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$ 207 CHEAP FLIGHTS from Ontario to San Francisco

SFO

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Cheap Flights from Ontario to San Francisco

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

Thu, 8 Oct - Tue, 13 Oct

6:10 a.m. - 12:00 p.m.

YXU

SFO

8h 50m

1 stop

6:00 a.m. - 5:20 a.m.

SFO

YXU

20h 20m

1 stop

C$ 325WestJet

Thu, 8 Oct - Tue, 13 Oct

6:10 a.m. - 9:55 p.m.

YXU

SFO

18h 45m

1 stop

6:00 a.m. - 5:20 a.m.

SFO

YXU

20h 20m

1 stop

C$ 367WestJet

Thu, 8 Oct - Tue, 13 Oct

6:10 a.m. - 12:00 p.m.

YXU

SFO

8h 50m

1 stop

6:00 a.m. - 5:20 a.m.

SFO

YXU

20h 20m

1 stop

C$ 392WestJet

Thu, 13 Aug - Tue, 18 Aug

6:15 a.m. - 12:00 p.m.

YYZ

SFO

8h 45m

1 stop

6:00 a.m. - 7:55 p.m.

SFO

YYZ

10h 55m

2 stops

C$ 393WestJet

Thu, 13 Aug - Mon, 17 Aug

12:00 p.m. - 9:55 p.m.

YYZ

SFO

12h 55m

2 stops

6:00 a.m. - 5:10 p.m.

SFO

YYZ

8h 10m

1 stop

C$ 395WestJet

Wed, 12 Aug - Mon, 17 Aug

2:30 p.m. - 9:55 p.m.

YYZ

SFO

10h 25m

2 stops

6:00 a.m. - 5:10 p.m.

SFO

YYZ

8h 10m

1 stop

C$ 396WestJet

Wed, 3 Jun - Mon, 15 Jun

6:45 a.m. - 12:20 p.m.

YUL

SFO

8h 35m

1 stop

6:05 p.m. - 7:05 a.m.

SFO

YUL

10h 00m

1 stop

C$ 491Multiple Airlines

Tue, 19 May - Tue, 1 Sep

12:30 p.m. - 9:02 p.m.

YTZ

SFO

11h 32m

1 stop

8:10 a.m. - 9:31 p.m.

SFO

YTZ

10h 21m

1 stop

C$ 518Air Canada

Mon, 18 May - Tue, 1 Sep

8:30 p.m. - 11:25 a.m.

YTZ

SFO

17h 55m

1 stop

8:10 a.m. - 9:31 p.m.

SFO

YTZ

10h 21m

1 stop

C$ 561Air Canada

Thu, 20 Aug - Tue, 25 Aug

12:30 p.m. - 8:51 p.m.

YTZ

SFO

11h 21m

1 stop

8:10 a.m. - 9:31 p.m.

SFO

YTZ

10h 21m

1 stop

C$ 570Air Canada

Useful Info

Low season	January
High season	May
Cheapest flight	C$ 207

Best time to beat the crowds (7% less expensive on average)

Most popular time to fly and prices are also 5% lower on average.

Flight from London 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.

San Mateo

Palo Alto

South San Francisco

Sunnyvale

Santa Clara

Burlingame

Sonoma

San Bruno

Redwood City

Milpitas

Lodi

Big Sur

Pacific Grove

Mountain View

Walnut Creek

Modesto

Millbrae

Healdsburg

Woodland

Fairfield

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)

SFO

C$ 207 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

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