cached prices · United States fares · USD
The cheapest one-way fare from Boston to San Francisco we have seen is $196 USD, departing Nov 10 (found Sep 25): JetBlue B6 633, Nonstop, 6h44m.
Cheapest seen · One wayfound Sep 25
$196 USD
JetBlue B6 633 · Nov 10 · Nonstop · 6h44m
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Cheapest round trip seen
$361 USD
Alaska Airlines AS 288 · Oct 29 → Nov 1 · 2 stops · 20h21m in all, both ways
about this route
By month, Nov 2026 is the cheapest we hold at $164 USD and Jun 2027 the most expensive at $254 USD — a spread of 55%.
Nonstop fares are held for 6 of the 6 departure dates seen; carriers seen: American Airlines, Alaska Airlines, JetBlue, Frontier, P3, United.
BOS serves Boston, United States; SFO serves San Francisco, United States.
San Francisco runs 3 hours behind Boston.
by month
Sep 2026
$225 USD
checked Sep 26
Oct 2026
$243 USD
checked Sep 26
Nov 2026
$164 USD
checked Sep 26
Jan 2027
$205 USD
checked Sep 26
Feb 2027
$191 USD
checked Sep 26
May 2027
$201 USD
checked Sep 26
Jun 2027
$254 USD
checked Sep 26
by date
8 rows held, cheapest first — the cheapest nonstop and the cheapest with stops seen for each departure date.
Nov 10 · 06:15 BOS
B6633Nonstop · 6h44m
found Sep 25 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Sep 26 · 08:00 BOS
AS2561 stop · 55h25m
found Sep 20 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Oct 18 · 06:00 BOS
AA15401 stop · 8h42m
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Oct 18 · 06:00 BOS
UA2441Nonstop · 6h30m
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Sep 30 · 10:00 BOS
B6833Nonstop · 6h27m
found Sep 20 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Sep 26 · 07:10 BOS
B6633Nonstop · 6h26m
found Sep 20 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Oct 1 · 21:30 BOS
B6413Nonstop · 6h26m
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Sep 28 · 21:30 BOS
B6413Nonstop · 6h26m
found Sep 19 · baggage and fare rules are shown by the seller — this price is the cached fare only
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round trips
The cheapest out-and-back pairs the cache holds, any dates.
Oct 29 → Nov 1 · 16:58 BOS
AS2882 stops · 20h21m in all, both ways
found Sep 26 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Oct 23 → Oct 25 · 16:30 BOS
B6733Nonstop · 12h09m in all, both ways
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Oct 29 → Nov 1 · 07:10 BOS
UA1023Nonstop · 12h25m in all, both ways
found Sep 26 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Jan 6 → Jan 9 · 16:35 BOS
B6192 stops · 36h51m in all, both ways
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Jan 6 → Jan 9 · 06:00 BOS
B61633Nonstop · 12h21m in all, both ways
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Dec 15 → Dec 19 · 06:00 BOS
B61633Nonstop · 12h21m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Feb 14 → Feb 20 · 20:15 BOS
UA2107Nonstop · 12h46m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Nov 24 → Nov 29 · 09:50 BOS
P326164 stops · 56h35m in all, both ways
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
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Nov 24 → Nov 29 · 07:55 BOS
B6133Nonstop · 12h25m in all, both ways
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
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carriers
Marketing carriers; the operating airline is shown by the seller.
questions
more routes
Return: Flights from San Francisco (SFO) to Boston (BOS) →Every route from Boston →Every route to San Francisco →
Other destinations with a cached fare from this origin, cheapest first.
Other origins with a cached fare to this destination, cheapest first.