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Cheap flights from Ontario to San Francisco from $239

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 2/24. 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 - 10:11 am
YYZ
-
STS
20h 26m
2 stops
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$416Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 11:50 pm
YYZ
-
STS
10h 05m
1 stop
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$417Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 10:11 am
YYZ
-
STS
20h 26m
2 stops
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$422Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 11:50 pm
YYZ
-
STS
10h 05m
1 stop
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$428Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 11:50 pm
YYZ
-
STS
10h 05m
1 stop
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$430Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 10:11 am
YYZ
-
STS
20h 26m
2 stops
Alaska Airlines Logo
6:50 pm - 3:35 pm
STS
-
YYZ
17h 45m
2 stops
$442Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 11:50 pm
YYZ
-
STS
10h 05m
1 stop
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$446Alaska Airlines
Thu, Mar 5 - Tue, Mar 10
Alaska Airlines Logo
4:45 pm - 10:11 am
YYZ
-
STS
20h 26m
2 stops
Alaska Airlines Logo
7:15 am - 3:35 pm
STS
-
YYZ
29h 20m
2 stops
$447Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 10:11 am
YYZ
-
STS
20h 26m
2 stops
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$448Alaska Airlines
Fri, Feb 27 - Mon, Mar 2
Alaska Airlines Logo
4:45 pm - 10:11 am
YYZ
-
STS
20h 26m
2 stops
Alaska Airlines Logo
7:57 pm - 3:35 pm
STS
-
YYZ
16h 38m
1 stop
$462Alaska Airlines
Fri, Mar 6 - Tue, Mar 10

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
Feb 26
YYZ4:08 pmToronto Pearson Intl
23h 25m
2 stops
STS12:33 pmSanta Rosa Sonoma County
Mar 16
STS4:23 pmSanta Rosa Sonoma County
15h 33m
2 stops
YYZ10:56 amToronto Pearson Intl
$549
American Airlines
Mar 7
YYZ6:10 amToronto Pearson Intl
12h 37m
2 stops
STS3:47 pmSanta Rosa Sonoma County
Mar 10
STS4:23 pmSanta Rosa Sonoma County
15h 33m
2 stops
YYZ10:56 amToronto Pearson Intl
$636
American Airlines
Mar 5
YYZ6:10 amToronto Pearson Intl
12h 43m
2 stops
STS3:53 pmSanta Rosa Sonoma County
Mar 9
STS4:23 pmSanta Rosa Sonoma County
17h 07m
2 stops
YYZ12:30 pmToronto Pearson Intl
$712

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
Feb 27
YYZ4:45 pmToronto Pearson Intl
20h 26m
2 stops
STS10:11 amSanta Rosa Sonoma County
Mar 2
STS7:57 pmSanta Rosa Sonoma County
16h 38m
1 stop
YYZ3:35 pmToronto Pearson Intl
$416
Alaska Airlines
Feb 27
YYZ4:45 pmToronto Pearson Intl
10h 05m
1 stop
STS11:50 pmSanta Rosa Sonoma County
Mar 2
STS7:57 pmSanta Rosa Sonoma County
16h 38m
1 stop
YYZ3:35 pmToronto Pearson Intl
$417
Alaska Airlines
Feb 27
YYZ4:45 pmToronto Pearson Intl
20h 26m
2 stops
STS10:11 amSanta Rosa Sonoma County
Mar 2
STS7:57 pmSanta Rosa Sonoma County
16h 38m
1 stop
YYZ3:35 pmToronto Pearson Intl
$422

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 February 3, 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

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-10:11 am

2 stops20h 26m

Santa Rosa Sonoma County

Mon 3/2

7:57 pm-3:35 pm

1 stop16h 38m

$416

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-11:50 pm

1 stop10h 05m

Santa Rosa Sonoma County

Mon 3/2

7:57 pm-3:35 pm

1 stop16h 38m

$417

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-10:11 am

2 stops20h 26m

Santa Rosa Sonoma County

Mon 3/2

7:57 pm-3:35 pm

1 stop16h 38m

$422

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-11:50 pm

1 stop10h 05m

Santa Rosa Sonoma County

Mon 3/2

7:57 pm-3:35 pm

1 stop16h 38m

$428

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-11:50 pm

1 stop10h 05m

Santa Rosa Sonoma County

Mon 3/2

7:57 pm-3:35 pm

1 stop16h 38m

$430

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-10:11 am

2 stops20h 26m

Santa Rosa Sonoma County

Mon 3/2

6:50 pm-3:35 pm

2 stops17h 45m

$442

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 3/5

4:45 pm-11:50 pm

1 stop10h 05m

Santa Rosa Sonoma County

Tue 3/10

7:57 pm-3:35 pm

1 stop16h 38m

$446

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-10:11 am

2 stops20h 26m

Santa Rosa Sonoma County

Mon 3/2

7:15 am-3:35 pm

2 stops29h 20m

$447

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 2/27

4:45 pm-10:11 am

2 stops20h 26m

Santa Rosa Sonoma County

Mon 3/2

7:57 pm-3:35 pm

1 stop16h 38m

$448

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 3/6

4:45 pm-10:11 am

2 stops20h 26m

Santa Rosa Sonoma County

Tue 3/10

7:57 pm-3:35 pm

1 stop16h 38m

$462

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 56% 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

10h 05m

Direct flights

None
The fastest flight from Region of Ontario to Santa Rosa takes 10h 05m
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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