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>

C$ 198 CHEAP FLIGHTS from Ontario to San Francisco

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Flight Deals

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

Mon, 20 Oct - Thu, 23 Oct

6:00 a.m. - 11:54 a.m.YHM-SFO

8h 54m1 stop

12:50 p.m. - 12:40 a.m.SFO-YHM

8h 50m1 stop

C$ 346WestJet

Find Deal

Mon, 6 Oct - Thu, 9 Oct

6:00 a.m. - 11:54 a.m.YHM-SFO

8h 54m1 stop

12:50 p.m. - 12:40 a.m.SFO-YHM

8h 50m1 stop

C$ 349WestJet

Find Deal

Wed, 1 Oct - Sat, 11 Oct

6:30 a.m. - 9:24 p.m.YKF-SFO

17h 54m2 stops

12:50 p.m. - 5:30 a.m.SFO-YKF

13h 40m2 stops

C$ 383

Find Deal

Fri, 3 Oct - Mon, 6 Oct

9:45 a.m. - 12:23 p.m.YYZ-SFO

5h 38mdirect

7:30 a.m. - 12:31 a.m.SFO-YYZ

14h 01m2 stops

C$ 383

Find Deal

Tue, 11 Nov - Tue, 18 Nov

9:45 a.m. - 12:40 p.m.YYZ-SFO

5h 55mdirect

1:40 p.m. - 9:37 p.m.SFO-YYZ

4h 57mdirect

C$ 385Porter Airlines

Find Deal

Sun, 26 Oct - Sat, 1 Nov

9:45 a.m. - 12:40 p.m.YYZ-SFO

5h 55mdirect

1:40 p.m. - 9:37 p.m.SFO-YYZ

4h 57mdirect

C$ 392Porter Airlines

Find Deal

Tue, 28 Oct - Tue, 4 Nov

10:25 a.m. - 9:22 p.m.YTZ-SFO

13h 57m2 stops

8:25 a.m. - 9:35 p.m.SFO-YTZ

10h 10m1 stop

C$ 394Air Canada

Find Deal

Tue, 28 Oct - Tue, 4 Nov

3:30 p.m. - 9:22 p.m.YTZ-SFO

8h 52m1 stop

8:25 a.m. - 9:35 p.m.SFO-YTZ

10h 10m1 stop

C$ 399Air Canada

Find Deal

Tue, 11 Nov - Wed, 12 Nov

12:05 p.m. - 9:05 p.m.YOW-SFO

12h 00m2 stops

12:43 a.m. - 2:30 p.m.SFO-YOW

10h 47m2 stops

C$ 404United Airlines

Find Deal

Wed, 19 Nov - Sun, 23 Nov

6:20 a.m. - 3:16 p.m.YOW-SFO

11h 56m2 stops

7:10 p.m. - 3:23 p.m.SFO-YOW

17h 13m2 stops

C$ 406United Airlines

Find Deal

Cheapest round-trip

C$ 346

Overall average: C$ 504

WestJet

Mon 20/10Thu 23/10

YHM - SFO • 1 stop

Cheapest direct flights

C$ 383

Typical prices: C$ 494-620

Porter Airlines

Mon 27/10Mon 3/11

YYZ - SFO • Direct

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KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to San Francisco!

Useful Info

Low season	January
High season	December
Cheapest flight	C$ 198

Best time to beat the crowds (6% less expensive on average)

Most popular time to fly (44% more expensive on average)

Flight from Ottawa 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.

South San Francisco

Redwood City

Sunnyvale

San Mateo

Palo Alto

Santa Clara

Sonoma

San Bruno

Burlingame

Cupertino

Woodland

Big Sur

Mountain View

Millbrae

Roseville

Calistoga

Pacific Grove

Manteca

Vallejo

Milpitas

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

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

San Francisco (SFO)

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SFO

C$ 198 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

Everything you should know

Good to know

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.

Travelling 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