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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 April , May 2026

28 Apr - 02 May $ 387.00
BOS
Boston
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
BOS
Boston
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14 Apr - 05 May $ 422.00
BOS
Boston
Alaska Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
1 STOPS
BOS
Boston
Pick dates
16 Apr - 09 May $ 518.00
BOS
Boston
Alaska Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
1 STOPS
BOS
Boston
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Last minute flights from Boston to San Francisco

23 Apr - 30 Apr $ 307.00
BOS
Boston
Alaska Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
1 STOPS
BOS
Boston
Pick dates
14 Apr - 30 Apr $ 507.00
BOS
Boston
Alaska Airlines
1 STOPS
SFO
San Francisco
SFO
San Francisco
Alaska Airlines
1 STOPS
BOS
Boston
Pick dates
16 Apr - 30 Apr $ 707.00
BOS
Boston
United Airlines
DIRECT
SFO
San Francisco
SFO
San Francisco
United Airlines
DIRECT
BOS
Boston
Pick dates

One-way flights to San Francisco from Boston

5:30 AM - 5:30 AM
United Airlines
0 Stops
6h 41m
BOS - SFO
$ 149
Kiwi
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4:27 PM - 8:46 PM
Alaska Airlines
1 Stops
9h 16m
BOS - SFO
$ 269
Kiwi
Pick dates
5:30 AM - 5:30 AM
United Airlines
0 Stops
6h 41m
BOS - SFO
$ 309
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.