Frontier AirlinesDepart10:29
Tue, Dec 15SFO → AUS
4h 29m · 1 stop
$77one way, per person
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- Cheapest fare
- $77
- Cheapest month
- December
- Direct flights
- Not recently
- Quickest trip
- 4h 29m
Frontier Airlines · Tue, Dec 15
from $77
Usually 1+ stop
2,410 km
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Cheapest month to fly from San Francisco to Austin
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.
Frontier AirlinesFrontier AirlinesDepart20:26
Fri, Dec 11SFO → AUS
4h 51m · 1 stop
$103one way, per person
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About flights from San Francisco to Austin
San Francisco (SFO) and Austin (AUS) are about 2,410 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 4h 29m. Over the next few months, one-way fares start from $77, 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 Austin?
The cheapest one-way fare we've seen recently is $77 with Frontier Airlines, departing Tuesday, December 15, 2026. Over the coming months, the lowest fare in each month ranges from $77 to $100.
What is the cheapest month to fly from San Francisco to Austin?
December 2026 currently has the lowest fares, from $77 one way.
Are there direct flights from San Francisco to Austin?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from San Francisco to Austin?
The quickest journey we've seen takes about 4h 29m. San Francisco and Austin are around 2,410 km apart.
Which airlines fly from San Francisco to Austin?
Recent fares on this route were with Frontier Airlines.
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