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Cheap flights from Ontario to San Francisco from $238

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Francisco departing on 1/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

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Alaska Airlines Logo
4:45 pm - 7:15 pmYYZ-STS
29h 30m2 stops
Alaska Airlines Logo
10:59 am - 3:35 pmSTS-YYZ
25h 36m2 stops
$420Alaska Airlines
Find Deal
Tue, Dec 9 - Sat, Dec 13
Alaska Airlines Logo
4:45 pm - 6:14 pmYYZ-STS
28h 29m2 stops
Alaska Airlines Logo
10:59 am - 3:35 pmSTS-YYZ
25h 36m2 stops
$428Alaska Airlines
Find Deal
Mon, Dec 8 - Sat, Dec 13
Alaska Airlines Logo
4:45 pm - 1:29 pmYYZ-STS
23h 44m1 stop
Alaska Airlines Logo
10:59 am - 3:35 pmSTS-YYZ
25h 36m2 stops
$437Alaska Airlines
Find Deal
Tue, Dec 9 - Sat, Dec 13
Alaska Airlines Logo
4:45 pm - 1:29 pmYYZ-STS
23h 44m1 stop
Alaska Airlines Logo
10:59 am - 3:35 pmSTS-YYZ
25h 36m2 stops
$444Alaska Airlines
Find Deal
Mon, Dec 8 - Sat, Dec 13
Alaska Airlines Logo
4:45 pm - 2:36 pmYYZ-STS
24h 51m2 stops
Alaska Airlines Logo
6:43 pm - 3:35 pmSTS-YYZ
17h 52m2 stops
$446Alaska Airlines
Find Deal
Tue, Dec 9 - Wed, Dec 10
Alaska Airlines Logo
4:45 pm - 1:29 pmYYZ-STS
23h 44m1 stop
Alaska Airlines Logo
7:55 pm - 3:35 pmSTS-YYZ
16h 40m1 stop
$447Alaska Airlines
Find Deal
Tue, Dec 9 - Wed, Dec 10
Alaska Airlines Logo
4:45 pm - 3:24 pmYYZ-STS
25h 39m2 stops
Alaska Airlines Logo
5:59 pm - 3:35 pmSTS-YYZ
18h 36m2 stops
$450Alaska Airlines
Find Deal
Fri, Dec 12 - Sat, Dec 13
American Airlines Logo
5:10 pm - 12:27 pmYYZ-STS
22h 17m2 stops
American Airlines Logo
4:26 pm - 10:56 amSTS-YYZ
15h 30m2 stops
$460American Airlines
Find Deal
Wed, Dec 10 - Thu, Dec 11
Alaska Airlines Logo
4:45 pm - 7:15 pmYYZ-STS
29h 30m2 stops
Alaska Airlines Logo
7:55 pm - 3:35 pmSTS-YYZ
16h 40m1 stop
$464Alaska Airlines
Find Deal
Tue, Dec 9 - Sun, Dec 14
American Airlines Logo
6:24 pm - 12:27 pmYYZ-STS
21h 03m2 stops
American Airlines Logo
4:26 pm - 9:49 amSTS-YYZ
14h 23m2 stops
$465American Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15

American Airlines flights from Region of Ontario to Santa Rosa

Our best American Airlines deals on Region of Ontario to Santa Rosa flight tickets
American Airlines
Dec 10
YYZ5:10 pmToronto Pearson Intl
22h 17m
2 stops
STS12:27 pmSanta Rosa Sonoma County
Dec 11
STS4:26 pmSanta Rosa Sonoma County
15h 30m
2 stops
YYZ10:56 amToronto Pearson Intl
$460
Find similar
American Airlines
Dec 8
YYZ6:24 pmToronto Pearson Intl
21h 03m
2 stops
STS12:27 pmSanta Rosa Sonoma County
Dec 15
STS4:26 pmSanta Rosa Sonoma County
14h 23m
2 stops
YYZ9:49 amToronto Pearson Intl
$465
Find similar
American Airlines
Dec 13
YYZ6:15 pmToronto Pearson Intl
21h 12m
2 stops
STS12:27 pmSanta Rosa Sonoma County
Dec 14
STS4:26 pmSanta Rosa Sonoma County
14h 51m
2 stops
YYZ10:17 amToronto Pearson Intl
$496
Find similar

Alaska Airlines flights from Region of Ontario to Santa Rosa

Our best Alaska Airlines deals on Region of Ontario to Santa Rosa flight tickets
Alaska Airlines
Dec 9
YYZ4:45 pmToronto Pearson Intl
29h 30m
2 stops
STS7:15 pmSanta Rosa Sonoma County
Dec 13
STS10:59 amSanta Rosa Sonoma County
25h 36m
2 stops
YYZ3:35 pmToronto Pearson Intl
$420
Find similar
Alaska Airlines
Dec 8
YYZ4:45 pmToronto Pearson Intl
28h 29m
2 stops
STS6:14 pmSanta Rosa Sonoma County
Dec 13
STS10:59 amSanta Rosa Sonoma County
25h 36m
2 stops
YYZ3:35 pmToronto Pearson Intl
$428
Find similar
Alaska Airlines
Dec 9
YYZ4:45 pmToronto Pearson Intl
23h 44m
1 stop
STS1:29 pmSanta Rosa Sonoma County
Dec 13
STS10:59 amSanta Rosa Sonoma County
25h 36m
2 stops
YYZ3:35 pmToronto Pearson Intl
$437
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of 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, momondo users made 832,500 searches. Data last updated November 5, 2025.
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

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 12/9

4:45 pm-7:15 pm

2 stops29h 30m

Santa Rosa Sonoma County

Sat 12/13

10:59 am-3:35 pm

2 stops25h 36m

$420

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 12/8

4:45 pm-6:14 pm

2 stops28h 29m

Santa Rosa Sonoma County

Sat 12/13

10:59 am-3:35 pm

2 stops25h 36m

$428

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 12/9

4:45 pm-1:29 pm

1 stop23h 44m

Santa Rosa Sonoma County

Sat 12/13

10:59 am-3:35 pm

2 stops25h 36m

$437

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 12/8

4:45 pm-1:29 pm

1 stop23h 44m

Santa Rosa Sonoma County

Sat 12/13

10:59 am-3:35 pm

2 stops25h 36m

$444

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 12/9

4:45 pm-2:36 pm

2 stops24h 51m

Santa Rosa Sonoma County

Wed 12/10

6:43 pm-3:35 pm

2 stops17h 52m

$446

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 12/9

4:45 pm-1:29 pm

1 stop23h 44m

Santa Rosa Sonoma County

Wed 12/10

7:55 pm-3:35 pm

1 stop16h 40m

$447

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 12/12

4:45 pm-3:24 pm

2 stops25h 39m

Santa Rosa Sonoma County

Sat 12/13

5:59 pm-3:35 pm

2 stops18h 36m

$450

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 12/10

5:10 pm-12:27 pm

2 stops22h 17m

Santa Rosa Sonoma County

Thu 12/11

4:26 pm-10:56 am

2 stops15h 30m

$460

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 12/9

4:45 pm-7:15 pm

2 stops29h 30m

Santa Rosa Sonoma County

Sun 12/14

7:55 pm-3:35 pm

1 stop16h 40m

$464

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 12/8

6:24 pm-12:27 pm

2 stops21h 03m

Santa Rosa Sonoma County

Mon 12/15

4:26 pm-9:49 am

2 stops14h 23m

$465

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Francisco from

How to get the cheapest flight ticket from Region of Ontario to Santa Rosa

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Santa Rosa Sonoma County?

Alaska Airlines and American Airlines are the most popular carriers operating from Ontario to Santa Rosa Sonoma County

What airlines fly to Santa Rosa?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to Santa Rosa from Region of Ontario according to our data. Air Canada is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Santa Rosa. Keep in mind that there are 7 different airlines that fly to Santa Rosa on a routine basis, so you have a few additional options to choose from.

Cheap Region of Ontario to Santa Rosa flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Santa Rosa

Direct flights

None
There are no direct flights from Region of Ontario to Santa Rosa. There are no popular flight routes from Region of Ontario to Santa Rosa.
Search flight deals

  • When did momondo last update prices for flights from Ontario to Santa Rosa Sonoma County Airport?

    Prices for flights from Ontario to Santa Rosa Sonoma County Airport refresh daily.

  • How old do you have to be to fly from Ontario to Santa Rosa Sonoma County Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Santa Rosa Sonoma County Airport.

  • What documentation or ID do you need to fly to Santa Rosa Sonoma County Airport?

    The travel and health documents required for your trip to Santa Rosa Sonoma County Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Santa Rosa Sonoma County Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Fort Bragg
Mendocino
Ukiah
Little River
Point Arena

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Santa Rosa?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Santa Rosa for you.

Can I find flights from Ontario to Santa Rosa with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Santa Rosa from Ontario with this policy.

How can momondo help me find flights from Ontario to Santa Rosa?

momondo helps you find the best flight between Ontario and Santa Rosa by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Santa Rosa right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Santa Rosa flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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