cached prices · United States fares · USD
The cheapest one-way fare from Seattle to San Francisco we have seen is $77 USD, departing Nov 18 (found Sep 23): United UA 677, Nonstop, 2h15m.
Cheapest seen · One wayfound Sep 23
$77 USD
United UA 677 · Nov 18 · Nonstop · 2h15m
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Cheapest round trip seen
$270 USD
Frontier F9 3406 · Oct 9 → Oct 13 · 1 stop · 10h01m in all, both ways
about this route
By month, Nov 2026 is the cheapest we hold at $77 USD and Jun 2027 the most expensive at $161 USD — a spread of 109%.
Nonstop fares are held for 8 of the 8 departure dates seen; carriers seen: Alaska Airlines, Frontier, United.
SEA serves Seattle, United States; SFO serves San Francisco, United States.
Seattle and San Francisco keep the same clock.
by month
Sep 2026
$152 USD
checked Sep 25
Oct 2026
$79 USD
checked Sep 25
Nov 2026
$77 USD
checked Sep 25
Feb 2027
$110 USD
checked Sep 25
Jun 2027
$161 USD
checked Sep 25
by date
12 rows held, cheapest first — the cheapest nonstop and the cheapest with stops seen for each departure date.
Nov 18 · 17:23 SEA
UA677Nonstop · 2h15m
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 24 · 13:55 SEA
AS688Nonstop · 2h13m
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 25 · 06:39 SEA
AS725Nonstop · 2h10m
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 28 · 20:29 SEA
UA5415Nonstop · 2h30m
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 9 · 16:27 SEA
F934061 stop · 7h48m
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 9 · 20:36 SEA
AS590Nonstop · 2h13m
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 26 · 16:27 SEA
F934061 stop · 7h47m
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 25 · 16:27 SEA
F934062 stops · 15h47m
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 27 · 21:45 SEA
F942041 stop · 34h29m
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 25 · 07:18 SEA
AS725Nonstop · 2h19m
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 27 · 07:18 SEA
AS725Nonstop · 2h19m
found Sep 21 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 26 · 13:22 SEA
UA2281Nonstop · 2h15m
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
round trips
The cheapest out-and-back pairs the cache holds, any dates.
Nov 3 → Nov 3 · 11:43 SEA
AS655Nonstop · 4h39m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 27 → Oct 29 · 11:54 SEA
AS655Nonstop · 4h49m in all, both ways
found Sep 24 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 30 → Nov 1 · 17:59 SEA
AS1385Nonstop · 4h32m in all, both ways
found Sep 25 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 9 → Oct 13 · 16:27 SEA
F934061 stop · 10h01m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 9 → Oct 13 · 19:36 SEA
AS619Nonstop · 4h27m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 9 → Oct 12 · 16:27 SEA
F934062 stops · 31h08m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Oct 9 → Oct 12 · 17:59 SEA
AS1385Nonstop · 4h31m in all, both ways
found Sep 22 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 30 → Oct 1 · 10:53 SEA
F922762 stops · 38h08m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Sep 30 → Oct 1 · 07:11 SEA
UA499Nonstop · 4h32m in all, both ways
found Sep 23 · baggage and fare rules are shown by the seller — this price is the cached fare only
a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
carriers
Marketing carriers; the operating airline is shown by the seller.
questions
more routes
Return: Flights from San Francisco (SFO) to Seattle (SEA) →Every route from Seattle →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.