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Cheap flights from Ontario to San Francisco from $142

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 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to San Francisco

Cheap round-trip flights

Flair Airlines Logo
9:00 pm - 9:30 amYYZ-SFO
15h 30m1 stop
Flair Airlines Logo
10:15 am - 7:15 amSFO-YYZ
18h 00m1 stop
$240Flair Airlines
Find Deal
Thu, Oct 16 - Sun, Oct 19
Logo
10:25 pm - 9:30 amYYZ-SFO
14h 05m1 stop
Logo
10:15 am - 12:43 amSFO-YYZ
11h 28m1 stop
$253
Find Deal
Fri, Sep 12 - Mon, Sep 22
WestJet Logo
6:00 am - 11:54 amYOW-SFO
8h 54m1 stop
WestJet Logo
12:50 pm - 12:40 amSFO-YOW
8h 50m1 stop
$281WestJet
Find Deal
Tue, Sep 30 - Sun, Oct 5
WestJet Logo
6:30 am - 1:59 pmYYZ-SFO
10h 29m1 stop
WestJet Logo
12:50 pm - 5:51 amSFO-YYZ
14h 01m2 stops
$281WestJet
Find Deal
Sun, Aug 31 - Sun, Sep 7
Porter Airlines Logo
7:00 am - 12:23 pmYOW-SFO
8h 23m1 stop
Porter Airlines Logo
1:25 pm - 12:21 amSFO-YOW
7h 56m1 stop
$289Porter Airlines
Find Deal
Wed, Oct 1 - Sun, Oct 5
Air Canada Logo
2:40 pm - 7:51 pmYOW-SFO
8h 11m1 stop
Air Canada Logo
7:10 am - 8:53 pmSFO-YOW
10h 43m1 stop
$291Air Canada
Find Deal
Tue, Sep 16 - Tue, Sep 23
Porter Airlines Logo
7:00 am - 12:23 pmYOW-SFO
8h 23m1 stop
Porter Airlines Logo
1:25 pm - 12:21 amSFO-YOW
7h 56m1 stop
$293Porter Airlines
Find Deal
Wed, Oct 1 - Sun, Oct 5
Air Canada Logo
2:40 pm - 7:51 pmYOW-SFO
8h 11m1 stop
Air Canada Logo
11:40 am - 10:04 pmSFO-YOW
7h 24m1 stop
$295Air Canada
Find Deal
Wed, Oct 1 - Sun, Oct 5
United Airlines Logo
6:30 pm - 9:40 pmYUL-SFO
6h 10mnonstop
United Airlines Logo
11:45 pm - 8:16 amSFO-YUL
5h 31mnonstop
$326United Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
United Airlines Logo
6:30 pm - 9:40 pmYUL-SFO
6h 10mnonstop
United Airlines Logo
11:45 pm - 8:16 amSFO-YUL
5h 31mnonstop
$331United Airlines
Find Deal
Fri, Aug 22 - Sun, Aug 31

WestJet flights from Region of Ontario to San Francisco

Our best WestJet deals on Region of Ontario to San Francisco flight tickets
WestJet
Sep 30
YOW6:00 amOttawa
8h 54m
1 stop
SFO11:54 amSan Francisco
Oct 5
SFO12:50 pmSan Francisco
8h 50m
1 stop
YOW12:40 amOttawa
$281
Find similar
WestJet
Aug 25
YYZ6:30 amToronto Pearson Intl
10h 29m
1 stop
SFO1:59 pmSan Francisco
Sep 3
SFO12:50 pmSan Francisco
8h 32m
1 stop
YYZ12:22 amToronto Pearson Intl
$282
Find similar
WestJet
Oct 1
YOW6:00 amOttawa
8h 54m
1 stop
SFO11:54 amSan Francisco
Oct 5
SFO12:50 pmSan Francisco
8h 50m
1 stop
YOW12:40 amOttawa
$283
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
Oct 1
YOW7:00 amOttawa
8h 23m
1 stop
SFO12:23 pmSan Francisco
Oct 5
SFO1:25 pmSan Francisco
7h 56m
1 stop
YOW12:21 amOttawa
$289
Find similar
Porter Airlines
Oct 1
YOW7:00 amOttawa
8h 23m
1 stop
SFO12:23 pmSan Francisco
Oct 5
SFO1:25 pmSan Francisco
7h 56m
1 stop
YOW12:21 amOttawa
$293
Find similar
Porter Airlines
Aug 15
YYZ9:45 amToronto Pearson Intl
5h 38m
SFO12:23 pmSan Francisco
Aug 20
SFO1:25 pmSan Francisco
5h 04m
YYZ9:29 pmToronto Pearson Intl
$415
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 August 2, 2025.
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

Thu 10/16

9:00 pm-9:30 am

1 stop15h 30m

San Francisco

Sun 10/19

10:15 am-7:15 am

1 stop18h 00m

$240

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Fri 9/12

10:25 pm-9:30 am

1 stop14h 05m

San Francisco

Mon 9/22

10:15 am-12:43 am

1 stop11h 28m

$253

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 9/30

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Sun 10/5

12:50 pm-12:40 am

1 stop8h 50m

$281

TorontoSan Francisco

YYZ - SFO

YYZSFO

Toronto Pearson Intl

Sun 8/31

6:30 am-1:59 pm

1 stop10h 29m

San Francisco

Sun 9/7

12:50 pm-5:51 am

2 stops14h 01m

$281

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 10/1

7:00 am-12:23 pm

1 stop8h 23m

San Francisco

Sun 10/5

1:25 pm-12:21 am

1 stop7h 56m

$289

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Tue 9/16

2:40 pm-7:51 pm

1 stop8h 11m

San Francisco

Tue 9/23

7:10 am-8:53 pm

1 stop10h 43m

$291

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 10/1

7:00 am-12:23 pm

1 stop8h 23m

San Francisco

Sun 10/5

1:25 pm-12:21 am

1 stop7h 56m

$293

OttawaSan Francisco

YOW - SFO

YOWSFO

Ottawa

Wed 10/1

2:40 pm-7:51 pm

1 stop8h 11m

San Francisco

Sun 10/5

11:40 am-10:04 pm

1 stop7h 24m

$295

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 8/29

6:30 pm-9:40 pm

Nonstop6h 10m

San Francisco

Mon 9/1

11:45 pm-8:16 am

Nonstop5h 31m

$326

MontrealSan Francisco

YUL - SFO

YULSFO

Montreal Pierre Elliott Trudeau Intl

Fri 8/22

6:30 pm-9:40 pm

Nonstop6h 10m

San Francisco

Sun 8/31

11:45 pm-8:16 am

Nonstop5h 31m

$331

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 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 April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $331.

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 Friday when prices can be found for as low as $429. The most expensive day to fly to San Francisco is Tuesday, with ticket prices averaging around $778.

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 at noon. Our users have found flights to San Francisco at noon for as low as $430. Flights in the evening are often more expensive with an average ticket price of $918.

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 $382 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 $338 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 7% 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

$142

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 $142. The best round-trip flight deal from Region of Ontario to San Francisco found on momondo in the last 72 hours is $240.
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 near San Francisco: 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 $174Free CancellationRating
7.2
2,980 reviews
Search WestJet flights
Air CanadaPriceFrom $222Free CancellationRating
7.1
9,855 reviews
Search Air Canada flights
United AirlinesPriceFrom $241Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
Porter AirlinesPriceFrom $250Free CancellationRating
8.0
318 reviews
Search Porter Airlines flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $308Free CancellationRating
8.0
7,983 reviews
Search Delta flights
Air TransatPriceFrom $310Free CancellationRating
7.7
424 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
Calistoga
Hayward
Bodega Bay
Sonoma
Roseville
Santa Clara
Big Sur
Daly City
Berkeley
Walnut Creek
Fremont
Half Moon Bay
South San Francisco
Redwood City
Vallejo
Sunnyvale
Pacific Grove

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

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