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Santa Rosa

$281+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
Jul 24 — Jul 311
Fri 7/24
Fri 7/31
1 adult, Economy
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Cheap 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 June 24, 2026.

This Delta deal was found by Cheapflights users on 6/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:00 am
YYZ
-
STS
2 stops13h 08m
Delta
Fri 12/44:55 pm
STS
-
YYZ
2 stops17h 14m
Delta
Deal found 6/21$535
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Wed 7/157:17 am
YYZ
-
STS
2 stops35h 25m
American Airlines
Sat 7/184:12 pm
STS
-
YYZ
2 stops17h 24m
American Airlines
Deal found 6/24$542
This American Airlines deal was found by Cheapflights users on 6/23. 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 7/286:02 pm
YYZ
-
STS
2 stops21h 01m
American Airlines
Tue 8/1812:58 pm
STS
-
YYZ
2 stops18h 19m
American Airlines
Deal found 6/23$543
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/286:46 am
YYZ
-
STS
1 stop8h 17m
American Airlines
Thu 8/1312:58 pm
STS
-
YYZ
2 stops20h 35m
American Airlines
Deal found 6/24$550
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am
YUL
-
STS
2 stops12h 08m
Delta
Wed 11/44:55 pm
STS
-
YUL
2 stops27h 56m
Delta
Deal found 6/22$563
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/286:02 pm
YYZ
-
STS
2 stops21h 01m
American Airlines
Sun 8/1612:58 pm
STS
-
YYZ
2 stops20h 35m
American Airlines
Deal found 6/24$567
This American Airlines deal was found by Cheapflights users on 6/22. 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.
Wed 7/296:46 am
YYZ
-
STS
1 stop8h 17m
American Airlines
Thu 8/1312:58 pm
STS
-
YYZ
2 stops26h 32m
American Airlines
Deal found 6/22$568
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/267:20 am
YYZ
-
STS
2 stops35h 22m
American Airlines
Fri 8/144:08 pm
STS
-
YYZ
2 stops19h 53m
American Airlines
Deal found 6/24$574
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/178:35 pm
YYZ
-
STS
1 stop23h 41m
Multiple Airlines
Mon 7/201:06 pm
STS
-
YYZ
1 stop25h 03m
Multiple Airlines
Deal found 6/21$614
This American Airlines deal was found by Cheapflights users on 6/22. 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 9/176:46 am
YYZ
-
STS
2 stops12h 04m
American Airlines
Tue 9/294:21 pm
STS
-
YYZ
2 stops15h 38m
American Airlines
Deal found 6/22$619
This American Airlines deal was found by Cheapflights users on 6/24. 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 8/246:46 am
YYZ
-
STS
1 stop8h 23m
American Airlines
Mon 8/314:08 pm
STS
-
YYZ
2 stops15h 51m
American Airlines
Deal found 6/24$626
This American Airlines deal was found by Cheapflights users on 6/20. 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.
Wed 7/223:48 pm
YUL
-
STS
1 stop23h 15m
American Airlines
Thu 7/304:12 pm
STS
-
YUL
2 stops26h 32m
American Airlines
Deal found 6/20$697

Find 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 June 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$509
(American Airlines)

One-way from

$281
(Kiwi.com)

Popular in

July

Cheapest in

November

Average price

$441
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.
Search Deals
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. 9% potential increase in price ($42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
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 June 24, 2026.
Use the filters below to find and compare flights from Ontario to Santa Rosa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 12/2

6:00 am-4:08 pm

2 stops13h 08m

Santa Rosa Sonoma County

Fri 12/4

4:55 pm-1:09 pm

2 stops17h 14m

$535

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 11/3

7:00 am-4:08 pm

2 stops12h 08m

Santa Rosa Sonoma County

Wed 11/4

4:55 pm-5:03 pm

2 stops21h 08m

$563

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 9/16

4:55 pm-9:59 pm

1 stop8h 04m

Santa Rosa Sonoma County

Tue 9/29

1:40 pm-3:45 pm

2 stops23h 05m

$638

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 9/22

4:55 pm-9:59 pm

1 stop8h 04m

Santa Rosa Sonoma County

Sat 9/26

6:53 pm-3:45 pm

2 stops17h 52m

$650

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 9/17

4:55 pm-9:59 pm

1 stop8h 04m

Santa Rosa Sonoma County

Tue 9/29

5:34 pm-3:45 pm

1 stop19h 11m

$721

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Mon 7/13

12:30 pm-12:03 pm

2 stops26h 33m

Santa Rosa Sonoma County

Fri 8/21

4:08 pm-11:43 am

2 stops16h 35m

$733

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 7/14

5:30 pm-3:42 pm

2 stops25h 12m

Santa Rosa Sonoma County

Thu 8/20

12:39 pm-1:46 pm

2 stops22h 07m

$733

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Mon 7/13

12:30 pm-12:03 pm

2 stops26h 33m

Santa Rosa Sonoma County

Tue 8/25

12:58 pm-11:43 am

2 stops19h 45m

$733

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Mon 7/13

10:30 am-12:03 pm

2 stops28h 33m

Santa Rosa Sonoma County

Thu 8/20

12:39 pm-1:46 pm

2 stops22h 07m

$733

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Wed 7/15

5:30 pm-3:42 pm

2 stops25h 12m

Santa Rosa Sonoma County

Thu 8/20

12:39 pm-2:44 pm

1 stop23h 05m

$733

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 39 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 $638, Delta can have you in Santa Rosa from Region of Ontario in 8h 04m. 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 Toronto Pearson Intl - Santa Rosa Sonoma County, Montreal Pierre Elliott Trudeau Intl - Santa Rosa Sonoma County or Hamilton - 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.

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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