Alaska AirlinesDepart08:46
Wed, Dec 9SEA → SFO
2h 16m · Direct
$67one way, per person
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- Cheapest fare
- $67
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 2h 11m
Alaska Airlines · Wed, Dec 9
from $67
Alaska Airlines
1,090 km
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Cheapest month to fly from Seattle to San Francisco
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in December 2026
The lowest fares we've seen for each day, cheapest first.
Alaska AirlinesAlaska AirlinesDepart12:10
Wed, Dec 16SEA → SJC
2h 17m · Direct
$70one way, per person
View deal
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About flights from Seattle to San Francisco
Seattle (SEA) and San Francisco (SFO) are about 1,090 km apart. Direct flights take around 2h 11m, and recent direct fares were with Alaska Airlines. Over the next few months, one-way fares start from $67, and December 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Seattle to San Francisco?
The cheapest one-way fare we've seen recently is $67 with Alaska Airlines, departing Wednesday, December 9, 2026. Over the coming months, the lowest fare in each month ranges from $67 to $506.
What is the cheapest month to fly from Seattle to San Francisco?
December 2026 currently has the lowest fares, from $67 one way.
Are there direct flights from Seattle to San Francisco?
Yes. Recent direct fares were with Alaska Airlines.
How long is the flight from Seattle to San Francisco?
A direct flight takes about 2h 11m. Seattle and San Francisco are around 1,090 km apart.
Which airlines fly from Seattle to San Francisco?
Recent fares on this route were with Alaska Airlines and Air Canada.
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