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Cheap flights from Ontario to San Francisco from $196

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 1/20. 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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Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
4:45 pm - 12:22 pm
YYZ
-
STS
22h 37m2 stops
Alaska Airlines Logo
6:50 am - 3:35 pm
STS
-
YYZ
29h 45m2 stops
$331Alaska Airlines
Tue, Jan 13 - Fri, Jan 23
Alaska Airlines Logo
4:45 pm - 10:35 am
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
6:50 am - 3:35 pm
STS
-
YYZ
29h 45m2 stops
$347Alaska Airlines
Tue, Jan 13 - Mon, Jan 19
Alaska Airlines Logo
4:45 pm - 12:22 pm
YYZ
-
STS
22h 37m2 stops
Alaska Airlines Logo
9:33 pm - 3:35 pm
STS
-
YYZ
15h 02m1 stop
$354Alaska Airlines
Tue, Jan 13 - Thu, Jan 22
Alaska Airlines Logo
4:45 pm - 10:35 am
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
9:33 pm - 3:35 pm
STS
-
YYZ
15h 02m1 stop
$359Alaska Airlines
Tue, Jan 13 - Fri, Jan 23
Alaska Airlines Logo
4:45 pm - 10:35 am
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
6:50 am - 3:35 pm
STS
-
YYZ
29h 45m2 stops
$364Alaska Airlines
Wed, Jan 14 - Tue, Jan 20
Alaska Airlines Logo
4:45 pm - 10:35 am
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
9:33 pm - 3:35 pm
STS
-
YYZ
15h 02m1 stop
$366Alaska Airlines
Tue, Jan 13 - Sun, Jan 18
Alaska Airlines Logo
4:45 pm - 11:59 pm
YYZ
-
STS
10h 14m1 stop
Alaska Airlines Logo
9:33 pm - 3:35 pm
STS
-
YYZ
15h 02m1 stop
$372Alaska Airlines
Thu, Jan 15 - Sun, Jan 18
Alaska Airlines Logo
4:45 pm - 11:59 pm
YYZ
-
STS
10h 14m1 stop
Alaska Airlines Logo
7:00 am - 3:35 pm
STS
-
YYZ
29h 35m2 stops
$376Alaska Airlines
Thu, Jan 15 - Sun, Jan 18
Alaska Airlines Logo
4:45 pm - 11:59 pm
YYZ
-
STS
10h 14m1 stop
Alaska Airlines Logo
6:50 am - 3:35 pm
STS
-
YYZ
29h 45m2 stops
$380Alaska Airlines
Mon, Jan 12 - Tue, Jan 20
Alaska Airlines Logo
4:45 pm - 10:35 am
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
9:33 pm - 3:35 pm
STS
-
YYZ
15h 02m1 stop
$381Alaska Airlines
Wed, Jan 14 - Sun, Jan 18

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
Jan 13
YYZ4:45 pmToronto Pearson Intl
22h 37m
2 stops
STS12:22 pmSanta Rosa Sonoma County
Jan 23
STS6:50 amSanta Rosa Sonoma County
29h 45m
2 stops
YYZ3:35 pmToronto Pearson Intl
$331
Find similar
Alaska Airlines
Jan 13
YYZ4:45 pmToronto Pearson Intl
20h 50m
1 stop
STS10:35 amSanta Rosa Sonoma County
Jan 19
STS6:50 amSanta Rosa Sonoma County
29h 45m
2 stops
YYZ3:35 pmToronto Pearson Intl
$347
Find similar
Alaska Airlines
Jan 13
YYZ4:45 pmToronto Pearson Intl
22h 37m
2 stops
STS12:22 pmSanta Rosa Sonoma County
Jan 21
STS7:00 amSanta Rosa Sonoma County
29h 35m
2 stops
YYZ3:35 pmToronto Pearson Intl
$354
Find similar

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 29
YYZ6:10 amToronto Pearson Intl
12h 41m
2 stops
STS3:51 pmSanta Rosa Sonoma County
Jan 2
STS4:21 pmSanta Rosa Sonoma County
14h 24m
2 stops
YYZ9:45 amToronto Pearson Intl
$2,040
Find similar
American Airlines
Dec 28
YYZ6:10 amToronto Pearson Intl
12h 41m
2 stops
STS3:51 pmSanta Rosa Sonoma County
Jan 2
STS6:45 amSanta Rosa Sonoma County
12h 59m
2 stops
YYZ10:44 pmToronto Pearson Intl
$2,227
Find similar
American Airlines
Dec 30
YYZ6:00 amToronto Pearson Intl
12h 51m
2 stops
STS3:51 pmSanta Rosa Sonoma County
Jan 2
STS4:21 pmSanta Rosa Sonoma County
14h 24m
2 stops
YYZ9:45 amToronto Pearson Intl
$2,231
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 December 18, 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 1/13

4:45 pm-12:22 pm

2 stops22h 37m

Santa Rosa Sonoma County

Fri 1/23

6:50 am-3:35 pm

2 stops29h 45m

$331

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 1/13

4:45 pm-10:35 am

1 stop20h 50m

Santa Rosa Sonoma County

Mon 1/19

6:50 am-3:35 pm

2 stops29h 45m

$347

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 1/13

4:45 pm-12:22 pm

2 stops22h 37m

Santa Rosa Sonoma County

Thu 1/22

9:33 pm-3:35 pm

1 stop15h 02m

$354

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 1/13

4:45 pm-10:35 am

1 stop20h 50m

Santa Rosa Sonoma County

Fri 1/23

9:33 pm-3:35 pm

1 stop15h 02m

$359

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 1/14

4:45 pm-10:35 am

1 stop20h 50m

Santa Rosa Sonoma County

Tue 1/20

6:50 am-3:35 pm

2 stops29h 45m

$364

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 1/13

4:45 pm-10:35 am

1 stop20h 50m

Santa Rosa Sonoma County

Sun 1/18

9:33 pm-3:35 pm

1 stop15h 02m

$366

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 1/15

4:45 pm-11:59 pm

1 stop10h 14m

Santa Rosa Sonoma County

Sun 1/18

9:33 pm-3:35 pm

1 stop15h 02m

$372

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 1/15

4:45 pm-11:59 pm

1 stop10h 14m

Santa Rosa Sonoma County

Sun 1/18

7:00 am-3:35 pm

2 stops29h 35m

$376

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 1/12

4:45 pm-11:59 pm

1 stop10h 14m

Santa Rosa Sonoma County

Tue 1/20

6:50 am-3:35 pm

2 stops29h 45m

$380

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 1/14

4:45 pm-10:35 am

1 stop20h 50m

Santa Rosa Sonoma County

Sun 1/18

9:33 pm-3:35 pm

1 stop15h 02m

$381

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

Can stopping save me money on Region of Ontario to Santa Rosa flights?

You could potentially save up to 53% on your flight if you consider stops on a Region of Ontario to Santa Rosa flight.

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

Fastest flight time

11h 51m

Direct flights

None
The fastest flight from Region of Ontario to Santa Rosa takes 11h 51m
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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