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Santa Rosa

$198+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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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 July 31, 2025.

Round-trip from

$380
(Kiwi.com)

One-way from

$198
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$444
From Ontario to Santa Rosa Sonoma County
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One-way flight from Ontario to Santa Rosa Sonoma County
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Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 31, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/31. 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 9/410:40 amYYZ - STS
1 stop16h 19mMultiple Airlines
Mon 9/87:03 amSTS - YYZ
1 stop11h 47mMultiple Airlines
Deal found 7/31$380
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/166:49 amYYZ - STS
2 stops11h 59mAmerican Airlines
Wed 9/2412:25 pmSTS - YYZ
1 stop21h 05mAmerican Airlines
Deal found 7/30$409
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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 9/124:45 pmYYZ - STS
2 stops24h 58mAlaska Airlines
Tue 10/76:51 pmSTS - YYZ
2 stops17h 09mAlaska Airlines
Deal found 7/31$462

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 July 31, 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

Thu 9/4

10:40 am-11:59 pm

1 stop16h 19m

Santa Rosa Sonoma County

Mon 9/8

7:03 am-9:50 pm

1 stop11h 47m

$380

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 9/16

6:49 am-3:48 pm

2 stops11h 59m

Santa Rosa Sonoma County

Wed 9/24

4:19 pm-10:59 am

2 stops15h 40m

$409

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 9/12

4:45 pm-2:43 pm

2 stops24h 58m

Santa Rosa Sonoma County

Tue 10/7

6:51 pm-3:00 pm

2 stops17h 09m

$462

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 9/4

10:40 am-11:59 pm

1 stop16h 19m

$198

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 9/8

6:49 am-11:55 am

1 stop8h 06m

$236

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 9/12

4:45 pm-8:23 pm

1 stop30h 38m

$298

HamiltonSanta Rosa

YHM - STS

YHMSTS

Hamilton

Thu 9/4

6:00 am-11:50 pm

2 stops20h 50m

$301

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Fri 8/29

3:44 pm-11:37 am

1 stop22h 53m

$380

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

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, February is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of $202). Flying from Region of Ontario to Santa Rosa in June is currently the most expensive (average of $395). 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.

Reviews of airlines servicing Santa Rosa

Get insights into the airlines that provide service to Santa Rosa. 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 Santa Rosa. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Alaska Airlines and American Airlines from Ontario to Santa Rosa by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

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
10,000 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

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 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.

  • 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 Toronto Pearson Intl - Santa Rosa Sonoma County, Hamilton - Santa Rosa Sonoma County or Montreal Pierre Elliott Trudeau 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, February is the cheapest month in which you can book a flight from Region of Ontario to Santa Rosa (average of $202). Flying from Region of Ontario to Santa Rosa in June is currently the most expensive (average of $395). 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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