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Cheap flights from Ontario to Santa Rosa from C$ 296

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
15 Oct — 22 Oct1
1 adult
1 adult, Economy

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 15 September 2025.

Round-trip from

C$ 638

One-way from

C$ 296

Popular in

December

Cheapest in

April

Average price

C$ 569
American Airlines
  • American Airlines
  • 16/10-20/10
  • 4 total stops
  • 42h 10m total
  • Ontario to Santa Rosa
Search Deals
14/10
  • 14/10
  • 3 total stops
  • 38h 26m total
  • Ontario to Santa Rosa
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Ontario to Santa Rosa

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 15 September 2025.

Thu 16/105:59 p.m.YYZ - STS
2 stops21h 02mAmerican Airlines
Mon 20/104:17 p.m.STS - YYZ
2 stops21h 08mAmerican Airlines
Deal found 13/9C$ 638
Fri 17/104:45 p.m.YYZ - STS
1 stop23h 51mAlaska Airlines
Mon 20/102:30 p.m.STS - YYZ
1 stop21h 30mAlaska Airlines
Deal found 13/9C$ 786
Thu 16/104:45 p.m.YYZ - STS
2 stops33h 48mAlaska Airlines
Mon 20/102:30 p.m.STS - YYZ
1 stop21h 30mAlaska Airlines
Deal found 13/9C$ 807
Fri 17/104:45 p.m.YYZ - STS
1 stop23h 51mAlaska Airlines
Sun 19/107:05 a.m.STS - YYZ
1 stop28h 55mAlaska Airlines
Deal found 13/9C$ 959
Thu 16/106:49 a.m.YYZ - STS
1 stop8h 12mAmerican Airlines
Sun 19/104:17 p.m.STS - YYZ
2 stops15h 53mAmerican Airlines
Deal found 13/9C$ 1,127
Fri 17/106:49 a.m.YYZ - STS
2 stops11h 58mAmerican Airlines
Sun 19/104:17 p.m.STS - YYZ
2 stops15h 53mAmerican Airlines
Deal found 13/9C$ 1,253

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 15 September 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 16/10

5:59 p.m.-12:01 p.m.

2 stops21h 02m

Santa Rosa Sonoma County

Mon 20/10

4:17 p.m.-4:25 p.m.

2 stops21h 08m

C$ 638

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 17/10

4:45 p.m.-1:36 p.m.

1 stop23h 51m

Santa Rosa Sonoma County

Mon 20/10

2:30 p.m.-3:00 p.m.

1 stop21h 30m

C$ 786

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 16/10

4:45 p.m.-11:33 p.m.

2 stops33h 48m

Santa Rosa Sonoma County

Mon 20/10

2:30 p.m.-3:00 p.m.

1 stop21h 30m

C$ 807

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 17/10

4:45 p.m.-1:36 p.m.

1 stop23h 51m

Santa Rosa Sonoma County

Sun 19/10

7:05 a.m.-3:00 p.m.

1 stop28h 55m

C$ 959

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 16/10

6:49 a.m.-12:01 p.m.

1 stop8h 12m

Santa Rosa Sonoma County

Sun 19/10

4:17 p.m.-11:10 a.m.

2 stops15h 53m

C$ 1,127

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 17/10

6:49 a.m.-3:47 p.m.

2 stops11h 58m

Santa Rosa Sonoma County

Sun 19/10

4:17 p.m.-11:10 a.m.

2 stops15h 53m

C$ 1,253

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 14/10

6:45 a.m.-6:11 p.m.

3 stops38h 26m

C$ 296

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 15/10

8:00 a.m.-10:06 p.m.

2 stops17h 06m

C$ 304

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 9/3

4:45 p.m.-9:58 p.m.

1 stop8h 13m

C$ 323

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 12/3

4:45 p.m.-9:58 p.m.

1 stop8h 13m

C$ 323

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

Showing 1-10 of 16 results
1
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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
No data available for this route at this time. Please check back soon.

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 21h 02m. The time it takes to get you to your destination can typically vary by up to 2h 49m. 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.

See more FAQs

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