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$135+ 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 7/30. Fares are subject to change and may not be available on all flights or dates of travel.
STS — YYZ
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$397
(Kiwi.com)

One-way from

$135
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$426
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. 11% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Thu 7/107:00 amSTS - YYZ
1 stop11h 57mMultiple Airlines
Thu 7/1710:25 pmYYZ - STS
2 stops28h 19mMultiple Airlines
Deal found 6/11$397
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Thu 7/2412:20 pmSTS - YYZ
1 stop7h 35mAmerican Airlines
Wed 7/306:50 amYYZ - STS
1 stop7h 50mAmerican Airlines
Deal found 6/10$481
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Tue 7/224:16 pmSTS - YUL
2 stops27h 28mAmerican Airlines
Tue 7/295:29 pmYUL - STS
2 stops22h 02mAmerican Airlines
Deal found 6/10$663
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 6/298:01 pmSTS - YYZ
1 stop15h 59mAlaska Airlines
Tue 7/154:45 pmYYZ - STS
1 stop29h 22mAlaska Airlines
Deal found 6/11$806

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 June 12, 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

Thu 7/10

7:00 am-9:57 pm

1 stop11h 57m

Toronto Pearson Intl

Thu 7/17

10:25 pm-11:44 pm

2 stops28h 19m

$397

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Thu 7/24

12:20 pm-10:55 pm

1 stop7h 35m

Toronto Pearson Intl

Wed 7/30

6:50 am-11:40 am

1 stop7h 50m

$481

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Tue 7/22

4:16 pm-10:44 pm

2 stops27h 28m

Montreal Pierre Elliott Trudeau Intl

Tue 7/29

5:29 pm-12:31 pm

2 stops22h 02m

$663

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Sun 6/29

8:01 pm-3:00 pm

1 stop15h 59m

Toronto Pearson Intl

Tue 7/15

4:45 pm-7:07 pm

1 stop29h 22m

$806

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 7/30

3:05 pm-5:51 am

3 stops35h 46m

$135

Santa RosaToronto

STS - YKF

STSYKF

Santa Rosa Sonoma County

Wed 7/30

7:00 am-12:46 am

2 stops38h 46m

$171

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Wed 9/24

7:03 am-12:41 am

2 stops14h 38m

$189

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Wed 10/8

2:30 pm-3:00 pm

1 stop21h 30m

$206

Santa RosaToronto

STS - YYZ

STSYYZ

Santa Rosa Sonoma County

Mon 7/7

4:16 pm-4:29 pm

2 stops21h 13m

$208

Santa RosaMontreal

STS - YUL

STSYUL

Santa Rosa Sonoma County

Tue 7/22

4:16 pm-12:20 pm

2 stops17h 04m

$418

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

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 $353). 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 June 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you 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?

    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 $353). 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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