In terms of precipitation, rainfall in Santa Rosa ranges from 0.0 - 7.1 inches per month. January is typically the wettest month, when rainfall can reach 7.1 in. July is typically the driest time to visit Santa Rosa when rainfall is around 0.0 in.

If weather is an important factor for your trip to Santa Rosa, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 46.4 F).

What is the cheapest time of day to fly from PIA to STS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Peoria, Illinois to Santa Rosa as you normally would.

Can I find deals for flights from Peoria to Santa Rosa that include hotel bookings?

Yes. In addition to deals on Peoria to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Peoria to Santa Rosa?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Peoria to Santa Rosa.

Can I find deals for business class flights from Peoria to Santa Rosa?

Yes. Cheapflights offers flight deals from Peoria to Santa Rosa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$519+ Cheap Flights from Peoria, IL to Santa Rosa

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Cheap flight deals from Peoria to Santa Rosa

One-way

One-way flights from Peoria to Santa Rosa
Search for one-way flight options from Peoria to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.

Tue 11/106:44 am -

1 stop7h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/9

$519

Find flight deals from Peoria to Santa Rosa

Most accurate provider	FlightHub 3 stars
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Popular in	January
Cheapest in	October
Average price	$413

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Highest demand for flights based on searches. 5% potential increase in price ($29 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PeoriaSanta Rosa

PIA Greater Peoria - STS Santa Rosa Sonoma County

PIASTS

Greater Peoria

Tue 11/10

6:44 am-12:14 pm

1 stop7h 30m

Santa Rosa Sonoma County

Wed 12/31

12:00 am-2:00 am

Nonstop0h 00m

$519

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Sorted by cheapest first

Best time to book a flight from Peoria to Santa Rosa

Have a flexible travel schedule? Discover the best time to fly to Santa Rosa from Peoria with our price prediction graph.

PIA-STS

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Can I find deals for flights from Peoria to Santa Rosa that include hotel bookings?
Yes. In addition to deals on Peoria to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Peoria to Santa Rosa?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Peoria to Santa Rosa.
Can I find deals for business class flights from Peoria to Santa Rosa?
Yes. Cheapflights offers flight deals from Peoria to Santa Rosa by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$519+ Cheap flights from Peoria, IL to Santa Rosa (PIA - STS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Peoria to Santa Rosa with Cheapflights

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Cheap flight deals from Peoria to Santa Rosa

One-way flights from Peoria to Santa RosaSearch for one-way flight options from Peoria to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.

Search for one-way flight options from Peoria to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.

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Best time to book a flight from Peoria to Santa Rosa

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Related info for your journey

Can I find deals for flights from Peoria to Santa Rosa that include hotel bookings?

How can I find direct flights from Peoria to Santa Rosa?

Can I find deals for business class flights from Peoria to Santa Rosa?

Traveling to a place near Santa Rosa?

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Peoria and Santa Rosa flights

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One-way flights from Peoria to Santa Rosa
Search for one-way flight options from Peoria to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.