Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Ontario to San Francisco from $264

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 11/21. 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
1 adult, Economy, 0 bags

Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:30 am - 4:05 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
12h 35m2 stops Minneapolis St Paul Salt Lake City
Delta Logo
4:47 pm - 11:19 amSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
15h 32m2 stops Salt Lake City New York John F Kennedy Intl
$469Delta
Wed, Oct 21 - Tue, Nov 17
Delta Logo
6:30 am - 4:05 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
12h 35m2 stops Minneapolis St Paul Salt Lake City
Delta Logo
11:29 am - 11:11 pmSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
8h 42m2 stops Salt Lake City Minneapolis St Paul
$490Delta
Wed, Oct 21 - Wed, Nov 11
Alaska Airlines Logo
5:15 pm - 12:21 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
22h 06m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:43 pm - 4:05 pmSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
20h 22m1 stop Seattle/Tacoma Intl
$498Alaska Airlines
Tue, Nov 17 - Mon, Nov 23
American Airlines Logo
5:12 pm - 12:14 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
22h 02m1 stop Dallas/Fort Worth
American Airlines Logo
4:29 pm - 10:16 amSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
14h 47m2 stops Phoenix Sky Harbor Intl Philadelphia
$508American Airlines
Tue, Nov 17 - Mon, Nov 23
Alaska Airlines Logo
5:15 pm - 3:50 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
25h 35m2 stops Seattle/Tacoma Intl Santa Ana J. Wayne/Orange Cnty
Alaska Airlines Logo
6:42 pm - 4:05 pmSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
18h 23m2 stops Portland Seattle/Tacoma Intl
$513Alaska Airlines
Tue, Nov 17 - Mon, Nov 23
Delta Logo
6:30 am - 4:05 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
12h 35m2 stops Minneapolis St Paul Salt Lake City
Delta Logo
11:29 am - 11:11 pmSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
8h 42m2 stops Salt Lake City Minneapolis St Paul
$518Delta
Fri, Oct 23 - Sat, Nov 14
Delta Logo
6:30 am - 4:05 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
12h 35m2 stops Minneapolis St Paul Salt Lake City
Delta Logo
11:21 am - 11:15 pmSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
8h 54m2 stops Salt Lake City Minneapolis St Paul
$524Delta
Sat, Oct 24 - Tue, Oct 27
Delta Logo
6:00 am - 4:05 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
13h 05m2 stops Detroit Metropolitan Wayne County Salt Lake City
Delta Logo
11:21 am - 11:15 pmSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
8h 54m2 stops Salt Lake City Minneapolis St Paul
$525Delta
Sat, Oct 24 - Tue, Oct 27
Delta Logo
7:00 am - 10:41 amYUL  Montreal Pierre Elliott Trudeau Intl-STS Santa Rosa Sonoma County
30h 41m2 stops Atlanta Hartsfield-Jackson Salt Lake City
Delta Logo
11:21 am - 11:22 pmSTS  Santa Rosa Sonoma County-YUL Montreal Pierre Elliott Trudeau Intl
9h 01m2 stops Salt Lake City Minneapolis St Paul
$528Delta
Tue, Oct 20 - Sat, Oct 24
American Airlines Logo
7:15 pm - 3:37 pmYYZ  Toronto Pearson Intl-STS Santa Rosa Sonoma County
23h 22m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl
American Airlines Logo
4:08 pm - 10:59 amSTS  Santa Rosa Sonoma County-YYZ Toronto Pearson Intl
15h 51m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl
$529American Airlines
Wed, Aug 19 - Tue, Sep 8

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Delta flights from Region of Ontario to Santa Rosa

Our best Delta deals on Region of Ontario to Santa Rosa flight tickets
Delta
Oct 21
YYZ6:30 amToronto Pearson Intl
12h 35m
2 stops
STS4:05 pmSanta Rosa Sonoma County
Nov 17
STS4:47 pmSanta Rosa Sonoma County
15h 32m
2 stops
YYZ11:19 amToronto Pearson Intl
$469
Delta
Oct 21
YYZ6:30 amToronto Pearson Intl
12h 35m
2 stops
STS4:05 pmSanta Rosa Sonoma County
Nov 11
STS11:29 amSanta Rosa Sonoma County
8h 42m
2 stops
YYZ11:11 pmToronto Pearson Intl
$490
Delta
Oct 24
YYZ6:30 amToronto Pearson Intl
12h 35m
2 stops
STS4:05 pmSanta Rosa Sonoma County
Oct 27
STS11:21 amSanta Rosa Sonoma County
8h 54m
2 stops
YYZ11:15 pmToronto Pearson Intl
$517

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
Nov 17
YYZ5:12 pmToronto Pearson Intl
22h 02m
1 stop
STS12:14 pmSanta Rosa Sonoma County
Nov 23
STS4:29 pmSanta Rosa Sonoma County
14h 47m
2 stops
YYZ10:16 amToronto Pearson Intl
$508
American Airlines
Aug 19
YYZ7:15 pmToronto Pearson Intl
23h 22m
2 stops
STS3:37 pmSanta Rosa Sonoma County
Sep 8
STS4:08 pmSanta Rosa Sonoma County
15h 51m
2 stops
YYZ10:59 amToronto Pearson Intl
$529
American Airlines
Aug 19
YYZ6:46 amToronto Pearson Intl
8h 23m
1 stop
STS12:09 pmSanta Rosa Sonoma County
Sep 11
STS4:21 pmSanta Rosa Sonoma County
14h 57m
2 stops
YYZ10:18 amToronto Pearson Intl
$550

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 August 6, 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

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Wed 10/21

6:30 am-4:05 pm

2 stops12h 35m

Santa Rosa Sonoma County

Tue 11/17

4:47 pm-11:19 am

2 stops15h 32m

$469
Quickest round-trip

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Wed 10/21

6:30 am-4:05 pm

2 stops12h 35m

Santa Rosa Sonoma County

Wed 11/11

11:29 am-11:11 pm

2 stops8h 42m

$490

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Tue 11/17

5:15 pm-12:21 pm

1 stop22h 06m

Santa Rosa Sonoma County

Mon 11/23

4:43 pm-4:05 pm

1 stop20h 22m

$498

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Tue 11/17

5:12 pm-12:14 pm

1 stop22h 02m

Santa Rosa Sonoma County

Mon 11/23

4:29 pm-10:16 am

2 stops14h 47m

$508

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Tue 11/17

5:15 pm-3:50 pm

2 stops25h 35m

Santa Rosa Sonoma County

Mon 11/23

6:42 pm-4:05 pm

2 stops18h 23m

$513

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Fri 10/23

6:30 am-4:05 pm

2 stops12h 35m

Santa Rosa Sonoma County

Sat 11/14

11:29 am-11:11 pm

2 stops8h 42m

$518

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Sat 10/24

6:30 am-4:05 pm

2 stops12h 35m

Santa Rosa Sonoma County

Tue 10/27

11:21 am-11:15 pm

2 stops8h 54m

$524

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Sat 10/24

6:00 am-4:05 pm

2 stops13h 05m

Santa Rosa Sonoma County

Tue 10/27

11:21 am-11:15 pm

2 stops8h 54m

$525

MontrealSanta Rosa

YUL Montreal Pierre Elliott Trudeau Intl - STS Santa Rosa Sonoma County

YULSTS

Montreal Pierre Elliott Trudeau Intl

Tue 10/20

7:00 am-10:41 am

2 stops30h 41m

Santa Rosa Sonoma County

Sat 10/24

11:21 am-11:22 pm

2 stops9h 01m

$528

TorontoSanta Rosa

YYZ Toronto Pearson Intl - STS Santa Rosa Sonoma County

YYZSTS

Toronto Pearson Intl

Wed 8/19

7:15 pm-3:37 pm

2 stops23h 22m

Santa Rosa Sonoma County

Tue 9/8

4:08 pm-10:59 am

2 stops15h 51m

$529

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 50m

Direct flights

None
The fastest flight from Region of Ontario to Santa Rosa takes 11h 50m
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

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
Ukiah
Mendocino
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.

An easier way to manage your Santa Rosa trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 9/5
Sat 9/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States