How does KAYAK find such low prices on flights from Ontario to San Francisco?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Francisco. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Francisco?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Ontario is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Ontario to San Francisco?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Ontario with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Francisco?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$135 CHEAP FLIGHTS from Ontario to San Francisco

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

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Cheap Flights from Ontario to San Francisco

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to San Francisco that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to San Francisco

Fri, Jun 6 - Mon, Jun 9

8:25 pm - 9:30 amYKF-SFO

16h 05m1 stop

10:15 am - 7:10 amSFO-YKF

17h 55m1 stop

$242Flair Airlines

Find Deal

Fri, Jun 6 - Mon, Jun 9

8:25 pm - 9:30 amYKF-SFO

16h 05m1 stop

10:15 am - 7:10 amSFO-YKF

17h 55m1 stop

$246Flair Airlines

Find Deal

Fri, Aug 29 - Mon, Sep 8

6:00 am - 11:56 amYKF-SFO

8h 56m1 stop

12:50 pm - 12:45 amSFO-YKF

8h 55m1 stop

$264WestJet

Find Deal

Tue, Jul 1 - Thu, Jul 10

9:00 am - 9:25 pmYYZ-SFO

15h 25m2 stops

7:30 am - 12:33 amSFO-YYZ

14h 03m2 stops

$266WestJet

Find Deal

Thu, Jun 5 - Thu, Jun 12

6:00 am - 1:59 pmYKF-SFO

10h 59m2 stops

10:15 am - 7:25 pmSFO-YKF

30h 10m1 stop

$269

Find Deal

Fri, Jun 6 - Mon, Jun 9

6:00 am - 1:59 pmYKF-SFO

10h 59m2 stops

10:15 am - 7:10 amSFO-YKF

17h 55m1 stop

$277

Find Deal

Thu, Jun 12 - Sat, Jun 21

9:45 am - 12:30 pmYYZ-SFO

5h 45mnonstop

1:30 pm - 9:29 pmSFO-YYZ

4h 59mnonstop

$286Porter Airlines

Find Deal

Thu, Jun 12 - Sat, Jun 21

6:45 am - 12:30 pmYUL-SFO

8h 45m1 stop

1:30 pm - 12:37 amSFO-YUL

8h 07m1 stop

$287Porter Airlines

Find Deal

Thu, Jun 12 - Mon, Jun 16

6:15 am - 12:25 pmYYZ-SFO

9h 10m1 stop

7:40 pm - 7:15 amSFO-YYZ

8h 35m1 stop

$292Air Canada

Find Deal

Thu, Jun 12 - Mon, Jun 16

6:15 am - 12:25 pmYYZ-SFO

9h 10m1 stop

7:40 pm - 7:15 amSFO-YYZ

8h 35m1 stop

$297Air Canada

Find Deal

Useful Info

Low season	January
High season	August
Cheapest flight	$135

Best time to beat the crowds but there is an average 1% increase in price.

Most popular time to fly with an average 17% increase in price.

Flight from Toronto Region of Waterloo Intl to San Francisco

JoanFlew with Porter AirlinesYYZ-SFONov 2024

Maybe get the choice above the cheapest option because you don't get a checked bag or carry on so in the end you end up paying about the same, if not more.

AndrewFlew with Porter AirlinesYYZ-SFOJul 2024

I've flown many discount airlines and I think this is the first I will not use again.

sureshFlew with United AirlinesYYZ-SFODec 2023

Eva airlines has the best overall profile for trips to singapore

How does KAYAK find such low prices on flights from Ontario to San Francisco?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Francisco.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Francisco?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Ontario to San Francisco?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Ontario with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Francisco?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Newark

Glen Ellen

Everything you need to know for your flight to San Francisco

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in San Francisco

San Francisco (SFO)

$135 Find Cheap Flights from Ontario to San Francisco

KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

Cheap Flights from Ontario to San Francisco

Recent round-trip flight deals from Ontario to San Francisco

Recent one-way flight deals from Ontario to San Francisco

Recent last minute flight deals from Ontario to San Francisco

Recent direct flight deals from Ontario to San Francisco

Good to know

Flights from Ontario to San Francisco: the best tips from KAYAK users

FAQs for booking flights from Ontario to San Francisco

How does KAYAK find such low prices on flights from Ontario to San Francisco?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Francisco.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Francisco?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Ontario to San Francisco?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Francisco with an airline and back to Ontario with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Francisco?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Francisco from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near San Francisco?

Everything you need to know for your flight to San Francisco

Information on the airport you'll fly into in San Francisco

Cabin class types available on flights to Ontario

Complete your trip to San Francisco with a hotel stay or car rental

Find direct flights for San Francisco

Flights to other popular destinations

Flights from domestic origins to San Francisco

Choose which airport to fly into in San Francisco

Find deals for your return flight