Seattle to San Francisco flights
The cheapest round trip we found from Seattle to San Francisco is $102 (Dec 6 – 12, Nonstop), 51% below the usual $210.
SEA to SFO · Round trip · Economy · Prices per person in USD · Price found (3 days ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $288 |
| December 2026 | $102 (cheapest month) |
| January 2027 | $202 |
| February 2027 | $217 |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 6 – 12 6 nights · leave Sun$102 −51% vs usual$102 −51% vs usual Book
Alaska Airlines Nonstop · 2h 07m -
Dec 31 – Jan 4, 2027 4 nights · leave Thu$197 −6% vs usual$197 −6% vs usual Book
Alaska Airlines Nonstop · 2h 18m
-
Jan 24 – 29, 2027 5 nights · leave Sun$249 +19% vs usual$249 +19% vs usual Book
Frontier Airlines 1 stop · 4h 32m -
Jan 10 – 17, 2027 7 nights · leave Sun$258 +23% vs usual$258 +23% vs usual Book
Alaska Airlines Nonstop · 2h 11m
-
Nov 30 – Dec 2 2 nights · leave Mon$288 +37% vs usual$288 +37% vs usual Book
Frontier Airlines 1 stop · 4h 21m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Things to do in San Francisco
One Go City pass for Golden Gate Bay Cruise, Exploratorium, Filoli and more
- All-Inclusive Pass Unlimited Visit as many attractions as you like for 1–5 days from $109 See pass
- Explorer Pass Pick 2–5 of 25 attractions from $89 See pass
- Essentials Pass A few top attractions, chosen as you go from $74 See pass
Go City prices checked Oct 23, 2026; the final price is on Go City. Partner links: we may earn a commission if you book, at no extra cost to you.
Plan the rest of your trip
San Francisco · Dec 6 – 12Partner links: we may earn a commission if you book, at no extra cost to you.
Good to know
More from Seattle
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- Ontario $175 −20%
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Flights to San Francisco from other cities
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- Ontario $45 −67%
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Seattle to San Francisco: questions
How much does a flight from Seattle to San Francisco cost?
The cheapest round trip we have found right now is $102, leaving December 6 and returning December 12. The usual price on this route is about $210, so this fare is 51% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Seattle to San Francisco?
December 2026, with round trips from $102. The most expensive month in our data is November (from $288). Based on the 4 months ahead we have prices for.
Which airports do Seattle to San Francisco flights use?
Seattle airports include Seattle-Tacoma International (SEA) and Boeing Field International (BFI). San Francisco airports include San Francisco International (SFO). The prices on this page cover every airport in both cities (SEA and SFO are the city codes).
About this route
We track round-trip economy fares from Seattle (United States) to San Francisco (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $102, departing December 6 and returning December 12 on a nonstop flight, about 51% below the usual $210. Right now we're following 5 upcoming date combinations on this route. The cheapest month to fly in our data is December, from $102. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.