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Cheap flights from San Francisco to Ontario from $89

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 10/19. 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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Find the cheapest flights from San Francisco to Ontario

Cheap round-trip flights

Logo
10:15 am - 6:47 amSFO-YYZ
17h 32m2 stops
Logo
10:40 am - 11:58 pmYYZ-SFO
16h 18m1 stop
$228
Find Deal
Wed, Oct 8 - Tue, Oct 14
Logo
10:15 am - 12:40 amSFO-YHM
11h 25m2 stops
Logo
6:00 am - 11:54 amYHM-SFO
8h 54m1 stop
$235
Find Deal
Sat, Oct 11 - Tue, Oct 14
Logo
10:15 am - 6:47 amSFO-YYZ
17h 32m2 stops
Logo
10:40 am - 6:06 pmYYZ-SFO
10h 26m1 stop
$241
Find Deal
Sun, Oct 12 - Tue, Oct 14
WestJet Logo
12:50 pm - 12:40 amSFO-YHM
8h 50m1 stop
WestJet Logo
6:00 am - 11:54 amYHM-SFO
8h 54m1 stop
$266WestJet
Find Deal
Wed, Sep 24 - Wed, Oct 1
WestJet Logo
12:50 pm - 12:40 amSFO-YHM
8h 50m1 stop
WestJet Logo
6:00 am - 11:54 amYHM-SFO
8h 54m1 stop
$268WestJet
Find Deal
Sat, Oct 11 - Tue, Oct 14
Air Canada Logo
8:20 am - 7:46 pmSFO-YTZ
8h 26m1 stop
Air Canada Logo
12:25 pm - 7:57 pmYTZ-SFO
10h 32m1 stop
$402Air Canada
Find Deal
Tue, Aug 26 - Thu, Aug 28
Air Canada Logo
8:20 am - 9:31 pmSFO-YTZ
10h 11m1 stop
Air Canada Logo
12:25 pm - 7:57 pmYTZ-SFO
10h 32m1 stop
$406Air Canada
Find Deal
Tue, Aug 26 - Thu, Aug 28
United Airlines Logo
10:45 pm - 3:17 pmSFO-YXU
13h 32m2 stops
United Airlines Logo
6:10 am - 2:35 pmYXU-SFO
11h 25m2 stops
$582United Airlines
Find Deal
Wed, Sep 17 - Wed, Sep 24
United Airlines Logo
12:43 am - 9:27 pmSFO-YXU
17h 44m2 stops
United Airlines Logo
3:50 pm - 8:53 pmYXU-SFO
8h 03m1 stop
$591United Airlines
Find Deal
Sun, Sep 7 - Tue, Sep 16
Porter Airlines Logo
1:25 pm - 8:50 pmSFO-YQG
28h 25m1 stop
Porter Airlines Logo
8:50 am - 12:23 pmYQG-SFO
30h 33m1 stop
$730Porter Airlines
Find Deal
Fri, Sep 19 - Sun, Sep 21

WestJet flights from San Francisco to Region of Ontario

Our best WestJet deals on San Francisco to Region of Ontario flight tickets
WestJet
Sep 24
SFO12:50 pmSan Francisco
8h 50m
1 stop
YHM12:40 amHamilton
Oct 1
YHM6:00 amHamilton
8h 54m
1 stop
SFO11:54 amSan Francisco
$266
Find similar
WestJet
Oct 11
SFO12:50 pmSan Francisco
8h 50m
1 stop
YHM12:40 amHamilton
Oct 14
YHM6:00 amHamilton
8h 54m
1 stop
SFO11:54 amSan Francisco
$268
Find similar
WestJet
Sep 17
SFO12:50 pmSan Francisco
14h 01m
2 stops
YYZ5:51 amToronto Pearson Intl
Sep 27
YYZ12:00 pmToronto Pearson Intl
12h 24m
2 stops
SFO9:24 pmSan Francisco
$269
Find similar

Flair Airlines flights from San Francisco to Region of Ontario

Our best Flair Airlines deals on San Francisco to Region of Ontario flight tickets
Flair Airlines
Sep 15
SFO10:15 amSan Francisco
17h 10m
1 stop
YYZ6:25 amToronto Pearson Intl
Sep 20
YYZ9:15 pmToronto Pearson Intl
15h 15m
1 stop
SFO9:30 amSan Francisco
$285
Find similar
Flair Airlines
Aug 21
SFO10:15 amSan Francisco
17h 55m
1 stop
YKF7:10 amToronto Region of Waterloo Intl
Aug 25
YKF8:25 pmToronto Region of Waterloo Intl
16h 05m
1 stop
SFO9:30 amSan Francisco
$318
Find similar
Flair Airlines
Aug 30
SFO10:15 amSan Francisco
17h 55m
1 stop
YKF7:10 amToronto Region of Waterloo Intl
Aug 31
YKF8:25 pmToronto Region of Waterloo Intl
16h 05m
1 stop
SFO9:30 amSan Francisco
$388
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to Region of Ontario 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 5, 2025.
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

Wed 10/8

10:15 am-6:47 am

2 stops17h 32m

Toronto Pearson Intl

Tue 10/14

10:40 am-11:58 pm

1 stop16h 18m

$228

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Sat 10/11

10:15 am-12:40 am

2 stops11h 25m

Hamilton

Tue 10/14

6:00 am-11:54 am

1 stop8h 54m

$235

San FranciscoToronto

SFO - YYZ

SFOYYZ

San Francisco

Sun 10/12

10:15 am-6:47 am

2 stops17h 32m

Toronto Pearson Intl

Tue 10/14

10:40 am-6:06 pm

1 stop10h 26m

$241

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Wed 9/24

12:50 pm-12:40 am

1 stop8h 50m

Hamilton

Wed 10/1

6:00 am-11:54 am

1 stop8h 54m

$266

San FranciscoHamilton

SFO - YHM

SFOYHM

San Francisco

Sat 10/11

12:50 pm-12:40 am

1 stop8h 50m

Hamilton

Tue 10/14

6:00 am-11:54 am

1 stop8h 54m

$268

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Tue 8/26

8:20 am-7:46 pm

1 stop8h 26m

Toronto Island

Thu 8/28

12:25 pm-7:57 pm

1 stop10h 32m

$402

San FranciscoToronto

SFO - YTZ

SFOYTZ

San Francisco

Tue 8/26

8:20 am-9:31 pm

1 stop10h 11m

Toronto Island

Thu 8/28

12:25 pm-7:57 pm

1 stop10h 32m

$406

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Wed 9/17

10:45 pm-3:17 pm

2 stops13h 32m

London

Wed 9/24

6:10 am-2:35 pm

2 stops11h 25m

$582

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Sun 9/7

12:43 am-9:27 pm

2 stops17h 44m

London

Tue 9/16

3:50 pm-8:53 pm

1 stop8h 03m

$591

San FranciscoWindsor

SFO - YQG

SFOYQG

San Francisco

Fri 9/19

1:25 pm-8:50 pm

1 stop28h 25m

Windsor

Sun 9/21

8:50 am-12:23 pm

1 stop30h 33m

$730

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 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?

The month of April is, on average, the cheapest month to fly to Region of Ontario from San Francisco, with most prices found around $353. If you aren’t able to travel during the month of April, then book flights to Region of Ontario from San Francisco during February instead. Flights to Region of Ontario in February, while not as cheap as those in April, still average around $355.

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 $540. 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 $674. 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 $411. 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 $757.

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 $439 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 $358 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 28% 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

$89

Fastest flight time

5h 25m

Direct flights

Every day

Airports in Region of Ontario

8 airports
The best one-way flight to Region of Ontario from San Francisco in the past 72 hours is $89. The best round-trip flight deal from San Francisco to Region of Ontario found on momondo in the last 72 hours is $228.
The fastest flight from San Francisco to Region of Ontario takes 5h 25m
Direct flights go from San Francisco to Region of Ontario every day.
There are 8 airports near Region of Ontario: Ottawa (YOW), Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Region of Waterloo Intl (YKF), Sudbury (YSB), Toronto Pearson Intl (YYZ), Toronto Island (YTZ), Windsor (YQG), Hamilton (YHM)
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  • 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?

  • 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?

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
FrontierPriceFrom $36Free CancellationRating
5.8
3,232 reviews
Search Frontier flights
Air CanadaPriceFrom $136Free CancellationRating
7.1
9,890 reviews
Search Air Canada flights
Porter AirlinesPriceFrom $157Free CancellationRating
8.0
322 reviews
Search Porter Airlines flights
WestJetPriceFrom $162Free CancellationRating
7.2
2,997 reviews
Search WestJet flights
United AirlinesPriceFrom $186Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Air TransatPriceFrom $194Free CancellationRating
7.7
425 reviews
Search Air Transat flights
DeltaPriceFrom $197Free CancellationRating
8.0
7,985 reviews
Search Delta flights
American AirlinesPriceFrom $403Free CancellationRating
7.2
10,000 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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