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Cheap flights from Santa Rosa to Ontario from C$ 250

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 18/11. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Santa Rosa to Ontario

Keep the following information in mind while searching for Santa Rosa to Ontario flight deals. Data was last updated 28 October 2025.

Round-trip from

C$ 769

One-way from

C$ 250

Popular in

December

Cheapest in

April

Average price

C$ 589
26/11-3/12
  • 26/11-3/12
  • 3 total stops
  • 34h 06m total
  • Santa Rosa to Ontario
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 18/11
  • 2 total stops
  • 16h 32m total
  • Santa Rosa to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 96 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Santa Rosa to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Santa Rosa to Ontario
Explore the most affordable flight options available from Santa Rosa to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 October 2025.

Wed 26/118:15 p.m.STS - YYZ
2 stops22h 38mMultiple Airlines
Wed 3/129:35 a.m.YYZ - STS
1 stop11h 28mMultiple Airlines
Deal found 27/10C$ 769
Tue 30/124:21 p.m.STS - YYZ
2 stops20h 58mAmerican Airlines
Sat 3/15:19 p.m.YYZ - STS
2 stops22h 10mAmerican Airlines
Deal found 26/10C$ 932
Sat 27/124:21 p.m.STS - YYZ
2 stops17h 50mAmerican Airlines
Sat 3/15:19 p.m.YYZ - STS
2 stops22h 10mAmerican Airlines
Deal found 26/10C$ 1,006
Tue 30/1212:59 p.m.STS - YYZ
2 stops24h 20mAmerican Airlines
Fri 2/16:00 a.m.YYZ - STS
2 stops12h 51mAmerican Airlines
Deal found 26/10C$ 1,017
Fri 26/122:24 p.m.STS - YYZ
1 stop22h 11mAlaska Airlines
Sun 4/14:45 p.m.YYZ - STS
1 stop8h 32mAlaska Airlines
Deal found 26/10C$ 1,158
Wed 26/118:15 p.m.STS - YYZ
2 stops11h 37mAlaska Airlines
Wed 3/124:45 p.m.YYZ - STS
2 stops27h 34mAlaska Airlines
Deal found 27/10C$ 1,159
Fri 26/122:24 p.m.STS - YYZ
1 stop22h 11mAlaska Airlines
Fri 2/14:45 p.m.YYZ - STS
1 stop8h 32mAlaska Airlines
Deal found 26/10C$ 1,239
Tue 28/108:03 p.m.STS - YYZ
2 stops16h 32mAlaska Airlines
Sun 2/114:45 p.m.YYZ - STS
1 stop8h 20mAlaska Airlines
Deal found 26/10C$ 1,607
Tue 28/104:17 p.m.STS - YYZ
2 stops17h 18mAmerican Airlines
Sun 2/117:30 a.m.YYZ - STS
2 stops11h 23mAmerican Airlines
Deal found 26/10C$ 1,614

Cheapflights Fare Finder

 
Customize your flight search to find flights from Santa Rosa to Ontario 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 28 October 2025.
Use the filters below to find and compare flights from Santa Rosa to Ontario that are best for you.

Fly from

Santa Rosa

Fly to

Ontario

Route

Depart

Return

Price

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 26/11

8:15 p.m.-9:53 p.m.

2 stops22h 38m

Toronto Pearson Intl

Wed 3/12

9:35 a.m.-6:03 p.m.

1 stop11h 28m

C$ 769

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 7/4

4:17 p.m.-3:00 p.m.

2 stops19h 43m

Toronto Pearson Intl

Wed 8/4

6:40 p.m.-12:17 p.m.

2 stops20h 37m

C$ 825

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 7/4

7:00 p.m.-10:40 a.m.

2 stops12h 40m

Toronto Pearson Intl

Wed 8/4

4:45 p.m.-9:51 p.m.

1 stop8h 06m

C$ 895

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 30/12

4:21 p.m.-4:19 p.m.

2 stops20h 58m

Toronto Pearson Intl

Sat 3/1

5:19 p.m.-12:29 p.m.

2 stops22h 10m

C$ 932

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sat 27/12

4:21 p.m.-1:11 p.m.

2 stops17h 50m

Toronto Pearson Intl

Sat 3/1

5:19 p.m.-12:29 p.m.

2 stops22h 10m

C$ 1,006

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 29/12

12:59 p.m.-10:56 a.m.

2 stops18h 57m

Toronto Pearson Intl

Sat 3/1

6:15 p.m.-12:29 p.m.

2 stops21h 14m

C$ 1,006

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sun 28/12

12:59 p.m.-4:00 p.m.

2 stops24h 01m

Toronto Pearson Intl

Sat 3/1

5:19 p.m.-12:29 p.m.

2 stops22h 10m

C$ 1,006

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sat 27/12

4:21 p.m.-10:16 a.m.

2 stops14h 55m

Toronto Pearson Intl

Fri 2/1

6:23 p.m.-3:51 p.m.

2 stops24h 28m

C$ 1,006

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 29/12

12:59 p.m.-10:56 a.m.

2 stops18h 57m

Toronto Pearson Intl

Sun 4/1

6:24 p.m.-12:29 p.m.

2 stops21h 05m

C$ 1,006

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Sun 12/4

4:17 p.m.-10:50 p.m.

2 stops27h 33m

Montreal Pierre Elliott Trudeau Intl

Tue 14/4

12:30 p.m.-3:47 p.m.

2 stops30h 17m

C$ 1,262

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 18 results
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Best time to book a flight from Santa Rosa to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Santa Rosa 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 Santa Rosa to Ontario

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

Currently, February is the cheapest month in which you can book a flight from Santa Rosa to Region of Ontario (average of C$ 178). Flying from Santa Rosa to Region of Ontario in August is currently the most expensive (average of C$ 284). 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 Santa Rosa to Ontario. 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 from for flights from Santa Rosa to Ontario?

    For a flight from Santa Rosa to Ontario, you will be flying from Sonoma County. Santa Rosa Sonoma County (STS) is just 11.5 km from the centre of the city.

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

    A quick flight from Santa Rosa to Region of Ontario can take about 12h 40m. American Airlines provides one of the quickest options available for as low as C$ 895. The distance between Santa Rosa and Region of Ontario is about 3621 km. Both multi-stop and direct flights can be found to your destination and back.

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

    The most popular route from Santa Rosa to Region of Ontario is Santa Rosa Sonoma County - Toronto Region of Waterloo Intl. You may also consider Santa Rosa Sonoma County - Sudbury or Santa Rosa Sonoma County - Montreal Pierre Elliott Trudeau Intl.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Santa Rosa to Ontario 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 Santa Rosa to Region of Ontario?

    Currently, February is the cheapest month in which you can book a flight from Santa Rosa to Region of Ontario (average of C$ 178). Flying from Santa Rosa to Region of Ontario in August is currently the most expensive (average of C$ 284). 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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Users can book flights with no change fees policies with our dedicated filters. Book flights from Santa Rosa to Ontario flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Santa Rosa to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Santa Rosa to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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