Cheap flights from Ontario to Santa Rosa

One-way fares from $230 · ONT → STS · prices found by travellers in the last 48 hours

Compare all dates Santa Rosa → Ontario
Cheapest fare
$230

American Airlines · Mon, Dec 28

Cheapest month
December

from $230

Direct flights
Not recently

Usually 1+ stop

Quickest trip
3h 43m

670 km

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Cheapest month to fly from Ontario to Santa Rosa

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $336
  2. December 2026 Cheapest $230

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Getting around

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About flights from Ontario to Santa Rosa

Ontario (ONT) and Santa Rosa (STS) are about 670 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 3h 43m. Over the next few months, one-way fares start from $230, 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 Ontario to Santa Rosa?

The cheapest one-way fare we've seen recently is $230 with American Airlines, departing Monday, December 28, 2026. Over the coming months, the lowest fare in each month ranges from $230 to $336.

What is the cheapest month to fly from Ontario to Santa Rosa?

December 2026 currently has the lowest fares, from $230 one way.

Are there direct flights from Ontario to Santa Rosa?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Ontario to Santa Rosa?

The quickest journey we've seen takes about 3h 43m. Ontario and Santa Rosa are around 670 km apart.

Which airlines fly from Ontario to Santa Rosa?

Recent fares on this route were with American Airlines.

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