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Cheap flights from Santa Rosa to Ontario from C$ 532

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/1. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap 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 12 December 2025.

Thu 25/126:00 a.m.STS - YYZ
1 stop30h 35mAlaska Airlines
Mon 12/14:45 p.m.YYZ - STS
2 stops22h 37mAlaska Airlines
Deal found 9/12C$ 952
Thu 25/126:00 a.m.STS - YYZ
1 stop30h 35mAlaska Airlines
Thu 8/14:45 p.m.YYZ - STS
1 stop10h 14mAlaska Airlines
Deal found 9/12C$ 965
Thu 25/1212:03 p.m.STS - YYZ
2 stops24h 32mAlaska Airlines
Fri 9/14:45 p.m.YYZ - STS
1 stop10h 14mAlaska Airlines
Deal found 9/12C$ 979
Thu 25/126:00 a.m.STS - YYZ
1 stop30h 35mAlaska Airlines
Sun 11/14:45 p.m.YYZ - STS
1 stop10h 14mAlaska Airlines
Deal found 10/12C$ 1,025
Thu 25/126:00 a.m.STS - YYZ
1 stop30h 35mAlaska Airlines
Sat 10/14:45 p.m.YYZ - STS
1 stop20h 50mAlaska Airlines
Deal found 11/12C$ 1,045
Thu 25/126:00 a.m.STS - YYZ
1 stop30h 35mAlaska Airlines
Wed 7/14:45 p.m.YYZ - STS
2 stops30h 56mAlaska Airlines
Deal found 10/12C$ 1,058
Wed 17/1212:57 p.m.STS - YUL
2 stops20h 23mAmerican Airlines
Thu 25/127:08 a.m.YUL - STS
2 stops32h 21mAmerican Airlines
Deal found 10/12C$ 1,491
Wed 17/1212:57 p.m.STS - YUL
2 stops20h 23mAmerican Airlines
Fri 26/123:59 p.m.YUL - STS
2 stops23h 30mAmerican Airlines
Deal found 10/12C$ 1,640
Wed 17/1212:57 p.m.STS - YUL
2 stops23h 09mAmerican Airlines
Sat 27/127:30 a.m.YUL - STS
2 stops31h 59mAmerican Airlines
Deal found 10/12C$ 1,787
Thu 18/124:21 p.m.STS - YUL
2 stops19h 45mAmerican Airlines
Fri 26/1212:59 p.m.YUL - STS
2 stops26h 30mAmerican Airlines
Deal found 10/12C$ 1,936
Fri 19/1212:59 p.m.STS - YUL
2 stops23h 12mAmerican Airlines
Thu 25/127:08 a.m.YUL - STS
2 stops32h 21mAmerican Airlines
Deal found 10/12C$ 1,980
Thu 18/124:21 p.m.STS - YUL
2 stops19h 45mAmerican Airlines
Sat 27/127:30 a.m.YUL - STS
2 stops31h 59mAmerican Airlines
Deal found 10/12C$ 2,084

Find 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 12 December 2025.

Round-trip from

C$ 532

Popular in

December

Cheapest in

February

Average price

C$ 888
Alaska Airlines
  • Alaska Airlines
  • 23/1-26/1
  • 3 total stops
  • 28h 19m total
  • Santa Rosa to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 12 December 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

Fri 23/1

6:30 p.m.-3:35 p.m.

2 stops18h 05m

Toronto Pearson Intl

Mon 26/1

4:45 p.m.-11:59 p.m.

1 stop10h 14m

C$ 532

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 23/1

9:33 p.m.-3:35 p.m.

1 stop15h 02m

Toronto Pearson Intl

Sun 25/1

4:45 p.m.-11:59 p.m.

1 stop10h 14m

C$ 546

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Thu 8/1

6:30 p.m.-3:35 p.m.

2 stops18h 05m

Toronto Pearson Intl

Mon 12/1

4:45 p.m.-12:22 p.m.

2 stops22h 37m

C$ 552

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Thu 22/1

9:33 p.m.-3:35 p.m.

1 stop15h 02m

Toronto Pearson Intl

Mon 26/1

4:45 p.m.-11:59 p.m.

1 stop10h 14m

C$ 559

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Thu 22/1

6:30 p.m.-3:35 p.m.

2 stops18h 05m

Toronto Pearson Intl

Sun 25/1

4:45 p.m.-9:56 a.m.

2 stops20h 11m

C$ 574

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 16/1

9:33 p.m.-3:35 p.m.

1 stop15h 02m

Toronto Pearson Intl

Sun 18/1

4:45 p.m.-11:59 p.m.

1 stop10h 14m

C$ 575

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 21/1

11:15 a.m.-3:35 p.m.

1 stop25h 20m

Toronto Pearson Intl

Mon 26/1

4:45 p.m.-11:59 p.m.

1 stop10h 14m

C$ 579

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Sun 25/1

4:23 p.m.-3:08 p.m.

2 stops19h 45m

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

3:50 p.m.-12:25 p.m.

2 stops23h 35m

C$ 1,112

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Fri 20/3

4:23 p.m.-12:19 p.m.

2 stops16h 56m

Montreal Pierre Elliott Trudeau Intl

Mon 23/3

4:00 p.m.-12:26 p.m.

2 stops23h 26m

C$ 1,222

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Wed 18/3

4:23 p.m.-12:24 p.m.

2 stops17h 01m

Montreal Pierre Elliott Trudeau Intl

Mon 23/3

7:12 a.m.-3:53 p.m.

2 stops11h 41m

C$ 1,222

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 27 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$ 175). Flying from Santa Rosa to Region of Ontario in December is currently the most expensive (average of C$ 299). 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 18h 05m. Alaska Airlines provides one of the quickest options available for as low as C$ 532. 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 - Montreal Pierre Elliott Trudeau Intl. You may also consider Santa Rosa Sonoma County - Toronto Region of Waterloo Intl or Santa Rosa Sonoma County - Sudbury.

  • 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$ 175). Flying from Santa Rosa to Region of Ontario in December is currently the most expensive (average of C$ 299). 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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