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$234+ Cheap flights from Santa Rosa (STS) to Ontario

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
may. 4 — may. 111
dom. 5/4
dom. 5/11
1 adult, Economy
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Cheap 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 abril 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$422
(Kiwi.com)

One-way from

$234
(American Airlines)

Popular in

December

Cheapest in

February

Average price

$393
Provider with most accurate pricing for San Francisco-Toronto (YTO) flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Toronto (YTO) flights.
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From Santa Rosa Sonoma County to Ontario
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One-way flight from Santa Rosa Sonoma County to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Santa Rosa to Ontario

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 abril 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/137:23 pmSTS - YYZ
1 stop23h 30mMultiple Airlines
vie. 6/2011:00 amYYZ - STS
2 stops15h 44mMultiple Airlines
Deal found 4/29$422
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/278:01 pmSTS - YYZ
1 stop15h 59mAlaska Airlines
vie. 6/64:45 pmYYZ - STS
2 stops21h 21mAlaska Airlines
Deal found 4/29$449
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/44:16 pmSTS - YYZ
2 stops19h 16mAmerican Airlines
mar. 8/55:55 pmYYZ - STS
2 stops20h 42mAmerican Airlines
Deal found 4/29$515
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/212:48 pmSTS - YUL
2 stops18h 21mAmerican Airlines
vie. 9/125:29 pmYUL - STS
2 stops21h 55mAmerican Airlines
Deal found 4/29$753

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 2,558,603 searches. Data last updated abril 29, 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

vie. 6/13

7:23 pm-9:53 pm

1 stop23h 30m

Toronto Pearson Intl

vie. 6/20

11:00 am-11:44 pm

2 stops15h 44m

$422

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

mar. 5/27

8:01 pm-3:00 pm

1 stop15h 59m

Toronto Pearson Intl

vie. 6/6

4:45 pm-11:06 am

2 stops21h 21m

$449

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

lun. 8/4

4:16 pm-2:32 pm

2 stops19h 16m

Toronto Pearson Intl

mar. 8/5

5:55 pm-11:37 am

2 stops20h 42m

$515

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

mar. 9/2

12:48 pm-10:09 am

2 stops18h 21m

Montreal Pierre Elliott Trudeau Intl

vie. 9/12

5:29 pm-12:24 pm

2 stops21h 55m

$753

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

jue. 8/21

12:17 pm-10:50 pm

1 stop7h 33m

$234

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

sáb. 6/14

8:01 pm-3:00 pm

1 stop15h 59m

$254

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

mar. 5/6

12:37 pm-4:39 pm

2 stops25h 02m

$380

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

mar. 5/6

12:24 pm-1:44 pm

2 stops22h 20m

$527

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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, January is the cheapest month in which you can book a flight from Santa Rosa to Region of Ontario (average of $243). Flying from Santa Rosa to Region of Ontario in July is currently the most expensive (average of $359). 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated abril 29, 2025.
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Entertainment

7.1

Comfort

7.9

Food

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    Santa Rosa Sonoma County (STS), located 7.2 mi from the city center, is the airport you fly out of when you book flights from Santa Rosa to Ontario.

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

    While some choose either Santa Rosa Sonoma County - Montreal Pierre Elliott Trudeau Intl or Santa Rosa Sonoma County - Toronto Region of Waterloo Intl, Santa Rosa Sonoma County - Toronto Pearson Intl is the most popular route from Santa Rosa to Region of Ontario.

  • 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, January is the cheapest month in which you can book a flight from Santa Rosa to Region of Ontario (average of $243). Flying from Santa Rosa to Region of Ontario in July is currently the most expensive (average of $359). 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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