Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Ontario to San Francisco from $170

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

Discover deals from 900+ travel sites with momondo.

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

Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:00 pm - 9:53 am
YYZ
-
SFO
16h 53m1 stop
Multiple Airlines Logo
8:23 pm - 7:36 pm
SFO
-
YYZ
20h 13m2 stops
$273Multiple Airlines
Sun, Jan 25 - Thu, Jan 29
WestJet Logo
6:00 am - 11:54 am
YKF
-
SFO
8h 54m1 stop
WestJet Logo
12:50 pm - 12:45 am
SFO
-
YKF
8h 55m1 stop
$274WestJet
Fri, May 22 - Fri, May 29
Multiple Airlines Logo
8:00 pm - 11:22 am
YYZ
-
SFO
18h 22m2 stops
Multiple Airlines Logo
10:15 am - 6:40 am
SFO
-
YYZ
17h 25m1 stop
$274Multiple Airlines
Thu, Jan 22 - Sun, Jan 25
Multiple Airlines Logo
1:30 pm - 8:49 am
YYZ
-
SFO
22h 19m2 stops
Multiple Airlines Logo
10:15 am - 12:38 am
SFO
-
YYZ
11h 23m1 stop
$275Multiple Airlines
Tue, Jan 20 - Thu, Jan 29
Multiple Airlines Logo
6:45 pm - 8:49 am
YYZ
-
SFO
41h 04m2 stops
Multiple Airlines Logo
10:15 am - 6:58 am
SFO
-
YYZ
17h 43m2 stops
$276Multiple Airlines
Mon, Jan 26 - Sun, Feb 1
Flair Airlines Logo
9:00 pm - 9:30 am
YYZ
-
SFO
15h 30m1 stop
Flair Airlines Logo
10:15 am - 6:40 am
SFO
-
YYZ
17h 25m1 stop
$282Flair Airlines
Fri, Jan 16 - Sun, Jan 18
Air Canada Logo
3:30 pm - 9:22 pm
YTZ
-
SFO
8h 52m1 stop
Air Canada Logo
8:25 am - 7:55 pm
SFO
-
YTZ
8h 30m1 stop
$313Air Canada
Tue, Jan 27 - Thu, Feb 5
Air Canada Logo
10:25 am - 9:22 pm
YTZ
-
SFO
13h 57m2 stops
Air Canada Logo
7:30 am - 9:35 pm
SFO
-
YTZ
11h 05m2 stops
$317Air Canada
Mon, Jan 26 - Sun, Feb 1
Porter Airlines Logo
6:45 am - 12:45 pm
YUL
-
SFO
9h 00m1 stop
Porter Airlines Logo
1:45 pm - 12:35 am
SFO
-
YUL
7h 50m1 stop
$374Porter Airlines
Thu, Apr 2 - Tue, Apr 7
Porter Airlines Logo
6:45 am - 12:43 pm
YUL
-
SFO
8h 58m1 stop
Porter Airlines Logo
1:45 pm - 12:35 am
SFO
-
YUL
7h 50m1 stop
$375Porter Airlines
Tue, Jan 20 - Mon, Mar 16

WestJet flights from Region of Ontario to San Francisco

Our best WestJet deals on Region of Ontario to San Francisco flight tickets
WestJet
Jan 27
YHM5:45 amHamilton
9h 27m
1 stop
SFO12:12 pmSan Francisco
Feb 5
SFO1:00 pmSan Francisco
21h 21m
1 stop
YHM1:21 pmHamilton
$267
Find similar
WestJet
May 17
YYZ9:00 amToronto Pearson Intl
11h 14m
1 stop
SFO5:14 pmSan Francisco
May 20
SFO7:30 amSan Francisco
8h 22m
1 stop
YYZ6:52 pmToronto Pearson Intl
$273
Find similar
WestJet
May 22
YKF6:00 amToronto Region of Waterloo Intl
8h 54m
1 stop
SFO11:54 amSan Francisco
May 29
SFO12:50 pmSan Francisco
8h 55m
1 stop
YKF12:45 amToronto Region of Waterloo Intl
$274
Find similar

Porter Airlines flights from Region of Ontario to San Francisco

Our best Porter Airlines deals on Region of Ontario to San Francisco flight tickets
Porter Airlines
Feb 23
YYZ9:50 amToronto Pearson Intl
5h 55m
SFO12:45 pmSan Francisco
Mar 2
SFO1:45 pmSan Francisco
4h 57m
YYZ9:42 pmToronto Pearson Intl
$286
Find similar
Porter Airlines
Feb 23
YYZ9:50 amToronto Pearson Intl
5h 55m
SFO12:45 pmSan Francisco
Mar 2
SFO1:45 pmSan Francisco
4h 57m
YYZ9:42 pmToronto Pearson Intl
$293
Find similar
Porter Airlines
Mar 8
YYZ9:50 amToronto Pearson Intl
5h 55m
SFO12:45 pmSan Francisco
Mar 14
SFO1:45 pmSan Francisco
4h 57m
YYZ9:42 pmToronto Pearson Intl
$294
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to San Francisco 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 January 4, 2026.
Use the filters below to find and compare flights from Ontario to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Sun 1/25

8:00 pm-9:53 am

1 stop16h 53m

San Francisco

Thu 1/29

8:23 pm-7:36 pm

2 stops20h 13m

$273

TorontoSan Francisco

YKF - SFO

YKFSFO

Toronto Region of Waterloo Intl

Fri 5/22

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Fri 5/29

12:50 pm-12:45 am

1 stop8h 55m

$274

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Thu 1/22

8:00 pm-11:22 am

2 stops18h 22m

San Francisco

Sun 1/25

10:15 am-6:40 am

1 stop17h 25m

$274

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Tue 1/20

1:30 pm-8:49 am

2 stops22h 19m

San Francisco

Thu 1/29

10:15 am-12:38 am

1 stop11h 23m

$275

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Mon 1/26

6:45 pm-8:49 am

2 stops41h 04m

San Francisco

Sun 2/1

10:15 am-6:58 am

2 stops17h 43m

$276

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 1/16

9:00 pm-9:30 am

1 stop15h 30m

San Francisco

Sun 1/18

10:15 am-6:40 am

1 stop17h 25m

$282

TorontoSan Francisco

YTZ - SFO

YTZSFO

Toronto Island

Tue 1/27

3:30 pm-9:22 pm

1 stop8h 52m

San Francisco

Thu 2/5

8:25 am-7:55 pm

1 stop8h 30m

$313

TorontoSan Francisco

YTZ - SFO

YTZSFO

Toronto Island

Mon 1/26

10:25 am-9:22 pm

2 stops13h 57m

San Francisco

Sun 2/1

7:30 am-9:35 pm

2 stops11h 05m

$317

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Thu 4/2

6:45 am-12:45 pm

1 stop9h 00m

San Francisco

Tue 4/7

1:45 pm-12:35 am

1 stop7h 50m

$374

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Tue 1/20

6:45 am-12:43 pm

1 stop8h 58m

San Francisco

Mon 3/16

1:45 pm-12:35 am

1 stop7h 50m

$375

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 San Francisco

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 month to fly to San Francisco?

If you aren’t able to travel to San Francisco during the month of March, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $324.

What is the cheapest day to depart on your flight to San Francisco?

The cheapest day to depart from Region of Ontario to San Francisco is on a Thursday when prices can be found for as low as $454. The most expensive day to fly to San Francisco is Tuesday, with ticket prices averaging around $728.

What is the cheapest time of day to depart on your flight to San Francisco?

Our data shows that the cheapest Region of Ontario to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $453. Flights in the evening are often more expensive with an average ticket price of $933.

What is the cheapest Ontario to San Francisco flight route?

Fly from Toronto Pearson Intl to San Francisco for the best Ontario - San Francisco flight prices

How far in advance should I book a flight to San Francisco?

You are more likely to see cheaper flights to San Francisco from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $368 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Region of Ontario for as low as $319 on momondo.

What cabin class options are available on Ontario to San Francisco flights?

There are 4 cabin classes available to choose from on Ontario to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to San Francisco flights?

You could potentially save up to 17% on your flight if you consider stops on a Region of Ontario to San Francisco flight.

Cheap Region of Ontario to San Francisco flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to San Francisco

Best Price Found

$242

Fastest flight time

5h 38m

Direct flights

Every day

Airports in San Francisco

1 airport
The best one-way flight to San Francisco from Region of Ontario in the past 72 hours is $242. The best round-trip flight deal from Region of Ontario to San Francisco found on momondo in the last 72 hours is $371.
The fastest flight from Region of Ontario to San Francisco takes 5h 38m
Direct flights go from Region of Ontario to San Francisco every day.
There is 1 airport in San Francisco. From Region of Ontario there are direct flights to San Francisco (SFO).
Search flight deals

  • When did momondo last update prices for flights from Ontario to San Francisco Airport?

    Prices for flights from Ontario to San Francisco Airport refresh daily.

  • How many operators does momondo search for flights from Ontario to San Francisco Airport?

  • How old do you have to be to fly from Ontario to San Francisco 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 San Francisco Airport.

  • What documentation or ID do you need to fly to San Francisco Airport?

    The travel and health documents required for your trip to San Francisco 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 San Francisco Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Region of Ontario to San Francisco?

Best airlines flying from Region of Ontario to San Francisco

Compare and see reviews for airlines that fly from Region of Ontario to San Francisco with momondo
Airline
Rating
Free Cancellation
Price
WestJetPriceFrom $118Free CancellationRating
7.2
3,231 reviews
Search WestJet flights
Air CanadaPriceFrom $222Free CancellationRating
7.1
10,589 reviews
Search Air Canada flights
United AirlinesPriceFrom $241Free CancellationRating
7.4
9,138 reviews
Search United Airlines flights
Porter AirlinesPriceFrom $258Free CancellationRating
8.0
403 reviews
Search Porter Airlines flights
DeltaPriceFrom $303Free CancellationRating
7.9
8,017 reviews
Search Delta flights
American AirlinesPriceFrom $307Free CancellationRating
7.2
11,078 reviews
Search American Airlines flights
Air TransatPriceFrom $324Free CancellationRating
7.7
490 reviews
Search Air Transat flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Santa Cruz
Carmel-by-the-Sea
Modesto
Sonoma
Bodega Bay
Roseville
Hayward
Calistoga
Big Sur
Santa Clara
Berkeley
Walnut Creek
Fremont
Daly City
Half Moon Bay
Vallejo
Livermore
Salinas
Turlock
Sunnyvale

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San Francisco?

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

Can I find flights from Ontario to San Francisco with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Francisco from Ontario with this policy.

How can momondo help me find flights from Ontario to San Francisco?

momondo provides multiple filters to help you find the best flight to San Francisco from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to San Francisco from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Francisco 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
Tue 2/3
Tue 2/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States