$264+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STS
Sep 4 — Sep 111
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Santa Rosa with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Santa Rosa
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Cheapest flights from Ontario to Santa RosaExplore 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 August 5, 2026.
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 August 5, 2026.
This Delta deal was found by Cheapflights users on 8/2. 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 10/216:30 am -
2 stops12h 35m
Tue 11/174:47 pm -
2 stops15h 32m
Deal found 8/2![Delta logo]()
$469
This Delta deal was found by Cheapflights users on 8/2. 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 10/216:30 am -
2 stops12h 35m
Wed 11/1111:29 am -
2 stops8h 42m
Deal found 8/2![Delta logo]()
$490
This Alaska Airlines deal was found by Cheapflights users on 8/1. 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.
Tue 11/175:15 pm -
1 stop22h 06m
Mon 11/234:43 pm -
1 stop20h 22m
Deal found 8/1![Alaska Airlines logo]()
$498
This American Airlines deal was found by Cheapflights users on 8/1. 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 11/175:12 pm -
1 stop22h 02m
Mon 11/234:29 pm -
2 stops14h 47m
Deal found 8/1![American Airlines logo]()
$508
This Delta deal was found by Cheapflights users on 8/2. 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.
Fri 10/236:30 am -
2 stops12h 35m
Sat 11/1411:29 am -
2 stops8h 42m
Deal found 8/2![Delta logo]()
$518
This Delta deal was found by Cheapflights users on 8/4. 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.
Sat 10/246:30 am -
2 stops12h 35m
Tue 10/2711:21 am -
2 stops8h 54m
Deal found 8/4![Delta logo]()
$524
This Delta deal was found by Cheapflights users on 8/4. 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 10/207:00 am -
2 stops30h 41m
Sat 10/2411:21 am -
2 stops9h 01m
Deal found 8/4![Delta logo]()
$528
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/197:15 pm -
2 stops23h 22m
Tue 9/84:08 pm -
2 stops15h 51m
Deal found 8/3![American Airlines logo]()
$529
This Delta deal was found by Cheapflights users on 8/2. 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.
Fri 10/236:30 am -
2 stops12h 35m
Mon 11/1611:29 am -
2 stops8h 42m
Deal found 8/2![Delta logo]()
$539
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/196:46 am -
1 stop8h 23m
Fri 9/114:21 pm -
2 stops14h 57m
Deal found 8/3![American Airlines logo]()
$550
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Fri 8/216:15 am -
2 stops12h 22m
Sat 9/54:08 pm -
2 stops17h 25m
Deal found 8/1![American Airlines logo]()
$552
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/83:45 pm -
1 stop23h 24m
Sat 8/1512:39 pm -
1 stop23h 05m
Deal found 8/3![American Airlines logo]()
$789
Best flights from Ontario to Santa RosaDiscover carefully curated flight deals from Ontario to Santa Rosa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
Discover carefully curated flight deals from Ontario to Santa Rosa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 5, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/1. 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.
Tue 11/175:15 pm -
2 stops25h 35m
Mon 11/236:42 pm -
2 stops18h 23m
Deal found 8/1![Alaska Airlines logo]()
$513
This Delta deal was found by Cheapflights users on 8/2. 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.
Sat 10/246:00 am -
2 stops13h 05m
Tue 10/2711:21 am -
2 stops8h 54m
Deal found 8/2![Delta logo]()
$518
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/247:29 am -
2 stops11h 08m
Sun 8/304:18 pm -
2 stops16h 25m
Deal found 8/3![American Airlines logo]()
$1,035
This Delta deal was found by Cheapflights users on 8/4. 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 10/207:00 am -
2 stops30h 41m
Sat 10/2411:21 am -
2 stops9h 01m
Deal found 8/4![Delta logo]()
$528
This Alaska Airlines deal was found by Cheapflights users on 8/3. 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 10/244:55 pm -
2 stops21h 22m
Tue 10/275:06 pm -
1 stop19h 59m
Deal found 8/3![Alaska Airlines logo]()
$651
Last-minute flights from Ontario to Santa RosaDiscover last-minute flight deals from Ontario to Santa Rosa. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Santa Rosa. Data last updated August 5, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/83:45 pm -
1 stop23h 24m
Sat 8/1512:39 pm -
1 stop23h 05m
Deal found 8/3![American Airlines logo]()
$789
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/133:45 pm -
1 stop23h 24m
Sat 8/1512:39 pm -
1 stop23h 05m
Deal found 8/3![American Airlines logo]()
$798
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/197:15 pm -
2 stops23h 22m
Tue 9/84:08 pm -
2 stops15h 51m
Deal found 8/3![American Airlines logo]()
$529
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/196:46 am -
1 stop8h 23m
Fri 9/114:21 pm -
2 stops14h 57m
Deal found 8/3![American Airlines logo]()
$550
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/193:14 pm -
2 stops27h 23m
Mon 9/712:39 pm -
2 stops23h 00m
Deal found 8/3![American Airlines logo]()
$671
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/202:55 pm -
1 stop24h 14m
Fri 9/1112:39 pm -
1 stop22h 20m
Deal found 8/3![American Airlines logo]()
$665
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Fri 8/216:15 am -
2 stops12h 22m
Sat 9/54:08 pm -
2 stops17h 25m
Deal found 8/1![American Airlines logo]()
$552
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Fri 8/216:15 am -
2 stops12h 22m
Sun 9/64:18 pm -
2 stops15h 41m
Deal found 8/1![American Airlines logo]()
$661
This American Airlines deal was found by Cheapflights users on 8/1. 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 8/226:46 am -
1 stop8h 23m
Sat 9/54:08 pm -
2 stops17h 25m
Deal found 8/1![American Airlines logo]()
$611
This American Airlines deal was found by Cheapflights users on 8/3. 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 8/236:46 am -
1 stop8h 23m
Fri 9/1112:39 pm -
1 stop22h 20m
Deal found 8/3![American Airlines logo]()
$609
This American Airlines deal was found by Cheapflights users on 8/1. 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 8/236:46 am -
1 stop8h 23m
Sun 9/64:18 pm -
2 stops15h 41m
Deal found 8/1![American Airlines logo]()
$659
This American Airlines deal was found by Cheapflights users on 8/2. 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 8/266:15 am -
2 stops12h 22m
Tue 9/14:08 pm -
2 stops19h 50m
Deal found 8/2![American Airlines logo]()
$555
One-way flights from Ontario to Santa RosaSearch for one-way flight options from Ontario to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
Search for one-way flight options from Ontario to Santa Rosa. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This Delta deal was found by Cheapflights users on 8/1. 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.
Sat 11/216:30 am -
2 stops12h 36m
Deal found 8/1![Delta logo]()
$264
This American Airlines deal was found by Cheapflights users on 8/5. 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 8/317:27 pm -
2 stops19h 42m
Deal found 8/5![American Airlines logo]()
$284
This Delta deal was found by Cheapflights users on 8/4. 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 10/146:00 am -
2 stops13h 05m
Deal found 8/4![Delta logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 9/243:50 pm -
2 stops27h 49m
Deal found 8/3![Multiple Airlines logo]()
$295
This American Airlines deal was found by Cheapflights users on 8/4. 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 10/106:46 am -
2 stops11h 55m
Deal found 8/4![American Airlines logo]()
$310
This Expedia deal was found by Cheapflights users on 8/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:30 am -
1 stop9h 20m
Deal found 8/3![Porter Airlines logo]()
$324
This American Airlines deal was found by Cheapflights users on 8/4. 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.
Fri 10/96:46 am -
2 stops12h 07m
Deal found 8/4![American Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 8/1. 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.
Sat 10/176:00 am -
2 stops31h 41m
Deal found 8/1![Delta logo]()
$332
This American Airlines deal was found by Cheapflights users on 8/4. 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 10/111:15 pm -
2 stops26h 17m
Deal found 8/4![American Airlines logo]()
$338
This American Airlines deal was found by Cheapflights users on 8/4. 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 10/136:46 am -
1 stop8h 27m
Deal found 8/4![American Airlines logo]()
$340
This American Airlines deal was found by Cheapflights users on 8/1. 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 10/171:01 pm -
2 stops29h 52m
Deal found 8/1![American Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 8/1. 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 10/185:34 pm -
2 stops25h 19m
Deal found 8/1![American Airlines logo]()
$405
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 August 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $469 (Delta) |
One-way from | $264 (Delta) |
Popular in | July |
Cheapest in | November |
Average price | $472 |
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 August 5, 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
Cheapest round-trip
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Tue 11/17
5:15 pm-3:50 pm
2 stops25h 35m
Santa Rosa Sonoma County
Mon 11/23
6:42 pm-4:05 pm
2 stops18h 23m
$513
Quickest round-trip
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Sat 10/24
6:00 am-4:05 pm
2 stops13h 05m
Santa Rosa Sonoma County
Tue 10/27
11:21 am-11:15 pm
2 stops8h 54m
$518
MontrealSanta Rosa
YUL Montreal Pierre Elliott Trudeau Intl - STS Santa Rosa Sonoma County
YULSTS
Montreal Pierre Elliott Trudeau Intl
Tue 10/20
7:00 am-10:41 am
2 stops30h 41m
Santa Rosa Sonoma County
Sat 10/24
11:21 am-11:22 pm
2 stops9h 01m
$528
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Sat 10/24
4:55 pm-11:17 am
2 stops21h 22m
Santa Rosa Sonoma County
Tue 10/27
5:06 pm-4:05 pm
1 stop19h 59m
$651
MontrealSanta Rosa
YUL Montreal Pierre Elliott Trudeau Intl - STS Santa Rosa Sonoma County
YULSTS
Montreal Pierre Elliott Trudeau Intl
Mon 8/24
7:29 am-3:37 pm
2 stops11h 08m
Santa Rosa Sonoma County
Sun 8/30
4:18 pm-11:43 am
2 stops16h 25m
$1,035
Cheapest one-way
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Sat 11/21
6:30 am-4:06 pm
2 stops12h 36m
$264
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Thu 10/15
6:00 am-4:05 pm
2 stops13h 05m
$290
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Wed 10/14
6:00 am-4:05 pm
2 stops13h 05m
$290
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Thu 9/24
3:50 pm-4:39 pm
2 stops27h 49m
$295
TorontoSanta Rosa
YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County
YYZSTS
Toronto Pearson Intl
Thu 9/24
9:30 am-3:50 pm
1 stop9h 20m
$324
Showing 1-10 of 20 resultsSorted by cheapest first
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.
YYZ-STS
YUL-STS
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
CAON-STS
YYZ-STS
YUL-STS
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.
Traveling to a place near Santa Rosa?
Book flights to Santa Rosa if you plan to visit one of these locationsFort Bragg
Ukiah
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