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Santa Rosa

$258+ Cheap flights from Ontario to Santa Rosa (STS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
1 adult, Economy
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Cheap flight deals from Ontario to Santa Rosa

Keep the following information in mind while searching for Ontario to Santa Rosa flight deals. Data was last updated April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

July

Cheapest in

February

Average price

$370
Provider with most accurate pricing for Toronto (YTO)-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-San Francisco flights.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Ontario to Santa Rosa

One-way flights from Ontario to Santa Rosa
Search for one-way flight options from Ontario to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated April 1, 2025.

This Trip.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/159:45 amYYZ - STS
1 stop16h 45mMultiple Airlines
Deal found 3/31$258
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:45 amYUL - STS
3 stops38h 33mMultiple Airlines
Deal found 3/31$290
This American Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/153:44 pmYUL - STS
1 stop23h 00mAmerican Airlines
Deal found 3/31$345

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Santa Rosa that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 1, 2025.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.

Fly from

Ontario

Fly to

Santa Rosa

Route

Depart

Return

Price

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 5/15

9:45 am-11:30 pm

1 stop16h 45m

$258

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Thu 5/15

6:45 am-6:18 pm

3 stops38h 33m

$290

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Thu 5/15

3:44 pm-11:44 am

1 stop23h 00m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Best time to book a flight from Ontario to Santa Rosa

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

Cheapflights Insights

Everything you need to know about your flight from Ontario to Santa Rosa

What is the cheapest month to book a flight from Region of Ontario to Santa Rosa?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of $202). Flying from Region of Ontario to Santa Rosa in June is currently the most expensive (average of $395). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average rainfall totals by month.

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.

Temperature in Santa Rosa by month

Plan your trip to Santa Rosa by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Santa Rosa

Get insights into the airlines that provide service to Santa Rosa. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Santa Rosa. Reviews last updated April 1, 2025.
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Crew

8.0

Entertainment

6.9

Food

6.5

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Crew

8.0

Entertainment

6.9

Food

6.5

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2024

LHR - SAN

This was the best flight I have experienced in all the years I have been f doing this journey with BA. Flight, food and service A1. Well done BA.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Santa Rosa. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Santa Rosa from Ontario?

    Located just 7.2 mi from the city center, Santa Rosa Sonoma County (STS) is the airport most travelers will use when flying to Santa Rosa from Ontario.

  • What are the most popular routes from Region of Ontario to Santa Rosa?

    When deciding which route to take from Region of Ontario to Santa Rosa consider Montreal Pierre Elliott Trudeau Intl - Santa Rosa Sonoma County, Toronto Pearson Intl - Santa Rosa Sonoma County or Hamilton - Santa Rosa Sonoma County as they are the most popular.

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

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

  • How can I find direct flights from Ontario to Santa Rosa?

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

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

    Yes. Cheapflights offers flight deals from Ontario 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.

  • What is the cheapest month to book a flight from Region of Ontario to Santa Rosa?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of $202). Flying from Region of Ontario to Santa Rosa in June is currently the most expensive (average of $395). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Fort Bragg
Ukiah
Mendocino

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