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Cheap flights from Santa Rosa to Ontario from C$ 335

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 13/6. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
29 May — 5 Jun1
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 29 April 2026.

Sat 13/61:06 p.m.
STS
-
YYZ
2 stops29h 09m
Multiple Airlines
Sat 20/69:55 a.m.
YYZ
-
STS
1 stop10h 21m
Multiple Airlines
Deal found 29/4C$ 732
Mon 25/512:05 p.m.
STS
-
YYZ
1 stop28h 55m
Multiple Airlines
Mon 15/610:30 p.m.
YYZ
-
STS
2 stops21h 46m
Multiple Airlines
Deal found 26/4C$ 805
Fri 22/57:50 a.m.
STS
-
YYZ
2 stops25h 05m
Multiple Airlines
Tue 26/59:40 a.m.
YYZ
-
STS
1 stop13h 19m
Multiple Airlines
Deal found 25/4C$ 810
Mon 8/612:05 p.m.
STS
-
YYZ
2 stops34h 00m
Multiple Airlines
Mon 15/68:30 p.m.
YYZ
-
STS
1 stop23h 46m
Multiple Airlines
Deal found 24/4C$ 836
Tue 26/58:26 p.m.
STS
-
YYZ
2 stops31h 29m
Multiple Airlines
Tue 16/69:55 a.m.
YYZ
-
STS
1 stop10h 21m
Multiple Airlines
Deal found 26/4C$ 863
Tue 2/67:59 a.m.
STS
-
YYZ
1 stop9h 36m
Multiple Airlines
Wed 3/69:40 a.m.
YYZ
-
STS
1 stop13h 19m
Multiple Airlines
Deal found 27/4C$ 869
Thu 11/65:35 p.m.
STS
-
YYZ
1 stop24h 00m
Multiple Airlines
Thu 18/611:10 p.m.
YYZ
-
STS
2 stops45h 06m
Multiple Airlines
Deal found 27/4C$ 945
Sat 13/64:20 p.m.
STS
-
YYZ
2 stops14h 58m
American Airlines
Sat 20/66:15 a.m.
YYZ
-
STS
2 stops12h 35m
American Airlines
Deal found 29/4C$ 949
Fri 5/66:59 p.m.
STS
-
YYZ
2 stops17h 46m
Alaska Airlines
Thu 11/64:55 p.m.
YYZ
-
STS
1 stop8h 56m
Alaska Airlines
Deal found 25/4C$ 970
Tue 2/61:03 p.m.
STS
-
YYZ
2 stops22h 27m
American Airlines
Mon 8/66:24 p.m.
YYZ
-
STS
2 stops20h 41m
American Airlines
Deal found 27/4C$ 975
Tue 14/74:12 p.m.
STS
-
YUL
2 stops16h 31m
American Airlines
Tue 21/75:30 p.m.
YUL
-
STS
2 stops22h 00m
American Airlines
Deal found 28/4C$ 996
Fri 29/512:43 p.m.
STS
-
YUL
1 stop23h 01m
American Airlines
Mon 8/65:33 p.m.
YUL
-
STS
2 stops21h 32m
American Airlines
Deal found 27/4C$ 1,157

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 29 April 2026.

Round-trip from

C$ 732

One-way from

C$ 335

Popular in

December

Cheapest in

January

Average price

C$ 639
13/6-20/6
  • 13/6-20/6
  • 3 total stops
  • 39h 30m total
  • Santa Rosa to Ontario
Search Deals
13/6
  • 13/6
  • 2 total stops
  • 14h 49m total
  • Santa Rosa to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 29 April 2026.
Use the filters below to find and compare flights from Santa Rosa to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 8/6

12:05 p.m.-1:05 a.m.

2 stops34h 00m

Toronto Pearson Intl

Mon 15/6

8:30 p.m.-5:16 p.m.

1 stop23h 46m

C$ 836

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Fri 5/6

8:26 p.m.-3:45 p.m.

1 stop16h 19m

Toronto Pearson Intl

Fri 12/6

4:55 p.m.-11:58 a.m.

1 stop22h 03m

C$ 1,089

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 12/5

8:20 a.m.-3:45 p.m.

2 stops28h 25m

Toronto Pearson Intl

Thu 14/5

4:55 p.m.-8:54 a.m.

2 stops18h 59m

C$ 1,095

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 8/6

7:59 a.m.-3:45 p.m.

2 stops28h 46m

Toronto Pearson Intl

Mon 15/6

4:55 p.m.-12:26 p.m.

2 stops22h 31m

C$ 1,101

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 26/8

12:58 p.m.-10:59 a.m.

2 stops19h 01m

Toronto Pearson Intl

Wed 2/9

7:15 p.m.-3:47 p.m.

2 stops23h 32m

C$ 1,121

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 19/8

4:08 p.m.-10:59 a.m.

2 stops15h 51m

Toronto Pearson Intl

Wed 26/8

6:46 a.m.-3:37 p.m.

2 stops11h 51m

C$ 1,121
Quickest round-trip

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Thu 4/6

8:26 p.m.-3:45 p.m.

1 stop16h 19m

Toronto Pearson Intl

Thu 11/6

4:55 p.m.-10:51 p.m.

1 stop8h 56m

C$ 1,157

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Sun 31/5

12:43 p.m.-4:53 p.m.

2 stops25h 10m

Montreal Pierre Elliott Trudeau Intl

Mon 8/6

5:33 p.m.-12:05 p.m.

2 stops21h 32m

C$ 1,164

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Fri 29/5

12:43 p.m.-11:44 a.m.

2 stops20h 01m

Montreal Pierre Elliott Trudeau Intl

Tue 9/6

5:33 p.m.-12:39 p.m.

2 stops22h 06m

C$ 1,164

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Sat 30/5

1:03 p.m.-3:28 p.m.

2 stops23h 25m

Montreal Pierre Elliott Trudeau Intl

Mon 8/6

5:33 p.m.-12:05 p.m.

2 stops21h 32m

C$ 1,164

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/4

Showing 1-10 of 39 resultsSorted by cheapest first
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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
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 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 19m. Alaska Airlines provides one of the quickest options available for as low as C$ 1,089. 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 Pearson Intl. You may also consider Santa Rosa Sonoma County - Montreal Pierre Elliott Trudeau Intl or Santa Rosa Sonoma County - Toronto Region of Waterloo 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.

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?

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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.

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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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