 Sep - 01 Oct $ 580.00
BOS
Boston
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
BOS
Boston
Pick dates
30 Sep - 01 Oct $ 696.00
BOS
Boston
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
BOS
Boston
Pick dates
29 Sep - 30 Sep $ 995.00
BOS
Boston
JetBlue Airways
DIRECT
SFO
San Francisco
SFO
San Francisco
JetBlue Airways
DIRECT
BOS
Boston
Pick dates

One-way flights to San Francisco from Boston

12:54 PM - 5:45 PM
Frontier Airlines
1 Stops
10h 14m
BOS - SFO
$ 290
Kiwi
Pick dates
12:52 PM - 5:45 PM
Frontier Airlines
1 Stops
10h 16m
BOS - SFO
$ 290
Kiwi
Pick dates
1:55 PM - 1:55 PM
United Airlines
0 Stops
6h 23m
BOS - SFO
$ 459
Kiwi
Pick dates

How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)

Related info for your journey
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How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Boston (BOS) to San Francisco (SFO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.