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Cheap flights from Santa Rosa to Ontario from C$ 277

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
27 Feb — 6 Mar1
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 28 January 2026.

Tue 17/26:50 p.m.
STS
-
YYZ
2 stops17h 45m
Alaska Airlines
Tue 24/24:45 p.m.
YYZ
-
STS
1 stop20h 47m
Alaska Airlines
Deal found 27/1C$ 656
Tue 17/26:50 p.m.
STS
-
YYZ
2 stops17h 45m
Alaska Airlines
Thu 26/24:45 p.m.
YYZ
-
STS
1 stop10h 05m
Alaska Airlines
Deal found 27/1C$ 663
Tue 17/27:57 p.m.
STS
-
YYZ
1 stop16h 38m
Alaska Airlines
Mon 23/24:45 p.m.
YYZ
-
STS
1 stop20h 47m
Alaska Airlines
Deal found 27/1C$ 670
Tue 17/26:50 p.m.
STS
-
YYZ
2 stops17h 45m
Alaska Airlines
Fri 27/24:45 p.m.
YYZ
-
STS
2 stops20h 26m
Alaska Airlines
Deal found 27/1C$ 671
Tue 17/26:50 p.m.
STS
-
YYZ
2 stops17h 45m
Alaska Airlines
Sat 21/24:45 p.m.
YYZ
-
STS
1 stop20h 47m
Alaska Airlines
Deal found 27/1C$ 690
Fri 20/27:57 p.m.
STS
-
YYZ
1 stop16h 38m
Alaska Airlines
Fri 27/24:45 p.m.
YYZ
-
STS
2 stops20h 26m
Alaska Airlines
Deal found 27/1C$ 692
Fri 20/27:57 p.m.
STS
-
YYZ
1 stop16h 38m
Alaska Airlines
Mon 23/24:45 p.m.
YYZ
-
STS
2 stops19h 29m
Alaska Airlines
Deal found 27/1C$ 700
Mon 16/37:57 p.m.
STS
-
YYZ
1 stop16h 38m
Alaska Airlines
Fri 20/34:45 p.m.
YYZ
-
STS
1 stop28h 16m
Alaska Airlines
Deal found 25/1C$ 704
Fri 27/36:53 p.m.
STS
-
YYZ
1 stop17h 42m
Alaska Airlines
Fri 3/44:55 p.m.
YYZ
-
STS
1 stop28h 06m
Alaska Airlines
Deal found 27/1C$ 711
Wed 18/27:57 p.m.
STS
-
YYZ
1 stop16h 38m
Alaska Airlines
Mon 23/24:45 p.m.
YYZ
-
STS
1 stop20h 47m
Alaska Airlines
Deal found 27/1C$ 716
Wed 17/61:05 p.m.
STS
-
YUL
2 stops24h 52m
American Airlines
Tue 23/63:45 p.m.
YUL
-
STS
1 stop23h 40m
American Airlines
Deal found 26/1C$ 1,119
Fri 27/34:23 p.m.
STS
-
YUL
2 stops19h 57m
American Airlines
Sun 5/43:57 p.m.
YUL
-
STS
2 stops23h 29m
American Airlines
Deal found 27/1C$ 1,141

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 28 January 2026.

Round-trip from

C$ 656

One-way from

C$ 277

Popular in

December

Cheapest in

February

Average price

C$ 536
Alaska Airlines
  • Alaska Airlines
  • 17/2-24/2
  • 3 total stops
  • 38h 32m total
  • Santa Rosa to Ontario
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 6/5
  • 1 total stop
  • 16h 59m total
  • Santa Rosa to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 28 January 2026.
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

Tue 17/2

6:50 p.m.-3:35 p.m.

2 stops17h 45m

Toronto Pearson Intl

Mon 23/2

4:45 p.m.-10:32 a.m.

1 stop20h 47m

C$ 656

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 20/2

7:57 p.m.-3:35 p.m.

1 stop16h 38m

Toronto Pearson Intl

Tue 24/2

4:45 p.m.-10:32 a.m.

1 stop20h 47m

C$ 670

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 17/2

6:50 p.m.-3:35 p.m.

2 stops17h 45m

Toronto Pearson Intl

Fri 27/2

4:45 p.m.-10:11 a.m.

2 stops20h 26m

C$ 671

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 27/3

6:53 p.m.-3:35 p.m.

1 stop17h 42m

Toronto Pearson Intl

Sun 5/4

4:55 p.m.-6:01 p.m.

1 stop28h 06m

C$ 677

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 17/2

6:50 p.m.-3:35 p.m.

2 stops17h 45m

Toronto Pearson Intl

Tue 24/2

4:45 p.m.-9:14 a.m.

2 stops19h 29m

C$ 679

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 17/2

6:50 p.m.-3:35 p.m.

2 stops17h 45m

Toronto Pearson Intl

Wed 25/2

4:45 p.m.-9:14 a.m.

2 stops19h 29m

C$ 679

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 17/2

6:50 p.m.-3:35 p.m.

2 stops17h 45m

Toronto Pearson Intl

Sat 21/2

4:45 p.m.-10:32 a.m.

1 stop20h 47m

C$ 690

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 20/2

7:57 p.m.-3:35 p.m.

1 stop16h 38m

Toronto Pearson Intl

Mon 23/2

4:45 p.m.-9:14 a.m.

2 stops19h 29m

C$ 700

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 20/2

7:57 p.m.-3:35 p.m.

1 stop16h 38m

Toronto Pearson Intl

Wed 25/2

4:45 p.m.-9:14 a.m.

2 stops19h 29m

C$ 700

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sat 28/3

6:53 p.m.-3:45 p.m.

1 stop17h 52m

Toronto Pearson Intl

Sat 4/4

4:55 p.m.-6:01 p.m.

1 stop28h 06m

C$ 700

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 38 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$ 174). Flying from Santa Rosa to Region of Ontario in December is currently the most expensive (average of C$ 369). 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 17h 45m. Alaska Airlines provides one of the quickest options available for as low as C$ 656. 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$ 174). Flying from Santa Rosa to Region of Ontario in December is currently the most expensive (average of C$ 369). 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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Alternative routes for Santa Rosa to Ontario

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Fly with Cheapflights

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How does Cheapflights help users find flights from Santa Rosa to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Santa Rosa to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to Ontario from Santa Rosa by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Santa Rosa to Ontario with no change fees?

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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