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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 August , September 2026

29 Aug - 29 Sep $ 394.00
BOS
Boston
JetBlue Airways
1 STOPS
SFO
San Francisco
SFO
San Francisco
JetBlue Airways
DIRECT
BOS
Boston
Pick dates
22 Aug - 11 Sep $ 417.00
BOS
Boston
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
BOS
Boston
Pick dates
29 Aug - 08 Sep $ 563.00
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 Aug - 31 Aug $ 373.00
BOS
Boston
Alaska Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
1 STOPS
BOS
Boston
Pick dates
25 Aug - 01 Sep $ 476.00
BOS
Boston
Frontier Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Frontier Airlines
1 STOPS
BOS
Boston
Pick dates
29 Aug - 31 Aug $ 720.00
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

12:45 PM - 4:45 PM
Frontier Airlines
1 Stops
9h 18m
BOS - SFO
$ 234
Kiwi
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12:45 PM - 4:45 PM
Frontier Airlines
1 Stops
9h 18m
BOS - SFO
$ 234
Kiwi
Pick dates
11:34 AM - 11:34 AM
United Airlines
0 Stops
6h 23m
BOS - SFO
$ 334
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.