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Cheap flights from Ontario to San Francisco from $293

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 9/8. 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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Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:46 am - 12:12 pm
YYZ
-
STS
8h 26m
1 stop
American Airlines Logo
4:21 pm - 10:45 am
STS
-
YYZ
15h 24m
2 stops
$606American Airlines
Wed, Sep 16 - Mon, Sep 21
American Airlines Logo
6:46 am - 3:47 pm
YYZ
-
STS
12h 01m
2 stops
American Airlines Logo
4:21 pm - 10:45 am
STS
-
YYZ
15h 24m
2 stops
$611American Airlines
Wed, Sep 16 - Mon, Sep 21
American Airlines Logo
5:30 pm - 12:03 pm
YUL
-
STS
21h 33m
2 stops
American Airlines Logo
4:12 pm - 11:43 am
STS
-
YUL
16h 31m
2 stops
$643American Airlines
Thu, Jul 2 - Wed, Jul 8
Alaska Airlines Logo
4:55 pm - 12:46 pm
YYZ
-
STS
22h 51m
1 stop
Alaska Airlines Logo
5:31 pm - 3:45 pm
STS
-
YYZ
19h 14m
1 stop
$685Alaska Airlines
Wed, Sep 16 - Mon, Sep 21
American Airlines Logo
6:26 pm - 12:03 pm
YYZ
-
STS
20h 37m
2 stops
American Airlines Logo
4:20 pm - 12:35 pm
STS
-
YYZ
17h 15m
2 stops
$688American Airlines
Tue, Jun 2 - Wed, Jun 3
American Airlines Logo
6:26 pm - 12:03 pm
YYZ
-
STS
20h 37m
2 stops
American Airlines Logo
12:45 pm - 10:15 am
STS
-
YYZ
18h 30m
2 stops
$696American Airlines
Tue, Jun 2 - Fri, Jun 5
American Airlines Logo
6:28 pm - 12:09 pm
YYZ
-
STS
20h 41m
1 stop
American Airlines Logo
4:08 pm - 10:59 am
STS
-
YYZ
15h 51m
2 stops
$700American Airlines
Mon, Aug 24 - Tue, Aug 25
American Airlines Logo
2:55 pm - 12:03 pm
YYZ
-
STS
24h 08m
1 stop
American Airlines Logo
4:20 pm - 12:35 pm
STS
-
YYZ
17h 15m
2 stops
$703American Airlines
Sun, May 31 - Wed, Jun 3
American Airlines Logo
6:46 am - 3:42 pm
YYZ
-
STS
11h 56m
2 stops
American Airlines Logo
1:00 pm - 10:59 am
STS
-
YYZ
18h 59m
2 stops
$705American Airlines
Fri, Jul 3 - Sun, Jul 5
American Airlines Logo
6:46 am - 12:09 pm
YYZ
-
STS
8h 23m
1 stop
American Airlines Logo
4:08 pm - 10:59 am
STS
-
YYZ
15h 51m
2 stops
$706American Airlines
Tue, Aug 18 - Mon, Aug 31

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
Sep 16
YYZ6:46 amToronto Pearson Intl
8h 26m
1 stop
STS12:12 pmSanta Rosa Sonoma County
Sep 21
STS4:21 pmSanta Rosa Sonoma County
15h 24m
2 stops
YYZ10:45 amToronto Pearson Intl
$606
American Airlines
Sep 16
YYZ6:46 amToronto Pearson Intl
12h 01m
2 stops
STS3:47 pmSanta Rosa Sonoma County
Sep 21
STS4:21 pmSanta Rosa Sonoma County
15h 24m
2 stops
YYZ10:45 amToronto Pearson Intl
$611
American Airlines
Jul 2
YUL5:30 pmMontreal Pierre Elliott Trudeau Intl
21h 33m
2 stops
STS12:03 pmSanta Rosa Sonoma County
Jul 8
STS4:12 pmSanta Rosa Sonoma County
16h 31m
2 stops
YUL11:43 amMontreal Pierre Elliott Trudeau Intl
$643

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
Sep 16
YYZ4:55 pmToronto Pearson Intl
22h 51m
1 stop
STS12:46 pmSanta Rosa Sonoma County
Sep 21
STS5:31 pmSanta Rosa Sonoma County
19h 14m
1 stop
YYZ3:45 pmToronto Pearson Intl
$685
Alaska Airlines
Aug 19
YYZ1:15 pmToronto Pearson Intl
11h 41m
2 stops
STS9:56 pmSanta Rosa Sonoma County
Aug 29
STS8:07 amSanta Rosa Sonoma County
11h 47m
2 stops
YYZ10:54 pmToronto Pearson Intl
$732
Alaska Airlines
Aug 19
YYZ1:15 pmToronto Pearson Intl
11h 41m
2 stops
STS9:56 pmSanta Rosa Sonoma County
Aug 28
STS6:53 pmSanta Rosa Sonoma County
25h 01m
2 stops
YYZ10:54 pmToronto Pearson Intl
$784

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 May 10, 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

Wed 9/16

6:46 am-12:12 pm

1 stop8h 26m

Santa Rosa Sonoma County

Mon 9/21

4:21 pm-10:45 am

2 stops15h 24m

$606

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 9/16

6:46 am-3:47 pm

2 stops12h 01m

Santa Rosa Sonoma County

Mon 9/21

4:21 pm-10:45 am

2 stops15h 24m

$611

MontrealSanta Rosa

YUL - STS

YULSTS

Montreal Pierre Elliott Trudeau Intl

Thu 7/2

5:30 pm-12:03 pm

2 stops21h 33m

Santa Rosa Sonoma County

Wed 7/8

4:12 pm-11:43 am

2 stops16h 31m

$643

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 9/16

4:55 pm-12:46 pm

1 stop22h 51m

Santa Rosa Sonoma County

Mon 9/21

5:31 pm-3:45 pm

1 stop19h 14m

$685

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 6/2

6:26 pm-12:03 pm

2 stops20h 37m

Santa Rosa Sonoma County

Wed 6/3

4:20 pm-12:35 pm

2 stops17h 15m

$688

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 6/2

6:26 pm-12:03 pm

2 stops20h 37m

Santa Rosa Sonoma County

Fri 6/5

12:45 pm-10:15 am

2 stops18h 30m

$696

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 8/24

6:28 pm-12:09 pm

1 stop20h 41m

Santa Rosa Sonoma County

Tue 8/25

4:08 pm-10:59 am

2 stops15h 51m

$700

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Sun 5/31

2:55 pm-12:03 pm

1 stop24h 08m

Santa Rosa Sonoma County

Wed 6/3

4:20 pm-12:35 pm

2 stops17h 15m

$703

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Fri 7/3

6:46 am-3:42 pm

2 stops11h 56m

Santa Rosa Sonoma County

Sun 7/5

1:00 pm-10:59 am

2 stops18h 59m

$705

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 8/18

6:46 am-12:09 pm

1 stop8h 23m

Santa Rosa Sonoma County

Mon 8/31

4:08 pm-10:59 am

2 stops15h 51m

$706

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

8h 19m

Direct flights

None
The fastest flight from Region of Ontario to Santa Rosa takes 8h 19m
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.
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Frequently asked questions about flying from Ontario to Santa Rosa

  • 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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