Alaska AirlinesDepart06:00
Mon, Dec 7SFO → SEA
2h 16m · Direct
$68one way, per person
View deal
- Cheapest fare
- $68
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 2h 14m
Alaska Airlines · Mon, Dec 7
from $68
Alaska Airlines
1,090 km
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Cheapest month to fly from San Francisco to Seattle
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 AirlinesDepart12:39
Sun, Dec 6SFO → SEA
2h 16m · Direct
$118one way, per person
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About flights from San Francisco to Seattle
San Francisco (SFO) and Seattle (SEA) are about 1,090 km apart. Direct flights take around 2h 14m, and recent direct fares were with Alaska Airlines. Over the next few months, one-way fares start from $68, 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 San Francisco to Seattle?
The cheapest one-way fare we've seen recently is $68 with Alaska Airlines, departing Monday, December 7, 2026. Over the coming months, the lowest fare in each month ranges from $68 to $120.
What is the cheapest month to fly from San Francisco to Seattle?
December 2026 currently has the lowest fares, from $68 one way.
Are there direct flights from San Francisco to Seattle?
Yes. Recent direct fares were with Alaska Airlines.
How long is the flight from San Francisco to Seattle?
A direct flight takes about 2h 14m. San Francisco and Seattle are around 1,090 km apart.
Which airlines fly from San Francisco to Seattle?
Recent fares on this route were with Alaska Airlines.
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