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Cheap flights from Ontario to San Francisco Bay Area

YYZ — SFO
5 Dec — 12 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Ontario to San Francisco Bay Area

Popular in

July

Cheapest in

January

Average price

C$ 532
Highest demand for flights based on searches. 10% potential increase in price (C$ 92 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 13 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Cheapflights Insights

Everything you need to know about your flight from Ontario to San Francisco Bay Area

How far ahead should I book a flight from Region of Ontario to San Francisco Bay Area?

Booking 79 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to San Francisco Bay Area. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Region of Ontario to San Francisco Bay Area?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 512). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 677). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to XIH?

It’s optimal to fly from Region of Ontario to San Francisco Bay Area in the evening. By choosing this option you can save up to 59% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Region of Ontario to San Francisco Bay Area?

Travelers seeking maximum savings on their Region of Ontario to San Francisco Bay Area flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

  • What are the cheapest airlines to fly from Region of Ontario to San Francisco Bay Area one-way?

    C$ 214 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Porter Airlines and Air Transat, with prices starting from C$ 221 and C$ 226, respectively.

  • Can I find deals for flights from Ontario to San Francisco Bay Area that include hotel bookings?

    Yes. In addition to deals on Ontario to San Francisco Bay Area flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to San Francisco Bay Area?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Francisco Bay Area.

  • Can I find deals for business class flights from Ontario to San Francisco Bay Area?

    Yes. Cheapflights offers flight deals from Ontario to San Francisco Bay Area by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to San Francisco Bay Area?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to San Francisco Bay Area (average of C$ 512). Flying from Region of Ontario to San Francisco Bay Area in December is currently the most expensive (average of C$ 677). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 8 airlines flying from Ontario to San Francisco Bay Area

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapestC$ 291AverageC$ 635FlexibilityNo cancel feeOn-timeN/A
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Alaska AirlinesCheapestC$ 294AverageC$ 402FlexibilityNo cancel feeOn-time75%
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WestJetCheapestC$ 304AverageC$ 536FlexibilityNo cancel feeOn-time60%
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Air CanadaCheapestC$ 331AverageC$ 751FlexibilityNo cancel feeOn-time67%
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American AirlinesCheapestC$ 353AverageC$ 627FlexibilityNo cancel feeOn-time71%
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Porter AirlinesCheapestC$ 354AverageC$ 584FlexibilityNo cancel feeOn-time52%
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Air TransatCheapestC$ 357AverageC$ 578FlexibilityNo cancel feeOn-time50%
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United AirlinesCheapestC$ 408AverageC$ 750FlexibilityNo cancel feeOn-time69%
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Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to San Francisco Bay Area?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Francisco Bay Area from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to San Francisco Bay Area?

Cheapflights simply makes it quick and affordable to book flights from Ontario to San Francisco Bay Area by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to San Francisco Bay Area with no change fees?

Need flexible booking options for your flight to San Francisco Bay Area from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to San Francisco Bay Area become cheaper?

Yes! Start tracking prices for Ontario to San Francisco Bay Area flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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