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Cheap flights from Ontario to San Francisco from C$ 270

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 20/1. 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

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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 p.m. - 12:22 p.m.
YYZ
-
STS
22h 37m2 stops
Alaska Airlines Logo
2:30 p.m. - 3:35 p.m.
STS
-
YYZ
22h 05m2 stops
C$ 527Alaska Airlines
Tue, 3 Feb - Wed, 4 Feb
Alaska Airlines Logo
4:45 p.m. - 10:35 a.m.
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
2:30 p.m. - 3:35 p.m.
STS
-
YYZ
22h 05m2 stops
C$ 555Alaska Airlines
Tue, 3 Feb - Wed, 4 Feb
Alaska Airlines Logo
4:45 p.m. - 10:35 a.m.
YYZ
-
STS
20h 50m1 stop
Alaska Airlines Logo
2:30 p.m. - 3:35 p.m.
STS
-
YYZ
22h 05m2 stops
C$ 575Alaska Airlines
Tue, 3 Feb - Wed, 4 Feb
Alaska Airlines Logo
4:45 p.m. - 9:51 p.m.
YYZ
-
STS
8h 06m1 stop
Alaska Airlines Logo
7:00 a.m. - 3:35 p.m.
STS
-
YYZ
29h 35m2 stops
C$ 632Alaska Airlines
Tue, 14 Apr - Wed, 15 Apr
American Airlines Logo
4:55 p.m. - 11:41 a.m.
YYZ
-
STS
21h 46m1 stop
American Airlines Logo
4:22 p.m. - 9:45 a.m.
STS
-
YYZ
14h 23m2 stops
C$ 664American Airlines
Wed, 27 May - Tue, 2 Jun
Alaska Airlines Logo
4:45 p.m. - 9:47 a.m.
YYZ
-
STS
20h 02m2 stops
Alaska Airlines Logo
1:22 p.m. - 3:35 p.m.
STS
-
YYZ
23h 13m2 stops
C$ 672Alaska Airlines
Tue, 14 Apr - Wed, 15 Apr
Alaska Airlines Logo
4:55 p.m. - 8:49 a.m.
YYZ
-
STS
18h 54m2 stops
Alaska Airlines Logo
5:21 p.m. - 3:45 p.m.
STS
-
YYZ
19h 24m2 stops
C$ 711Alaska Airlines
Wed, 27 May - Tue, 2 Jun
American Airlines Logo
4:55 p.m. - 11:41 a.m.
YYZ
-
STS
21h 46m1 stop
American Airlines Logo
12:18 p.m. - 12:28 p.m.
STS
-
YYZ
21h 10m1 stop
C$ 815American Airlines
Wed, 27 May - Tue, 2 Jun
American Airlines Logo
7:30 a.m. - 3:53 p.m.
YYZ
-
STS
11h 23m2 stops
American Airlines Logo
4:27 p.m. - 10:56 a.m.
STS
-
YYZ
15h 29m2 stops
C$ 988American Airlines
Mon, 9 Feb - Wed, 18 Feb

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
3 Feb
YYZ4:45 p.m.Toronto Pearson Intl
22h 37m
2 stops
STS12:22 p.m.Santa Rosa Sonoma County
4 Feb
STS2:30 p.m.Santa Rosa Sonoma County
22h 05m
2 stops
YYZ3:35 p.m.Toronto Pearson Intl
C$ 527
Find similar
Alaska Airlines
3 Feb
YYZ4:45 p.m.Toronto Pearson Intl
20h 50m
1 stop
STS10:35 a.m.Santa Rosa Sonoma County
4 Feb
STS2:30 p.m.Santa Rosa Sonoma County
22h 05m
2 stops
YYZ3:35 p.m.Toronto Pearson Intl
C$ 555
Find similar
Alaska Airlines
3 Feb
YYZ4:45 p.m.Toronto Pearson Intl
20h 50m
1 stop
STS10:35 a.m.Santa Rosa Sonoma County
4 Feb
STS2:30 p.m.Santa Rosa Sonoma County
22h 05m
2 stops
YYZ3:35 p.m.Toronto Pearson Intl
C$ 575
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
27 May
YYZ4:55 p.m.Toronto Pearson Intl
21h 46m
1 stop
STS11:41 a.m.Santa Rosa Sonoma County
2 Jun
STS4:22 p.m.Santa Rosa Sonoma County
14h 23m
2 stops
YYZ9:45 a.m.Toronto Pearson Intl
C$ 664
Find similar
American Airlines
27 May
YYZ4:55 p.m.Toronto Pearson Intl
21h 46m
1 stop
STS11:41 a.m.Santa Rosa Sonoma County
2 Jun
STS12:18 p.m.Santa Rosa Sonoma County
21h 10m
1 stop
YYZ12:28 p.m.Toronto Pearson Intl
C$ 815
Find similar
American Airlines
9 Feb
YYZ7:30 a.m.Toronto Pearson Intl
11h 23m
2 stops
STS3:53 p.m.Santa Rosa Sonoma County
18 Feb
STS4:27 p.m.Santa Rosa Sonoma County
15h 29m
2 stops
YYZ10:56 a.m.Toronto Pearson Intl
C$ 988
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 96,600 searches. Data last updated 21 December 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 3/2

4:45 p.m.-12:22 p.m.

2 stops22h 37m

Santa Rosa Sonoma County

Wed 4/2

2:30 p.m.-3:35 p.m.

2 stops22h 05m

C$ 527

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 3/2

4:45 p.m.-10:35 a.m.

1 stop20h 50m

Santa Rosa Sonoma County

Wed 4/2

2:30 p.m.-3:35 p.m.

2 stops22h 05m

C$ 555

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 3/2

4:45 p.m.-10:35 a.m.

1 stop20h 50m

Santa Rosa Sonoma County

Wed 4/2

2:30 p.m.-3:35 p.m.

2 stops22h 05m

C$ 575

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 14/4

4:45 p.m.-9:51 p.m.

1 stop8h 06m

Santa Rosa Sonoma County

Wed 15/4

7:00 a.m.-3:35 p.m.

2 stops29h 35m

C$ 632

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 27/5

4:55 p.m.-11:41 a.m.

1 stop21h 46m

Santa Rosa Sonoma County

Tue 2/6

4:22 p.m.-9:45 a.m.

2 stops14h 23m

C$ 664

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 14/4

4:45 p.m.-9:47 a.m.

2 stops20h 02m

Santa Rosa Sonoma County

Wed 15/4

1:22 p.m.-3:35 p.m.

2 stops23h 13m

C$ 672

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 27/5

4:55 p.m.-8:49 a.m.

2 stops18h 54m

Santa Rosa Sonoma County

Tue 2/6

5:21 p.m.-3:45 p.m.

2 stops19h 24m

C$ 711

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Wed 27/5

4:55 p.m.-11:41 a.m.

1 stop21h 46m

Santa Rosa Sonoma County

Tue 2/6

12:18 p.m.-12:28 p.m.

1 stop21h 10m

C$ 815

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Mon 9/2

7:30 a.m.-3:53 p.m.

2 stops11h 23m

Santa Rosa Sonoma County

Wed 18/2

4:27 p.m.-10:56 a.m.

2 stops15h 29m

C$ 988

TorontoSanta Rosa

YYZ - STS

YYZSTS

Toronto Pearson Intl

Tue 20/1

4:45 p.m.-12:22 p.m.

2 stops22h 37m

C$ 270

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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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

What is the cheapest time of day to depart on your flight to Santa Rosa?

Flying to Santa Rosa from Region of Ontario in the morning is the least expensive time of day to depart. momondo users have found prices as low as C$ 722 when looking at flights departing in the morning. In the afternoon is when there is more demand to fly to Santa Rosa, so prices are often more expensive at around C$ 1,164 per ticket.

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 06m

Direct flights

None
The fastest flight from Region of Ontario to Santa Rosa takes 8h 06m
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 are refreshed on a daily basis.

  • How old do you have to be to fly from Ontario to Santa Rosa Sonoma County Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 you'll need for your trip to Santa Rosa Sonoma County Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Santa Rosa Sonoma County Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Travelling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Fort Bragg
Little River
Mendocino

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Santa Rosa?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Santa Rosa. momondo saves you time and could save you money on your trip.

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?

Once all potential Ontario to Santa Rosa flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Santa Rosa right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Santa Rosa now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Santa Rosa and let you know when they change.

An easier way to manage your Santa Rosa trip

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