Alaska AirlinesDepart10:16
Sun, Dec 13BOI → SFO
2h 15m · Direct
$148one way, per person
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- Cheapest fare
- $148
- Cheapest month
- December
- Direct flights
- Yes
- Flight time
- 2h 15m
Alaska Airlines · Sun, Dec 13
from $148
Alaska Airlines
840 km
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Cheapest month to fly from Boise 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.
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About flights from Boise to San Francisco
Boise (BOI) and San Francisco (SFO) are about 840 km apart. Direct flights take around 2h 15m, and recent direct fares were with Alaska Airlines. Over the next few months, one-way fares start from $148, 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 Boise to San Francisco?
The cheapest one-way fare we've seen recently is $148 with Alaska Airlines, departing Sunday, December 13, 2026. Over the coming months, the lowest fare in each month ranges from $148 to $355.
What is the cheapest month to fly from Boise to San Francisco?
December 2026 currently has the lowest fares, from $148 one way.
Are there direct flights from Boise to San Francisco?
Yes. Recent direct fares were with Alaska Airlines.
How long is the flight from Boise to San Francisco?
A direct flight takes about 2h 15m. Boise and San Francisco are around 840 km apart.
Which airlines fly from Boise to San Francisco?
Recent fares on this route were with Alaska Airlines.
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