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Cheap flights from Santa Rosa to Ontario from C$ 248

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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 565

One-way from

C$ 248

Popular in

December

Cheapest in

April

Average price

C$ 625
9/10-13/10
  • 9/10-13/10
  • 2 total stops
  • 27h 43m total
  • Santa Rosa to Ontario
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 6/12
  • 2 total stops
  • 20h 31m total
  • Santa Rosa to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 113 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 September 2025
Search Deals

Find flight deals from Santa Rosa to Ontario

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 11 September 2025.

Thu 9/107:00 a.m.STS - YYZ
1 stop11h 50mMultiple Airlines
Mon 13/1010:40 a.m.YYZ - STS
1 stop15h 53mMultiple Airlines
Deal found 11/9C$ 565
Sat 4/102:30 p.m.STS - YYZ
1 stop21h 30mAlaska Airlines
Tue 7/104:45 p.m.YYZ - STS
1 stop8h 21mAlaska Airlines
Deal found 11/9C$ 662
Fri 3/102:28 p.m.STS - YYZ
1 stop21h 32mAlaska Airlines
Wed 8/104:45 p.m.YYZ - STS
1 stop8h 21mAlaska Airlines
Deal found 11/9C$ 721
Fri 3/107:00 a.m.STS - YYZ
1 stop29h 00mAlaska Airlines
Tue 7/104:45 p.m.YYZ - STS
2 stops19h 18mAlaska Airlines
Deal found 11/9C$ 783
Sat 4/106:51 p.m.STS - YYZ
2 stops17h 09mAlaska Airlines
Wed 8/104:45 p.m.YYZ - STS
1 stop8h 21mAlaska Airlines
Deal found 11/9C$ 794
Mon 6/104:17 p.m.STS - YYZ
2 stops16h 42mAmerican Airlines
Tue 7/103:49 p.m.YYZ - STS
2 stops23h 32mAmerican Airlines
Deal found 11/9C$ 802
Wed 26/114:23 p.m.STS - YUL
2 stops43h 41mAmerican Airlines
Thu 4/122:29 p.m.YUL - STS
2 stops48h 58mAmerican Airlines
Deal found 10/9C$ 1,127
Wed 26/114:23 p.m.STS - YUL
2 stops43h 41mAmerican Airlines
Wed 3/127:30 a.m.YUL - STS
2 stops35h 26mAmerican Airlines
Deal found 10/9C$ 1,189
Thu 27/1112:37 p.m.STS - YUL
2 stops23h 27mAmerican Airlines
Sat 6/127:30 a.m.YUL - STS
2 stops31h 57mAmerican Airlines
Deal found 10/9C$ 1,251
Fri 28/1112:37 p.m.STS - YUL
2 stops20h 38mAmerican Airlines
Thu 4/122:29 p.m.YUL - STS
2 stops48h 58mAmerican Airlines
Deal found 10/9C$ 1,293
Tue 25/114:23 p.m.STS - YUL
2 stops41h 06mAmerican Airlines
Fri 5/127:00 a.m.YUL - STS
2 stops32h 27mAmerican Airlines
Deal found 10/9C$ 1,300
Fri 17/104:17 p.m.STS - YUL
2 stops19h 32mAmerican Airlines
Sun 19/103:44 p.m.YUL - STS
1 stop23h 17mAmerican Airlines
Deal found 11/9C$ 1,321

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 11 September 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

Sat 4/10

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

1 stop21h 30m

Toronto Pearson Intl

Tue 7/10

4:45 p.m.-10:06 p.m.

1 stop8h 21m

C$ 662

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sat 4/10

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

1 stop21h 30m

Toronto Pearson Intl

Wed 8/10

4:45 p.m.-10:06 p.m.

1 stop8h 21m

C$ 662

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 3/10

2:28 p.m.-3:00 p.m.

1 stop21h 32m

Toronto Pearson Intl

Tue 7/10

4:45 p.m.-10:06 p.m.

1 stop8h 21m

C$ 721

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 6/10

4:17 p.m.-11:59 a.m.

2 stops16h 42m

Toronto Pearson Intl

Tue 7/10

3:49 p.m.-12:21 p.m.

2 stops23h 32m

C$ 802

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 7/10

4:17 p.m.-2:30 p.m.

2 stops19h 13m

Toronto Pearson Intl

Wed 8/10

5:24 p.m.-3:47 p.m.

2 stops25h 23m

C$ 802

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 15/12

5:59 p.m.-3:35 p.m.

2 stops18h 36m

Toronto Pearson Intl

Wed 31/12

4:45 p.m.-10:17 p.m.

1 stop8h 32m

C$ 805

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 16/12

7:50 a.m.-3:35 p.m.

2 stops28h 45m

Toronto Pearson Intl

Wed 31/12

4:45 p.m.-10:17 p.m.

1 stop8h 32m

C$ 808

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sat 4/10

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

1 stop28h 55m

Toronto Pearson Intl

Mon 6/10

4:45 p.m.-12:01 p.m.

2 stops22h 16m

C$ 825

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sat 4/10

12:25 p.m.-10:50 p.m.

1 stop7h 25m

Toronto Pearson Intl

Mon 6/10

6:30 a.m.-12:01 p.m.

2 stops32h 31m

C$ 829

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Wed 26/11

4:23 p.m.-3:04 p.m.

2 stops43h 41m

Montreal Pierre Elliott Trudeau Intl

Fri 5/12

3:52 p.m.-12:27 p.m.

2 stops23h 35m

C$ 1,127

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 29 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, January is the cheapest month in which you can book a flight from Santa Rosa to Region of Ontario (average of C$ 168). Flying from Santa Rosa to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 16h 42m. Alaska Airlines provides one of the quickest options available for as low as C$ 802. 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, January is the cheapest month in which you can book a flight from Santa Rosa to Region of Ontario (average of C$ 168). Flying from Santa Rosa to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 Santa Rosa to Ontario?

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Why should you use Cheapflights to find cheap flight tickets from Santa Rosa to Ontario?

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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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