What is the cheapest airline that flies from San Francisco to Ontario?

WestJet, American Airlines, and Air Canada are the most popular carriers operating from San Francisco to Ontario

How many flights depart from San Francisco to Region of Ontario on average per day?

The number of flights available between San Francisco and Region of Ontario is 28 per day as of October 2025. The most frequent departure time is 8:00AM, with 52% of daily flights leaving in the afternoon.

What airlines fly to Region of Ontario?

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to Region of Ontario from San Francisco according to our data. Air Canada is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 8 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

How many flights depart from San Francisco to Region of Ontario on average per week?

The number of flights available between San Francisco and Region of Ontario is 202 per week as of October 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

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

Prices for flights from San Francisco Airport to Ontario are refreshed on a daily basis.

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

As of October 2025, there are 8 operators available to choose from for flights from San Francisco Airport to Ontario.

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

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 San Francisco Airport to Ontario.

What documentation or ID do you need to fly to Ontario?

The required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$99 Cheap Flights from San Francisco to Ontario in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 am - 6:58 amSFO-YYZ

17h 43m2 stops

9:45 am - 12:40 pmYYZ-SFO

5h 55mnonstop

$239Multiple Airlines

Find Deal

Thu, Dec 11 - Mon, Dec 15

10:15 am - 6:13 amSFO-YYZ

16h 58m3 stops

9:45 am - 12:40 pmYYZ-SFO

5h 55mnonstop

$242Multiple Airlines

Find Deal

Tue, Oct 28 - Wed, Oct 29

1:00 pm - 5:28 amSFO-YKF

13h 28m1 stop

6:20 am - 12:12 pmYKF-SFO

8h 52m1 stop

$246WestJet

Find Deal

Fri, Jan 16 - Thu, Jan 22

1:40 pm - 9:37 pmSFO-YYZ

4h 57mnonstop

9:45 am - 12:40 pmYYZ-SFO

5h 55mnonstop

$259Porter Airlines

Find Deal

Thu, Nov 6 - Mon, Nov 10

1:40 pm - 9:37 pmSFO-YYZ

4h 57mnonstop

9:45 am - 12:40 pmYYZ-SFO

5h 55mnonstop

$261Porter Airlines

Find Deal

Wed, Nov 5 - Thu, Feb 5

1:00 pm - 5:28 amSFO-YKF

13h 28m1 stop

6:20 am - 12:12 pmYKF-SFO

8h 52m1 stop

$261WestJet

Find Deal

Fri, Nov 7 - Thu, Nov 13

8:25 am - 7:55 pmSFO-YTZ

8h 30m1 stop

3:30 pm - 9:22 pmYTZ-SFO

8h 52m1 stop

$308Air Canada

Find Deal

Sat, Nov 8 - Sat, Nov 15

8:25 am - 9:35 pmSFO-YTZ

10h 10m1 stop

3:30 pm - 9:22 pmYTZ-SFO

8h 52m1 stop

$348Air Canada

Find Deal

Fri, Dec 5 - Sun, Dec 7

5:15 am - 5:06 pmSFO-YOW

8h 51m1 stop

12:54 pm - 7:21 pmYOW-SFO

9h 27m1 stop

$350United Airlines

Find Deal

Wed, Oct 22 - Sat, Oct 25

5:05 am - 10:05 pmSFO-YOW

14h 00m2 stops

2:45 pm - 8:08 pmYOW-SFO

8h 23m1 stop

$362United Airlines

Find Deal

Wed, Oct 22 - Sat, Oct 25

Porter Airlines flights from San Francisco to Region of Ontario

Our best Porter Airlines deals on San Francisco to Region of Ontario flight tickets

Porter Airlines

Nov 6

SFO1:40 pmSan Francisco

4h 57m

YYZ9:37 pmToronto Pearson Intl

Nov 10

YYZ9:45 amToronto Pearson Intl

5h 55m

SFO12:40 pmSan Francisco

$259

Find similar

Porter Airlines

Nov 5

SFO1:40 pmSan Francisco

4h 57m

YYZ9:37 pmToronto Pearson Intl

Feb 5

YYZ9:45 amToronto Pearson Intl

5h 55m

SFO12:40 pmSan Francisco

$261

Find similar

Porter Airlines

Nov 18

SFO1:40 pmSan Francisco

4h 57m

YYZ9:37 pmToronto Pearson Intl

Nov 22

YYZ9:45 amToronto Pearson Intl

5h 55m

SFO12:40 pmSan Francisco

$262

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WestJet flights from San Francisco to Region of Ontario

Our best WestJet deals on San Francisco to Region of Ontario flight tickets

WestJet

Jan 16

SFO1:00 pmSan Francisco

13h 28m

1 stop

YKF5:28 amToronto Region of Waterloo Intl

Jan 22

YKF6:20 amToronto Region of Waterloo Intl

8h 52m

1 stop

SFO12:12 pmSan Francisco

$246

Find similar

WestJet

Nov 7

SFO1:00 pmSan Francisco

13h 28m

1 stop

YKF5:28 amToronto Region of Waterloo Intl

Nov 13

YKF6:20 amToronto Region of Waterloo Intl

8h 52m

1 stop

SFO12:12 pmSan Francisco

$261

Find similar

WestJet

Nov 9

SFO1:00 pmSan Francisco

13h 28m

1 stop

YKF5:28 amToronto Region of Waterloo Intl

Nov 13

YKF6:20 amToronto Region of Waterloo Intl

8h 52m

1 stop

SFO12:12 pmSan Francisco

$266

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from San Francisco to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Thu 12/11

10:15 am-6:58 am

2 stops17h 43m

Toronto Pearson Intl

Mon 12/15

9:45 am-12:40 pm

Nonstop5h 55m

$239

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Tue 10/28

10:15 am-6:13 am

3 stops16h 58m

Toronto Pearson Intl

Wed 10/29

9:45 am-12:40 pm

Nonstop5h 55m

$242

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 1/16

1:00 pm-5:28 am

1 stop13h 28m

Toronto Region of Waterloo Intl

Thu 1/22

6:20 am-12:12 pm

1 stop8h 52m

$246

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Thu 11/6

1:40 pm-9:37 pm

Nonstop4h 57m

Toronto Pearson Intl

Mon 11/10

9:45 am-12:40 pm

Nonstop5h 55m

$259

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Wed 11/5

1:40 pm-9:37 pm

Nonstop4h 57m

Toronto Pearson Intl

Thu 2/5

9:45 am-12:40 pm

Nonstop5h 55m

$261

San FranciscoToronto

SFO - YKF

SFOYKF

San Francisco

Fri 11/7

1:00 pm-5:28 am

1 stop13h 28m

Toronto Region of Waterloo Intl

Thu 11/13

6:20 am-12:12 pm

1 stop8h 52m

$261

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Sat 11/8

8:25 am-7:55 pm

1 stop8h 30m

Toronto Island

Sat 11/15

3:30 pm-9:22 pm

1 stop8h 52m

$308

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Fri 12/5

8:25 am-9:35 pm

1 stop10h 10m

Toronto Island

Sun 12/7

3:30 pm-9:22 pm

1 stop8h 52m

$348

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Wed 10/22

5:15 am-5:06 pm

1 stop8h 51m

Ottawa

Sat 10/25

12:54 pm-7:21 pm

1 stop9h 27m

$350

San FranciscoOttawa

SFO - YOW

SFOYOW

San Francisco

Wed 10/22

5:05 am-10:05 pm

2 stops14h 00m

Ottawa

Sat 10/25

2:45 pm-8:08 pm

1 stop8h 23m

$362

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Francisco to Region of Ontario

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

Prices

Airlines

Other information

What is the cheapest month to fly to Region of Ontario?

The month of April is, on average, the cheapest month to fly to Region of Ontario from San Francisco, with most prices found around $348. If you aren’t able to travel during the month of April, then book flights to Region of Ontario from San Francisco during March instead. Flights to Region of Ontario in March, while not as cheap as those in April, still average around $359.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Wednesday is the cheapest day to fly to Region of Ontario from San Francisco. The lowest ticket price found for a Wednesday departure recently was $553. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from San Francisco to Region of Ontario on a Sunday will generally be more expensive and average around $673. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is at noon. momondo users have found flights departing from San Francisco to Region of Ontario at noon for as low as $418. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $745.

What is the cheapest San Francisco to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

You are more likely to see cheaper flights to Region of Ontario from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $435 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from San Francisco for as low as $344 on momondo.

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

There are 4 cabin classes available to choose from on San Francisco to Ontario 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 San Francisco to Region of Ontario flights?

You could potentially save up to 19% on your flight if you consider stops on a San Francisco to Region of Ontario flight.

Cheap San Francisco to Region of Ontario flight deals and tips

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

Best Price Found	$176
Fastest flight time	4h 55m
Direct flights	Every day
Airports in Region of Ontario	1 airport

The best one-way flight to Region of Ontario from San Francisco in the past 72 hours is $176. The best round-trip flight deal from San Francisco to Region of Ontario found on momondo in the last 72 hours is $424.

The fastest flight from San Francisco to Region of Ontario takes 4h 55m

Direct flights go from San Francisco to Region of Ontario every day.

There is 1 airport near Region of Ontario: Toronto Pearson Intl (YYZ)

Search flight deals

When did momondo last update prices for flights from San Francisco Airport to Ontario?
Prices for flights from San Francisco Airport to Ontario are refreshed on a daily basis.
How many operators does momondo search for flights from San Francisco Airport to Ontario?
As of October 2025, there are 8 operators available to choose from for flights from San Francisco Airport to Ontario.
How old do you have to be to fly from San Francisco Airport to Ontario?
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 San Francisco Airport to Ontario.
What documentation or ID do you need to fly to Ontario?
The required travel and health documents for your Ontario trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from San Francisco to Region of Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from San Francisco to Region of Ontario is Embraer 195 E2 (35.30% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (23.53%), Airbus A220-300 (15.09%), and Boeing 737-800 (13.57%).

Best airlines flying from San Francisco to Region of Ontario

Compare and see reviews for airlines that fly from San Francisco to Region of Ontario with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $36	Free Cancellation	Rating 5.8 3,145 reviews	Search Frontier flights
Air Canada	PriceFrom $136	Free Cancellation	Rating 7.1 10,251 reviews	Search Air Canada flights
WestJet	PriceFrom $162	Free Cancellation	Rating 7.2 3,120 reviews	Search WestJet flights
Porter Airlines	PriceFrom $168	Free Cancellation	Rating 7.9 376 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $186	Free Cancellation	Rating 7.4 8,958 reviews	Search United Airlines flights
Air Transat	PriceFrom $192	Free Cancellation	Rating 7.7 455 reviews	Search Air Transat flights
Delta	PriceFrom $197	Free Cancellation	Rating 7.9 7,969 reviews	Search Delta flights
American Airlines	PriceFrom $403	Free Cancellation	Rating 7.2 11,042 reviews	Search American Airlines flights

Why use momondo?

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

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

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

Flights from San Francisco to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo helps you find the best flight between San Francisco and Ontario 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 San Francisco to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from San Francisco and alert you when they change.

An easier way to manage your Region of Ontario 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.

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Find better results for your trip to Ontario

Popular cities in Ontario

Flights to Torontofrom $97

Flights to Vancouverfrom $84

Flights to Montrealfrom $145

Flights to Calgaryfrom $126

Flights to Ottawafrom $213

Flights to Halifaxfrom $198

Flights to Winnipegfrom $173

Flights to Québec Cityfrom $198

Flights to Saskatoonfrom $144

Flights to Kelownafrom $121

Flights to St. John'sfrom $246

Flights to Reginafrom $189

Cheap flights from San Francisco to Ontario from $99

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to Ontario departing on 11/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from San Francisco to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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Porter Airlines flights from San Francisco to Region of Ontario

Our best Porter Airlines deals on San Francisco to Region of Ontario flight tickets

WestJet flights from San Francisco to Region of Ontario

Our best WestJet deals on San Francisco to Region of Ontario flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from San Francisco to Ontario that are best for you.

See travel insights to Ontario from

How to get the cheapest flight ticket from San Francisco to Region of Ontario

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 Region of Ontario?

What is the cheapest day to depart on your flight to Region of Ontario?

What is the cheapest time of day to depart on your flight to Region of Ontario?

What is the cheapest San Francisco to Ontario flight route?

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

How far in advance should I book a flight to Region of Ontario?

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

There are 4 cabin classes available to choose from on San Francisco to Ontario 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 San Francisco to Region of Ontario flights?

You could potentially save up to 19% on your flight if you consider stops on a San Francisco to Region of Ontario flight.

What is the cheapest airline that flies from San Francisco to Ontario?

WestJet, American Airlines, and Air Canada are the most popular carriers operating from San Francisco to Ontario

What airlines fly to Region of Ontario?

How many flights depart from San Francisco to Region of Ontario on average per day?

The number of flights available between San Francisco and Region of Ontario is 28 per day as of October 2025. The most frequent departure time is 8:00AM, with 52% of daily flights leaving in the afternoon.

How many flights depart from San Francisco to Region of Ontario on average per week?

The number of flights available between San Francisco and Region of Ontario is 202 per week as of October 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

Cheap San Francisco to Region of Ontario flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Region of Ontario

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

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

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

What documentation or ID do you need to fly to Ontario?

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

Best airlines flying from San Francisco to Region of Ontario

Compare and see reviews for airlines that fly from San Francisco to Region of Ontario with momondo

Why use momondo?

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

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

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

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

An easier way to manage your Region of Ontario 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ontario

Popular cities in Ontario

Popular flights according to clicks in the last 7 days on momondo