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Cheap flights from Ontario to Santa Rosa from C$ 440

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 15/11. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ontario to Santa Rosa

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Santa Rosa
Explore the most affordable flight options available from Ontario to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 October 2025.

Wed 12/114:45 p.m.YYZ - STS
2 stops32h 52mAlaska Airlines
Tue 18/1112:00 p.m.STS - YYZ
2 stops24h 35mAlaska Airlines
Deal found 28/10C$ 642
Wed 12/114:45 p.m.YYZ - STS
2 stops32h 52mAlaska Airlines
Wed 19/117:00 a.m.STS - YYZ
2 stops29h 35mAlaska Airlines
Deal found 28/10C$ 654
Thu 13/114:45 p.m.YYZ - STS
1 stop8h 20mAlaska Airlines
Tue 18/1112:00 p.m.STS - YYZ
2 stops24h 35mAlaska Airlines
Deal found 28/10C$ 714
Thu 13/114:45 p.m.YYZ - STS
1 stop8h 20mAlaska Airlines
Wed 19/118:03 p.m.STS - YYZ
2 stops16h 32mAlaska Airlines
Deal found 28/10C$ 725
Fri 14/114:45 p.m.YYZ - STS
1 stop8h 20mAlaska Airlines
Wed 19/117:00 a.m.STS - YYZ
1 stop29h 35mAlaska Airlines
Deal found 28/10C$ 739
Tue 11/114:45 p.m.YYZ - STS
1 stop8h 20mAlaska Airlines
Tue 18/1112:00 p.m.STS - YYZ
2 stops24h 35mAlaska Airlines
Deal found 28/10C$ 741
Sat 15/116:10 a.m.YYZ - STS
1 stop8h 57mAmerican Airlines
Wed 19/111:18 p.m.STS - YYZ
2 stops18h 45mAmerican Airlines
Deal found 28/10C$ 753

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 30 October 2025.

Round-trip from

C$ 647

One-way from

C$ 440

Popular in

December

Cheapest in

April

Average price

C$ 554
14/12-21/12
  • 14/12-21/12
  • 3 total stops
  • 51h 39m total
  • Ontario to Santa Rosa
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 15/11
  • 1 total stop
  • 8h 20m total
  • Ontario to Santa Rosa
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 629,999 searches. Data last updated 30 October 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

Wed 12/11

4:45 p.m.-10:37 p.m.

2 stops32h 52m

Santa Rosa Sonoma County

Wed 19/11

7:00 a.m.-3:35 p.m.

2 stops29h 35m

C$ 654

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 12/11

4:45 p.m.-10:37 p.m.

2 stops32h 52m

Santa Rosa Sonoma County

Tue 18/11

2:22 p.m.-3:35 p.m.

1 stop22h 13m

C$ 665

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 6/4

6:20 p.m.-3:47 p.m.

2 stops24h 27m

Santa Rosa Sonoma County

Wed 8/4

12:46 p.m.-10:40 a.m.

2 stops18h 54m

C$ 702

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 14/11

4:45 p.m.-10:05 p.m.

1 stop8h 20m

Santa Rosa Sonoma County

Tue 18/11

12:00 p.m.-3:35 p.m.

2 stops24h 35m

C$ 714

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 13/11

4:45 p.m.-10:05 p.m.

1 stop8h 20m

Santa Rosa Sonoma County

Wed 19/11

8:03 p.m.-3:35 p.m.

2 stops16h 32m

C$ 725

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 14/11

4:45 p.m.-10:05 p.m.

1 stop8h 20m

Santa Rosa Sonoma County

Wed 19/11

7:00 a.m.-3:35 p.m.

1 stop29h 35m

C$ 739

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 11/11

4:45 p.m.-10:05 p.m.

1 stop8h 20m

Santa Rosa Sonoma County

Wed 19/11

4:51 p.m.-3:35 p.m.

2 stops19h 44m

C$ 753

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 11/11

4:45 p.m.-10:05 p.m.

1 stop8h 20m

Santa Rosa Sonoma County

Tue 18/11

2:22 p.m.-3:35 p.m.

1 stop22h 13m

C$ 757

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 12/11

4:45 p.m.-10:37 p.m.

2 stops32h 52m

Santa Rosa Sonoma County

Thu 20/11

2:22 p.m.-3:35 p.m.

1 stop22h 13m

C$ 765

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 14/11

4:45 p.m.-8:44 a.m.

2 stops18h 59m

Santa Rosa Sonoma County

Sun 23/11

8:15 p.m.-3:35 p.m.

1 stop16h 20m

C$ 814

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 19 results
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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, April is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of C$ 201). Flying from Region of Ontario to Santa Rosa in January is currently the most expensive (average of C$ 355). 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.

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?

    Santa Rosa Sonoma County (STS) is the airport you will fly into if you book a flight from Ontario to Santa Rosa. It is only a 11.5 km journey from Sonoma County (STS) to Santa Rosa’s city centre.

  • How long is the flight from Region of Ontario to Santa Rosa?

    Airlines like Alaska Airlines and American Airlines fly from Region of Ontario to Santa Rosa in about 24h 27m. The time it takes to get you to your destination can typically vary by up to 8h 25m. Region of Ontario and Santa Rosa are separated by a distance of 3621 km. This flight may include one or multiple stops.

  • 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 Toronto Pearson Intl - Santa Rosa Sonoma County, London - 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, April is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of C$ 201). Flying from Region of Ontario to Santa Rosa in January is currently the most expensive (average of C$ 355). 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

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How does Cheapflights help users find flights from Ontario to Santa Rosa?

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Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to Santa Rosa, users can toggle the no change fees filter when performing a flight search.

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