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Cheap flights from Ontario to San Francisco from $261

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 7/9. 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
4:55 pm - 10:57 pm
YYZ
-
STS
9h 02m
1 stop
Alaska Airlines Logo
7:46 pm - 3:45 pm
STS
-
YYZ
16h 59m
1 stop
$527Alaska Airlines
Mon, May 4 - Mon, May 11
Alaska Airlines Logo
4:55 pm - 10:57 pm
YYZ
-
STS
9h 02m
1 stop
Alaska Airlines Logo
9:33 am - 3:45 pm
STS
-
YYZ
27h 12m
2 stops
$537Alaska Airlines
Mon, May 4 - Mon, May 11
Alaska Airlines Logo
4:55 pm - 10:01 am
YYZ
-
STS
20h 06m
2 stops
Alaska Airlines Logo
9:33 am - 3:45 pm
STS
-
YYZ
27h 12m
2 stops
$542Alaska Airlines
Mon, May 4 - Mon, May 11
Alaska Airlines Logo
4:55 pm - 10:57 pm
YYZ
-
STS
9h 02m
1 stop
Alaska Airlines Logo
1:13 pm - 3:45 pm
STS
-
YYZ
23h 32m
1 stop
$552Alaska Airlines
Sat, May 2 - Wed, May 6
Alaska Airlines Logo
4:55 pm - 10:57 pm
YYZ
-
STS
9h 02m
1 stop
Alaska Airlines Logo
7:23 am - 3:45 pm
STS
-
YYZ
29h 22m
2 stops
$591Alaska Airlines
Sat, May 2 - Wed, May 6
Alaska Airlines Logo
4:55 pm - 10:57 pm
YYZ
-
STS
9h 02m
1 stop
Alaska Airlines Logo
1:13 pm - 3:45 pm
STS
-
YYZ
23h 32m
1 stop
$598Alaska Airlines
Mon, Apr 27 - Tue, Apr 28
Multiple Airlines Logo
9:40 am - 11:01 pm
YYZ
-
STS
16h 21m
1 stop
Multiple Airlines Logo
7:59 am - 8:50 pm
STS
-
YYZ
9h 51m
1 stop
$633Multiple Airlines
Thu, May 7 - Thu, May 14
American Airlines Logo
2:32 pm - 12:26 pm
YUL
-
STS
24h 54m
2 stops
American Airlines Logo
12:56 pm - 11:44 am
STS
-
YUL
19h 48m
2 stops
$707American Airlines
Tue, Apr 28 - Sat, May 16
American Airlines Logo
4:16 pm - 12:26 pm
YUL
-
STS
23h 10m
2 stops
American Airlines Logo
12:56 pm - 11:44 am
STS
-
YUL
19h 48m
2 stops
$740American Airlines
Tue, Apr 28 - Thu, May 14
American Airlines Logo
4:16 pm - 12:26 pm
YUL
-
STS
23h 10m
2 stops
American Airlines Logo
12:56 pm - 12:18 pm
STS
-
YUL
20h 22m
2 stops
$772American Airlines
Tue, Apr 28 - Tue, May 19

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
May 4
YYZ4:55 pmToronto Pearson Intl
9h 02m
1 stop
STS10:57 pmSanta Rosa Sonoma County
May 11
STS7:46 pmSanta Rosa Sonoma County
16h 59m
1 stop
YYZ3:45 pmToronto Pearson Intl
$527
Alaska Airlines
May 4
YYZ4:55 pmToronto Pearson Intl
9h 02m
1 stop
STS10:57 pmSanta Rosa Sonoma County
May 11
STS9:33 amSanta Rosa Sonoma County
27h 12m
2 stops
YYZ3:45 pmToronto Pearson Intl
$537
Alaska Airlines
May 4
YYZ4:55 pmToronto Pearson Intl
20h 06m
2 stops
STS10:01 amSanta Rosa Sonoma County
May 11
STS9:33 amSanta Rosa Sonoma County
27h 12m
2 stops
YYZ3:45 pmToronto Pearson Intl
$542

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
Jul 9
YYZ6:46 amToronto Pearson Intl
8h 17m
1 stop
STS12:03 pmSanta Rosa Sonoma County
Jul 23
STS4:20 pmSanta Rosa Sonoma County
19h 14m
2 stops
YYZ2:34 pmToronto Pearson Intl
$651
American Airlines
Jun 11
YYZ6:18 pmToronto Pearson Intl
20h 47m
1 stop
STS12:05 pmSanta Rosa Sonoma County
Jun 17
STS12:45 pmSanta Rosa Sonoma County
19h 14m
2 stops
YYZ10:59 amToronto Pearson Intl
$652
American Airlines
Jul 12
YYZ6:02 pmToronto Pearson Intl
21h 23m
2 stops
STS12:25 pmSanta Rosa Sonoma County
Jul 28
STS4:20 pmSanta Rosa Sonoma County
15h 39m
2 stops
YYZ10:59 amToronto Pearson Intl
$667

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 March 25, 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
Quickest round-trip

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 5/4

4:55 pm-10:57 pm

1 stop9h 02m

Santa Rosa Sonoma County

Mon 5/11

7:46 pm-3:45 pm

1 stop16h 59m

$527

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 5/4

4:55 pm-10:57 pm

1 stop9h 02m

Santa Rosa Sonoma County

Mon 5/11

9:33 am-3:45 pm

2 stops27h 12m

$537

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 5/4

4:55 pm-10:01 am

2 stops20h 06m

Santa Rosa Sonoma County

Mon 5/11

9:33 am-3:45 pm

2 stops27h 12m

$542

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sat 5/2

4:55 pm-10:57 pm

1 stop9h 02m

Santa Rosa Sonoma County

Wed 5/6

1:13 pm-3:45 pm

1 stop23h 32m

$552

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sat 5/2

4:55 pm-10:57 pm

1 stop9h 02m

Santa Rosa Sonoma County

Wed 5/6

7:23 am-3:45 pm

2 stops29h 22m

$591

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 4/27

4:55 pm-10:57 pm

1 stop9h 02m

Santa Rosa Sonoma County

Tue 4/28

1:13 pm-3:45 pm

1 stop23h 32m

$598

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Thu 5/7

9:40 am-11:01 pm

1 stop16h 21m

Santa Rosa Sonoma County

Thu 5/14

7:59 am-8:50 pm

1 stop9h 51m

$633

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 4/28

2:32 pm-12:26 pm

2 stops24h 54m

Santa Rosa Sonoma County

Sat 5/16

12:56 pm-11:44 am

2 stops19h 48m

$707

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 4/28

4:16 pm-12:26 pm

2 stops23h 10m

Santa Rosa Sonoma County

Thu 5/14

12:56 pm-11:44 am

2 stops19h 48m

$740

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 4/28

4:16 pm-12:26 pm

2 stops23h 10m

Santa Rosa Sonoma County

Tue 5/19

12:56 pm-12:18 pm

2 stops20h 22m

$772

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

11h 23m

Direct flights

None
The fastest flight from Region of Ontario to Santa Rosa takes 11h 23m
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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