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Santa Rosa

$223+ Cheap flights from Ontario to Santa Rosa (STS)

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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Ontario to Santa Rosa

Cheapest flights from Ontario to Santa Rosa
Explore the most affordable flight options available from Ontario to Santa Rosa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sun 12/148:00 pmYYZ - STS
2 stops30h 52mMultiple Airlines
Sun 12/217:00 amSTS - YYZ
1 stop20h 47mMultiple Airlines
Deal found 10/30$463
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Fri 11/144:45 pmYYZ - STS
2 stops18h 59mAlaska Airlines
Sun 11/238:15 pmSTS - YYZ
1 stop16h 20mAlaska Airlines
Deal found 10/29$583
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/84:45 pmYYZ - STS
1 stop8h 20mAlaska Airlines
Wed 11/194:51 pmSTS - YYZ
2 stops19h 44mAlaska Airlines
Deal found 10/29$620
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/81:11 pmYYZ - STS
2 stops25h 55mAmerican Airlines
Wed 11/191:18 pmSTS - YYZ
2 stops18h 45mAmerican Airlines
Deal found 10/29$622
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 11/106:10 amYYZ - STS
1 stop8h 57mAmerican Airlines
Fri 11/214:23 pmSTS - YYZ
2 stops14h 27mAmerican Airlines
Deal found 10/29$702
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/84:45 pmYYZ - STS
1 stop8h 20mAlaska Airlines
Thu 11/202:22 pmSTS - YYZ
1 stop22h 13mAlaska Airlines
Deal found 10/29$705
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 11/25:00 amYYZ - STS
2 stops12h 53mAmerican Airlines
Wed 11/122:10 pmSTS - YYZ
2 stops22h 54mAmerican Airlines
Deal found 10/29$762
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/16:49 amYYZ - STS
2 stops11h 58mAmerican Airlines
Fri 11/144:23 pmSTS - YYZ
2 stops15h 40mAmerican Airlines
Deal found 10/29$769
This American Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/86:10 amYYZ - STS
1 stop8h 57mAmerican Airlines
Fri 11/214:23 pmSTS - YYZ
2 stops15h 40mAmerican Airlines
Deal found 10/29$784

Cheap flight deals from Ontario to Santa Rosa

Keep the following information in mind while searching for Ontario to Santa Rosa flight deals. Data was last updated October 30, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$460
(Alaska Airlines)

One-way from

$223
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$397
Provider with most accurate pricing for Toronto (YTO)-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for Toronto (YTO)-San Francisco flights.
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From Ontario to Santa Rosa Sonoma County
Search Deals
One-way flight from Ontario to Santa Rosa Sonoma County
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Santa Rosa 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 October 30, 2025.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.

Fly from

Ontario

Fly to

Santa Rosa

Route

Depart

Return

Price

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sun 12/14

10:00 am-10:19 am

1 stop27h 19m

Santa Rosa Sonoma County

Sun 12/21

7:00 am-6:47 am

1 stop20h 47m

$465

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 4/6

6:20 pm-3:47 pm

2 stops24h 27m

Santa Rosa Sonoma County

Wed 4/8

12:46 pm-10:40 am

2 stops18h 54m

$503

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 11/14

4:45 pm-8:44 am

2 stops18h 59m

Santa Rosa Sonoma County

Sun 11/23

8:15 pm-3:35 pm

1 stop16h 20m

$583

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sun 11/9

4:45 pm-10:05 pm

1 stop8h 20m

Santa Rosa Sonoma County

Wed 11/19

12:00 pm-3:35 pm

2 stops24h 35m

$620

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 11/10

4:45 pm-10:05 pm

1 stop8h 20m

Santa Rosa Sonoma County

Wed 11/19

4:51 pm-3:35 pm

2 stops19h 44m

$620

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sun 11/9

4:44 pm-12:07 pm

2 stops22h 23m

Santa Rosa Sonoma County

Wed 11/19

1:18 pm-11:54 am

2 stops19h 36m

$622

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 11/10

6:20 pm-12:07 pm

2 stops20h 47m

Santa Rosa Sonoma County

Wed 11/19

1:18 pm-3:57 pm

2 stops23h 39m

$622

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 4/7

3:50 pm-12:17 pm

2 stops23h 27m

Santa Rosa Sonoma County

Wed 4/8

4:17 pm-11:15 am

2 stops15h 58m

$693

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 4/6

4:45 pm-9:51 pm

1 stop8h 06m

Santa Rosa Sonoma County

Wed 4/8

1:22 pm-3:35 pm

2 stops23h 13m

$695

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 11/10

6:10 am-12:07 pm

1 stop8h 57m

Santa Rosa Sonoma County

Thu 11/20

4:23 pm-11:03 am

2 stops15h 40m

$702

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 28 results
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Best time to book a flight from Ontario to Santa Rosa

Have a flexible travel schedule? Discover the best time to fly to Santa Rosa from Ontario 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 Ontario to Santa Rosa

What is the cheapest month to book a flight from Region of Ontario to Santa Rosa?

Currently, April is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of $144). Flying from Region of Ontario to Santa Rosa in January is currently the most expensive (average of $254). 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Santa Rosa. 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 into for flights to Santa Rosa from Ontario?

    Located just 7.2 mi from the city center, Santa Rosa Sonoma County (STS) is the airport most travelers will use when flying to Santa Rosa from Ontario.

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

    For as low as $583, American Airlines can have you in Santa Rosa from Region of Ontario in 18h 59m. Airlines will cover a distance of 2250 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    When deciding which route to take from Region of Ontario to Santa Rosa consider Montreal Pierre Elliott Trudeau Intl - Santa Rosa Sonoma County, Hamilton - Santa Rosa Sonoma County or Toronto Pearson Intl - Santa Rosa Sonoma County as they are the most popular.

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

    Yes. In addition to deals on Ontario to Santa Rosa flights, Cheapflights offers vacation packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Santa Rosa.

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

    Yes. Cheapflights offers flight deals from Ontario to Santa Rosa 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 Region of Ontario to Santa Rosa?

    Currently, April is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of $144). Flying from Region of Ontario to Santa Rosa in January is currently the most expensive (average of $254). 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

Traveling to a place near Santa Rosa?

Book flights to Santa Rosa if you plan to visit one of these locations
Fort Bragg
Ukiah

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