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 13h 10m. Delta provides one of the quickest options available for as low as C$ 943. 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.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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.

What is the cheapest time of day to fly from STS to ON?

When flying from Santa Rosa to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

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.

C$ 378+ Cheap Flights from Santa Rosa to Ontario

Cheap flight deals from Santa Rosa to Ontario

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 10 September 2026.

Sun 25/109:37 a.m. -

2 stops12h 18m

Sat 31/107:00 a.m. -

1 stop12h 12m

Deal found 9/9C$ 703

Thu 1/101:40 p.m. -

2 stops13h 05m

Mon 5/108:35 p.m. -

1 stop22h 37m

Deal found 6/9C$ 739

Sat 24/101:10 p.m. -

2 stops19h 34m

Sat 31/105:34 p.m. -

2 stops23h 14m

Deal found 9/9C$ 791

Fri 9/102:00 p.m. -

1 stop13h 39m

Sun 11/108:35 p.m. -

1 stop22h 37m

Deal found 7/9C$ 918

Sat 17/104:49 p.m. -

2 stops14h 34m

Tue 20/106:00 a.m. -

2 stops13h 05m

Deal found 5/9C$ 925

Sun 25/108:07 a.m. -

2 stops28h 58m

Sat 31/105:15 p.m. -

2 stops19h 57m

Deal found 9/9C$ 936

Tue 6/1011:21 a.m. -

2 stops9h 01m

Tue 13/1012:50 p.m. -

2 stops24h 51m

Deal found 9/9C$ 939

Thu 22/104:23 p.m. -

2 stops16h 21m

Thu 29/105:34 p.m. -

2 stops22h 06m

Deal found 7/9C$ 940

Tue 6/1011:21 a.m. -

2 stops9h 01m

Sat 17/107:00 a.m. -

2 stops30h 41m

Deal found 9/9C$ 960

Thu 15/104:49 p.m. -

2 stops14h 34m

Tue 20/106:00 a.m. -

2 stops13h 05m

Deal found 5/9C$ 966

Tue 29/91:40 p.m. -

2 stops14h 15m

Sat 10/101:50 p.m. -

1 stop29h 22m

Deal found 7/9C$ 986

Mon 12/104:49 p.m. -

2 stops28h 05m

Wed 21/106:00 a.m. -

2 stops31h 41m

Deal found 6/9C$ 987

Best flights from Santa Rosa to Ontario
Discover carefully curated flight deals from Santa Rosa to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Fri 9/102:00 p.m. -

1 stop13h 39m

Sun 11/108:35 p.m. -

1 stop22h 37m

Deal found 7/9C$ 918

Sat 13/27:00 a.m. -

2 stops13h 10m

Tue 16/27:00 a.m. -

2 stops17h 48m

Deal found 9/9C$ 943

Thu 29/1012:43 p.m. -

2 stops19h 16m

Mon 2/116:21 p.m. -

2 stops20h 53m

Deal found 10/9C$ 990

Tue 29/912:01 p.m. -

2 stops24h 44m

Sat 10/104:55 p.m. -

2 stops19h 02m

Deal found 7/9C$ 1,066

Thu 15/104:49 p.m. -

2 stops14h 34m

Tue 20/106:00 a.m. -

2 stops13h 05m

Deal found 5/9C$ 966

Tue 29/91:40 p.m. -

2 stops14h 15m

Sat 10/101:50 p.m. -

1 stop29h 22m

Deal found 7/9C$ 986

Fri 12/27:00 a.m. -

2 stops13h 10m

Tue 16/27:00 a.m. -

2 stops17h 48m

Deal found 9/9C$ 973

Sat 31/103:08 p.m. -

2 stops22h 57m

Tue 3/115:15 p.m. -

2 stops18h 57m

Deal found 9/9C$ 1,084

Mon 12/104:35 p.m. -

2 stops23h 49m

Fri 16/108:35 p.m. -

1 stop22h 37m

Deal found 8/9C$ 993

Fri 12/27:00 a.m. -

2 stops13h 10m

Sun 14/27:00 a.m. -

2 stops18h 08m

Deal found 9/9C$ 973

Tue 13/103:08 p.m. -

2 stops21h 37m

Thu 15/104:55 p.m. -

2 stops20h 04m

Deal found 5/9C$ 1,154

Thu 15/104:49 p.m. -

2 stops28h 05m

Wed 21/106:00 a.m. -

2 stops31h 41m

Deal found 6/9C$ 987

Thu 29/106:37 p.m. -

2 stops18h 28m

Mon 2/115:15 p.m. -

2 stops18h 57m

Deal found 10/9C$ 1,169

Tue 6/1011:21 a.m. -

2 stops9h 01m

Tue 13/1012:50 p.m. -

2 stops24h 51m

Deal found 7/9C$ 1,002

Tue 6/1011:21 a.m. -

2 stops9h 01m

Sun 11/1012:50 p.m. -

2 stops24h 51m

Deal found 9/9C$ 1,024

Mon 12/104:49 p.m. -

2 stops28h 05m

Fri 16/107:00 a.m. -

2 stops36h 05m

Deal found 6/9C$ 1,044

Sat 17/104:49 p.m. -

2 stops15h 49m

Tue 20/107:00 a.m. -

2 stops30h 41m

Deal found 6/9C$ 1,055

Thu 1/104:36 p.m. -

2 stops48h 14m

Mon 5/108:40 p.m. -

2 stops41h 37m

Deal found 7/9C$ 1,766

Thu 8/104:49 p.m. -

2 stops16h 08m

Wed 14/1012:50 p.m. -

2 stops30h 15m

Deal found 9/9C$ 1,088

Thu 8/104:49 p.m. -

2 stops16h 08m

Sat 17/107:00 a.m. -

2 stops30h 41m

Deal found 9/9C$ 1,108

Thu 8/104:49 p.m. -

2 stops16h 08m

Thu 15/107:00 a.m. -

2 stops36h 05m

Deal found 7/9C$ 1,117

Mon 12/104:49 p.m. -

2 stops28h 05m

Sun 18/107:00 a.m. -

2 stops30h 41m

Deal found 6/9C$ 1,136

Thu 15/104:49 p.m. -

2 stops14h 34m

Sun 18/106:00 a.m. -

2 stops13h 05m

Deal found 5/9C$ 1,161

Find flight deals from Santa Rosa to Ontario

Round-trip from	C$ 703
One-way from	C$ 378
Popular in	December
Cheapest in	January
Average price	C$ 750

25/10-31/10
3 total stops
24h 30m total
Santa Rosa to Ontario

Search Deals

3/10-31/12
3 total stops
28h 10m total
Santa Rosa to Ontario

Search Deals

High demand for flights, 3% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

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 Santa Rosa Sonoma County - YUL Montreal Pierre Elliott Trudeau Intl

STSYUL

Santa Rosa Sonoma County

Sat 3/10

4:35 p.m.-11:45 p.m.

3 stops28h 10m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 378

Santa RosaMontreal

STS Santa Rosa Sonoma County - YUL Montreal Pierre Elliott Trudeau Intl

STSYUL

Santa Rosa Sonoma County

Sat 3/10

1:08 p.m.-11:44 a.m.

2 stops19h 36m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 394

Santa RosaToronto

STS Santa Rosa Sonoma County - YYZ Toronto Pearson Intl

STSYYZ

Santa Rosa Sonoma County

Mon 7/12

11:27 a.m.-11:26 p.m.

2 stops8h 59m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 460

Santa RosaMontreal

STS Santa Rosa Sonoma County - YUL Montreal Pierre Elliott Trudeau Intl

STSYUL

Santa Rosa Sonoma County

Tue 6/10

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

2 stops9h 01m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 480

Santa RosaMontreal

STS Santa Rosa Sonoma County - YUL Montreal Pierre Elliott Trudeau Intl

STSYUL

Santa Rosa Sonoma County

Thu 24/12

11:28 a.m.-11:37 p.m.

2 stops33h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 564

Santa RosaToronto

STS Santa Rosa Sonoma County - YYZ Toronto Pearson Intl

STSYYZ

Santa Rosa Sonoma County

Fri 2/10

5:34 p.m.-3:45 p.m.

1 stop19h 11m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 607

Santa RosaMontreal

STS Santa Rosa Sonoma County - YUL Montreal Pierre Elliott Trudeau Intl

STSYUL

Santa Rosa Sonoma County

Fri 1/1

11:28 a.m.-11:37 p.m.

2 stops33h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 609

Santa RosaToronto

STS Santa Rosa Sonoma County - YYZ Toronto Pearson Intl

STSYYZ

Santa Rosa Sonoma County

Sat 10/10

11:21 a.m.-11:15 p.m.

2 stops8h 54m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 614

Santa RosaMontreal

STS Santa Rosa Sonoma County - YUL Montreal Pierre Elliott Trudeau Intl

STSYUL

Santa Rosa Sonoma County

Fri 25/12

11:28 a.m.-11:37 p.m.

2 stops9h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 629

Santa RosaToronto

STS Santa Rosa Sonoma County - YYZ Toronto Pearson Intl

STSYYZ

Santa Rosa Sonoma County

Sat 3/10

5:06 p.m.-3:45 p.m.

1 stop19h 39m

Toronto Pearson Intl

Wed 31/12

12:00 a.m.-9:00 p.m.

Nonstop0h 00m

C$ 681

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 46 resultsSorted by cheapest first

...

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.

STS-YUL

STS-YYZ

STS-YKF

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

STS-CAON

STS-YUL

STS-YYZ

STS-YKF

No data available for this route at this time. Please check back soon.

Related info for your journey

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 13h 10m. Delta provides one of the quickest options available for as low as C$ 943. 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

Browse thousands of different options on Cheapflights for your next trip

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Cheap flights from Santa Rosa to Ontario from C$ 378

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Santa Rosa to Ontario

Cheapest flights from Santa Rosa to OntarioExplore 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 10 September 2026.

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 10 September 2026.

Best flights from Santa Rosa to OntarioDiscover carefully curated flight deals from Santa Rosa to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Discover carefully curated flight deals from Santa Rosa to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Last-minute flights from Santa Rosa to OntarioDiscover last-minute flight deals from Santa Rosa to Ontario. Data last updated 10 September 2026 and is based on user searches.

Discover last-minute flight deals from Santa Rosa to Ontario. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Santa Rosa to OntarioSearch for one-way flight options from Santa Rosa to Ontario. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

Search for one-way flight options from Santa Rosa to Ontario. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.

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Best time to book a flight from Santa Rosa to Ontario

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Related info for your journey

What airport do you fly from for flights from Santa Rosa to Ontario?

How long is the flight from Santa Rosa to Region of Ontario?

What are the most popular routes from Santa Rosa to Region of Ontario?

Can I find deals for flights from Santa Rosa to Ontario that include hotel bookings?

How can I find direct flights from Santa Rosa to Ontario?

Can I find deals for business class flights from Santa Rosa to Ontario?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Santa Rosa to Ontario

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Complete your trip

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Santa Rosa and Ontario flights

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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 10 September 2026.

Best flights from Santa Rosa to Ontario
Discover carefully curated flight deals from Santa Rosa to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.

Last-minute flights from Santa Rosa to Ontario
Discover last-minute flight deals from Santa Rosa to Ontario. Data last updated 10 September 2026 and is based on user searches.

One-way flights from Santa Rosa to Ontario
Search for one-way flight options from Santa Rosa to Ontario. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.