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Cheap flights from Santa Rosa to Ontario from C$ 341

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 26/9. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
26 Aug — 2 Sep1
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 27 July 2026.

Tue 10/111:13 p.m.
STS
-
YYZ
1 stop29h 37m
Multiple Airlines
Wed 18/111:30 p.m.
YYZ
-
STS
2 stops29h 58m
Multiple Airlines
Deal found 26/7C$ 679
Tue 10/111:13 p.m.
STS
-
YYZ
2 stops23h 52m
Alaska Airlines
Wed 18/115:15 p.m.
YYZ
-
STS
2 stops26h 48m
Alaska Airlines
Deal found 26/7C$ 744
Mon 16/114:55 p.m.
STS
-
YUL
2 stops27h 56m
Delta
Wed 25/1112:45 p.m.
YUL
-
STS
2 stops30h 23m
Delta
Deal found 24/7C$ 759
Thu 24/91:40 p.m.
STS
-
YYZ
2 stops17h 05m
Multiple Airlines
Sun 27/98:35 p.m.
YYZ
-
STS
1 stop23h 04m
Multiple Airlines
Deal found 26/7C$ 826
Thu 22/104:50 p.m.
STS
-
YUL
2 stops28h 09m
Delta
Wed 28/107:00 a.m.
YUL
-
STS
2 stops30h 41m
Delta
Deal found 26/7C$ 827
Tue 10/1112:44 p.m.
STS
-
YYZ
1 stop21h 22m
American Airlines
Wed 18/116:10 a.m.
YYZ
-
STS
1 stop9h 04m
American Airlines
Deal found 26/7C$ 831
Thu 27/84:08 p.m.
STS
-
YYZ
2 stops15h 09m
American Airlines
Wed 9/98:00 a.m.
YYZ
-
STS
2 stops10h 50m
American Airlines
Deal found 24/7C$ 845
Mon 19/104:50 p.m.
STS
-
YUL
2 stops28h 09m
Delta
Tue 27/106:00 a.m.
YUL
-
STS
2 stops31h 41m
Delta
Deal found 26/7C$ 851
Wed 25/114:29 p.m.
STS
-
YYZ
2 stops19h 05m
American Airlines
Tue 1/126:10 a.m.
YYZ
-
STS
2 stops12h 45m
American Airlines
Deal found 26/7C$ 852
Wed 25/1112:44 p.m.
STS
-
YYZ
2 stops19h 26m
American Airlines
Thu 26/112:01 p.m.
YYZ
-
STS
1 stop25h 24m
American Airlines
Deal found 26/7C$ 858
Sun 25/1011:21 a.m.
STS
-
YUL
2 stops33h 38m
Delta
Wed 28/107:00 a.m.
YUL
-
STS
2 stops30h 41m
Delta
Deal found 26/7C$ 865
Thu 22/104:50 p.m.
STS
-
YUL
2 stops28h 09m
Delta
Fri 30/107:00 a.m.
YUL
-
STS
2 stops30h 41m
Delta
Deal found 26/7C$ 872

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 27 July 2026.

Round-trip from

C$ 679

One-way from

C$ 341

Popular in

December

Cheapest in

January

Average price

C$ 823
10/11-18/11
  • 10/11-18/11
  • 3 total stops
  • 59h 35m total
  • Santa Rosa to Ontario
Search Deals
26/9
  • 26/9
  • 2 total stops
  • 13h 01m total
  • Santa Rosa to Ontario
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 27 July 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 RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Tue 17/11

4:55 p.m.-3:59 p.m.

2 stops20h 04m

Montreal Pierre Elliott Trudeau Intl

Wed 25/11

6:15 p.m.-10:39 a.m.

2 stops19h 24m

C$ 759

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Sat 21/11

11:25 a.m.-11:51 p.m.

2 stops33h 26m

Montreal Pierre Elliott Trudeau Intl

Wed 25/11

7:00 a.m.-10:39 a.m.

2 stops30h 39m

C$ 876

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Sat 24/10

11:21 a.m.-11:22 p.m.

2 stops9h 01m

Montreal Pierre Elliott Trudeau Intl

Tue 27/10

7:00 a.m.-4:05 p.m.

2 stops36h 05m

C$ 879

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Wed 25/11

4:55 p.m.-11:51 p.m.

2 stops27h 56m

Montreal Pierre Elliott Trudeau Intl

Tue 1/12

7:00 a.m.-10:39 a.m.

2 stops30h 39m

C$ 881

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 28/9

12:39 p.m.-1:59 p.m.

1 stop22h 20m

Toronto Pearson Intl

Sat 3/10

3:45 p.m.-12:09 p.m.

2 stops23h 24m

C$ 892

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 19/8

4:08 p.m.-5:29 p.m.

2 stops22h 21m

Toronto Pearson Intl

Mon 24/8

6:28 p.m.-12:09 p.m.

1 stop20h 41m

C$ 893
Quickest round-trip

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Tue 24/11

11:29 a.m.-11:11 p.m.

2 stops8h 42m

Toronto Pearson Intl

Thu 26/11

7:45 a.m.-4:06 p.m.

2 stops11h 21m

C$ 896

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sun 22/11

11:29 a.m.-11:11 p.m.

2 stops8h 42m

Toronto Pearson Intl

Wed 2/12

6:30 a.m.-4:06 p.m.

2 stops12h 36m

C$ 896

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Tue 20/10

11:21 a.m.-11:59 p.m.

2 stops33h 38m

Montreal Pierre Elliott Trudeau Intl

Fri 30/10

7:00 a.m.-10:41 a.m.

2 stops30h 41m

C$ 896

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 19/8

12:58 p.m.-10:17 a.m.

2 stops18h 19m

Toronto Pearson Intl

Sun 23/8

7:24 p.m.-12:09 p.m.

2 stops19h 45m

C$ 900

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/7

Showing 1-10 of 45 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 20h 04m. Alaska Airlines provides one of the quickest options available for as low as C$ 759. The distance between Santa Rosa and Region of Ontario is about 4060 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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