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Cheap flights from Ontario to Santa Rosa from C$ 356

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
17 Apr — 24 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 18 March 2026.

Wed 30/96:46 a.m.
YYZ
-
STS
1 stop8h 26m
American Airlines
Sun 4/104:21 p.m.
STS
-
YYZ
2 stops15h 24m
American Airlines
Deal found 18/3C$ 853
Tue 2/64:55 p.m.
YYZ
-
STS
2 stops28h 24m
Alaska Airlines
Wed 3/68:26 p.m.
STS
-
YYZ
1 stop16h 19m
Alaska Airlines
Deal found 16/3C$ 857
Wed 17/66:18 p.m.
YYZ
-
STS
1 stop20h 47m
American Airlines
Sun 28/61:00 p.m.
STS
-
YYZ
2 stops19h 59m
American Airlines
Deal found 16/3C$ 860
Sat 23/56:18 p.m.
YYZ
-
STS
1 stop20h 47m
American Airlines
Sat 30/54:20 p.m.
STS
-
YYZ
2 stops15h 39m
American Airlines
Deal found 14/3C$ 863
Mon 22/66:26 p.m.
YYZ
-
STS
2 stops21h 04m
American Airlines
Sat 27/64:20 p.m.
STS
-
YYZ
2 stops15h 39m
American Airlines
Deal found 16/3C$ 880
Thu 21/56:46 a.m.
YYZ
-
STS
1 stop8h 19m
American Airlines
Sat 30/54:20 p.m.
STS
-
YYZ
2 stops15h 39m
American Airlines
Deal found 14/3C$ 883
Wed 10/66:46 a.m.
YYZ
-
STS
1 stop8h 19m
American Airlines
Wed 24/612:45 p.m.
STS
-
YYZ
2 stops23h 14m
American Airlines
Deal found 16/3C$ 906
Wed 10/66:46 a.m.
YYZ
-
STS
1 stop8h 19m
American Airlines
Mon 22/612:45 p.m.
STS
-
YYZ
2 stops23h 14m
American Airlines
Deal found 16/3C$ 930

Find 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 18 March 2026.

Round-trip from

C$ 857

One-way from

C$ 356

Popular in

December

Cheapest in

April

Average price

C$ 560
Alaska Airlines
  • Alaska Airlines
  • 2/6-3/6
  • 3 total stops
  • 44h 43m total
  • Ontario to Santa Rosa
Search Deals
29/4
  • 29/4
  • 2 total stops
  • 15h 06m total
  • Ontario to Santa Rosa
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 18 March 2026.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 21/5

6:46 a.m.-12:05 p.m.

1 stop8h 19m

Santa Rosa Sonoma County

Sat 30/5

4:20 p.m.-10:59 a.m.

2 stops15h 39m

C$ 883

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 2/6

4:55 p.m.-11:10 a.m.

2 stops21h 15m

Santa Rosa Sonoma County

Wed 3/6

6:59 p.m.-3:45 p.m.

2 stops17h 46m

C$ 885

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 29/7

8:30 p.m.-5:16 p.m.

1 stop23h 46m

Santa Rosa Sonoma County

Sun 2/8

1:06 p.m.-6:39 a.m.

1 stop14h 33m

C$ 987

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 22/5

4:55 p.m.-5:04 p.m.

2 stops27h 09m

Santa Rosa Sonoma County

Sat 30/5

12:12 p.m.-3:45 p.m.

2 stops24h 33m

C$ 1,064
Cheapest one-way

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 18/6

9:30 a.m.-3:50 p.m.

1 stop9h 20m

C$ 357

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 16/6

9:30 a.m.-3:50 p.m.

1 stop9h 20m

C$ 357

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 2/7

9:30 a.m.-3:48 p.m.

1 stop9h 18m

C$ 359

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sun 10/5

9:30 a.m.-3:53 p.m.

1 stop9h 23m

C$ 359

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 27/4

4:55 p.m.-10:57 p.m.

1 stop9h 02m

C$ 404
Quickest one-way

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 17/6

4:55 p.m.-10:51 p.m.

1 stop8h 56m

C$ 404

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/3

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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, August is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of C$ 218). Flying from Region of Ontario to Santa Rosa in March is currently the most expensive (average of C$ 348). 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 American Airlines and Alaska Airlines fly from Region of Ontario to Santa Rosa in about 8h 19m. The time it takes to get you to your destination can typically vary by up to 12h 56m. 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, August is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of C$ 218). Flying from Region of Ontario to Santa Rosa in March is currently the most expensive (average of C$ 348). 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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Can Cheapflights find flights from Ontario to Santa Rosa with no change fees?

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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